Tus nees zoo xav tau lub eeb zoo thiab siv cov cuab yeej CNC machining siab heev. Yog tias siv cov cuab yeej tsis raug, nws yuav tsis muaj txiaj ntsig! Kev xaiv cov cuab yeej tsim nyog muaj kev cuam tshuam zoo rau cov cuab yeej siv lub neej, kev ua haujlwm zoo, kev ua haujlwm zoo thiab cov nqi ua haujlwm. Kab lus no muab cov ntaub ntawv muaj txiaj ntsig txog riam kev paub, sau thiab xa tawm, cia peb kawm ua ke.
Cov cuab yeej siv yuav tsum muaj cov yam ntxwv yooj yim
Kev xaiv cov khoom siv muaj txiaj ntsig zoo rau lub neej ntawm cov cuab yeej, kev ua haujlwm zoo, kev ua haujlwm zoo thiab cov nqi ua haujlwm. Cov cuab yeej yuav tsum tiv taus siab, kub siab, kev sib txhuam, kev cuam tshuam thiab kev co thaum txiav. Yog li ntawd, cov cuab yeej siv yuav tsum muaj cov yam ntxwv hauv qab no:
(1) Hardness thiab hnav tsis kam. Lub hardness ntawm cov khoom siv yuav tsum siab tshaj qhov hardness ntawm cov khoom siv workpiece, uas feem ntau yuav tsum tau siab tshaj 60HRC. Qhov siab dua qhov hardness ntawm cov khoom siv, qhov zoo dua qhov hnav tsis kam.
(2) Lub zog thiab toughness. Cov cuab yeej siv yuav tsum muaj lub zog siab thiab toughness los tiv thaiv kev txiav quab yuam, cuam tshuam thiab kev co, thiab tiv thaiv kev tawg thiab tawg ntawm lub cuab yeej.
(3) Thaum tshav kub kub tsis kam. Cov cuab yeej siv tau zoo thaum tshav kub kub, tuaj yeem tiv taus qhov kub thiab txias, thiab muaj kev tiv thaiv oxidation zoo.
(4) Cov txheej txheem kev ua tau zoo thiab kev lag luam. Cov cuab yeej siv yuav tsum muaj kev ua haujlwm zoo forging, kev kho cua sov, kev ua haujlwm vuam; kev sib tsoo kev ua tau zoo, thiab lwm yam, thiab yuav tsum nrhiav kev ua haujlwm siab-nqi piv.
Hom, khoom, yam ntxwv, thiab kev siv ntawm cov khoom siv
1. Cov khoom siv pob zeb diamond
Pob zeb diamond yog ib qho allotrope ntawm cov pa roj carbon thiab yog cov khoom siv tawv tshaj plaws nyob rau hauv qhov xwm txheej. Pob zeb diamond txiav cov cuab yeej muaj siab hardness, siab hnav tsis kam thiab siab thermal conductivity, thiab tau dav siv hauv kev ua cov hlau tsis-ferrous thiab cov khoom tsis yog xim hlau. Tshwj xeeb tshaj yog nyob rau hauv high-ceev txiav ntawm aluminium thiab silicon-aluminium alloys, pob zeb diamond cov cuab yeej yog lub ntsiab ntawm cov cuab yeej txiav uas nyuaj los hloov. Cov cuab yeej pob zeb diamond uas tuaj yeem ua tiav kev ua haujlwm siab, ruaj khov, thiab lub neej ua haujlwm ntev yog qhov tseem ceeb thiab cov cuab yeej tseem ceeb hauv CNC machining niaj hnub.
⑴ Cov cuab yeej pob zeb diamond
① Cov cuab yeej pob zeb ntuj: Ntuj pob zeb diamond tau siv los ua cov cuab yeej txiav rau ntau pua xyoo. Ntuj ib leeg siv lead ua pob zeb diamond cov cuab yeej tau ua zoo hauv av los ua kom cov ntug txiav tau ntse heev. Qhov txiav ntug vojvoog tuaj yeem ncav cuag 0.002μm, uas tuaj yeem ua tiav kev txiav ultra-nyias. Nws tuaj yeem ua cov haujlwm ua haujlwm siab heev thiab tsis tshua muaj qhov roughness. Nws yog ib tug paub, zoo tagnrho thiab irreplaceable ultra-precision machining cuab tam.
② PCD pob zeb diamond txiav cov cuab yeej: Ntuj pob zeb diamond yog kim. Cov pob zeb diamond siv dav tshaj plaws hauv kev txiav yog polycrystalline pob zeb diamond (PCD). Txij li thaum xyoo 1970s, pob zeb diamond polycrystalline (Polycrystauine pob zeb diamond, hu ua PCD blades) tau tsim los siv cov cuab yeej siv hluav taws xob kub thiab siab siab. Tom qab nws txoj kev vam meej, cov cuab yeej pob zeb diamond ntuj tau hloov los ntawm cov khoom siv dag zog polycrystalline pob zeb diamond rau ntau zaus. PCD raw khoom yog nplua nuj nyob rau hauv qhov chaw, thiab lawv cov nqi tsuas yog ob peb mus rau ib feem kaum ntawm cov pob zeb diamond ntuj. PCD cov cuab yeej txiav tsis tuaj yeem ua hauv av los tsim cov cuab yeej ntse heev. Qhov saum npoo zoo ntawm kev txiav ntug thiab cov txheej txheem ua haujlwm tsis zoo li cov pob zeb diamond ntuj. Nws tseem tsis tau yooj yim los tsim PCD cov hniav nrog chip breakers hauv kev lag luam. Yog li ntawd, PCD tsuas yog siv tau rau kev txiav cov hlau tsis muaj hlau thiab cov hlau tsis muaj hlau, thiab nws nyuaj rau kev ua tiav ultra-siab precision txiav. Precision iav txiav.
③ CVD pob zeb diamond txiav cov cuab yeej: Txij li thaum lig 1970s mus rau thaum ntxov 1980s, CVD pob zeb diamond technology tshwm nyob rau hauv Nyiv. CVD pob zeb diamond hais txog kev siv tshuaj vapor deposition (CVD) los ua ke cov pob zeb diamond zaj duab xis rau ntawm heterogeneous matrix (xws li cemented carbide, ceramics, thiab lwm yam). CVD pob zeb diamond muaj cov qauv zoo ib yam thiab cov yam ntxwv zoo li pob zeb diamond ntuj. Kev ua tau zoo ntawm CVD pob zeb diamond yog ze heev rau cov pob zeb diamond ntuj. Nws muaj qhov zoo ntawm lub ntuj ib leeg pob zeb diamond thiab polycrystalline pob zeb diamond (PCD), thiab kov yeej lawv qhov tsis txaus rau qee yam.
⑵ Kev ua tau zoo ntawm cov cuab yeej pob zeb diamond
① Hardness siab heev thiab hnav tsis kam: Ntuj pob zeb diamond yog cov khoom nyuaj tshaj plaws nyob rau hauv qhov xwm txheej. Pob zeb diamond muaj qhov hnav tsis kam zoo heev. Thaum ua cov khoom siv high-hardness, lub neej ntawm cov cuab yeej pob zeb diamond yog 10 txog 100 npaug ntawm cov cuab yeej carbide, lossis txawm ntau pua zaus.
② Muaj kev sib txhuam coefficient tsawg heev: Kev sib txhuam coefficient ntawm pob zeb diamond thiab qee cov hlau tsis muaj hlau yog qis dua lwm cov cuab yeej txiav. Kev sib txhuam coefficient tsawg, qhov deformation thaum ua haujlwm me me, thiab txiav quab yuam tuaj yeem txo.
③ Kev txiav ntug yog qhov ntse heev: Lub txiav ntug ntawm cov cuab yeej pob zeb diamond tuaj yeem ua rau hauv av ntse heev. Lub ntuj ib leeg siv lead ua pob zeb diamond cuab yeej tuaj yeem siab li 0.002 ~ 0.008μm, uas tuaj yeem nqa tawm ultra-nyias txiav thiab ultra-precision ua.
④ High thermal conductivity: Pob zeb diamond muaj thermal conductivity thiab thermal diffusivity, yog li txiav cov cua sov yog yooj yim dissipated thiab qhov kub ntawm qhov txiav ib feem ntawm lub cuab tam yog tsawg.
⑤ Muaj cov thermal expansion coefficient qis dua: Lub thermal expansion coefficient ntawm pob zeb diamond yog ob peb zaug me dua li ntawm cemented carbide, thiab qhov kev hloov ntawm cov cuab yeej loj los ntawm kev txiav cov cua sov me me, uas yog qhov tseem ceeb tshwj xeeb rau precision thiab ultra-precision machining. yuav tsum muaj qhov tseeb qhov tseeb.
⑶ Kev siv cov cuab yeej pob zeb diamond
Cov cuab yeej pob zeb diamond feem ntau yog siv rau kev txiav npluav thiab tho txawv ntawm cov hlau tsis muaj hlau thiab cov khoom tsis yog hlau ntawm kev kub ceev. Haum rau kev ua ntau yam hnav-resistant non-hlau, xws li fiberglass hmoov metallurgy blanks, ceramic cov ntaub ntawv, thiab lwm yam .; ntau yam hnav-resistant non-ferrous hlau, xws li ntau yam silicon-aluminium alloys; thiab ua tiav ntawm ntau yam tsis-ferrous hlau.
Qhov tsis zoo ntawm cov cuab yeej pob zeb diamond yog tias lawv tsis muaj thermal stability. Thaum lub txiav kub siab tshaj 700 ℃ ~ 800 ℃, lawv yuav plam lawv hardness kiag li. Tsis tas li ntawd, lawv tsis haum rau kev txiav ferrous hlau vim pob zeb diamond (carbon) yooj yim reacts nrog hlau ntawm qhov kub thiab txias. Atomic action converts carbon atoms rau hauv graphite qauv, thiab cov cuab yeej yog yooj yim puas.
2. Cubic boron nitride khoom siv
Cubic boron nitride (CBN), qhov thib ob superhard cov khoom tsim los siv txoj kev zoo ib yam li pob zeb diamond tsim, yog thib ob tsuas yog pob zeb diamond nyob rau hauv cov nqe lus ntawm hardness thiab thermal conductivity. Nws muaj thermal stability zoo heev thiab tuaj yeem ua kom sov rau 10,000C hauv qhov chaw. Tsis muaj oxidation tshwm sim. CBN muaj cov tshuaj ruaj khov heev rau cov hlau ferrous thiab tuaj yeem siv dav hauv kev ua cov khoom hlau.
⑴ Hom cubic boron nitride tej cuab yeej
Cubic boron nitride (CBN) yog ib yam khoom uas tsis muaj nyob hauv cov xwm txheej. Nws muab faib ua ib leeg siv lead ua thiab polycrystalline, uas yog CBN ib leeg siv lead ua thiab polycrystalline cubic boron nitride (Polycrystalline cubic bornnitride, PCBN luv luv). CBN yog ib qho ntawm cov allotropes ntawm boron nitride (BN) thiab muaj cov qauv zoo ib yam li pob zeb diamond.
PCBN (polycrystalline cubic boron nitride) yog cov khoom siv polycrystalline uas cov ntaub ntawv zoo CBN raug sintered ua ke los ntawm kev sib khi theem (TiC, TiN, Al, Ti, thiab lwm yam) nyob rau hauv qhov kub thiab txias. Tam sim no nws yog qhov thib ob-hardest artificially synthesized khoom. Cov khoom siv pob zeb diamond, ua ke nrog pob zeb diamond, yog sib sau ua ke hu ua superhard tool material. PCBN feem ntau yog siv los ua riam lossis lwm yam cuab yeej.
PCBN txiav cov cuab yeej tuaj yeem muab faib ua cov khoom PCBN thiab PCBN cov hniav sib xyaw sintered nrog carbide.
PCBN composite blades yog tsim los ntawm sintering ib txheej ntawm PCBN nrog ib tug tuab ntawm 0.5 mus rau 1.0mm ntawm ib tug cemented carbide nrog zoo zog thiab toughness. Nws qhov kev ua tau zoo ua ke zoo toughness nrog siab hardness thiab hnav tsis kam. Nws daws cov teeb meem ntawm qhov tsis muaj zog dabtsi yog khoov thiab nyuaj vuam ntawm CBN hniav.
⑵ Cov khoom tseem ceeb thiab cov yam ntxwv ntawm cubic boron nitride
Txawm hais tias lub hardness ntawm cubic boron nitride yog me ntsis qis dua pob zeb diamond, nws yog ntau dua li lwm cov ntaub ntawv high-hardness. Qhov zoo tshaj plaws ntawm CBN yog tias nws cov thermal stability ntau dua li cov pob zeb diamond, ncav cuag qhov kub siab tshaj 1200 ° C (pob zeb diamond yog 700-800 ° C). Lwm qhov zoo dua yog tias nws yog tshuaj lom neeg tsis muaj zog thiab tsis hnov mob nrog hlau ntawm 1200-1300 ° C. tshuaj tiv thaiv. Cov yam ntxwv tseem ceeb ntawm cubic boron nitride yog raws li hauv qab no.
① High hardness thiab hnav tsis kam: CBN siv lead ua qauv zoo ib yam li pob zeb diamond, thiab muaj zog zoo sib xws rau pob zeb diamond. PCBN tshwj xeeb tshaj yog tsim rau kev ua cov ntaub ntawv hardness uas tsuas yog hauv av ua ntej, thiab tuaj yeem tau txais qhov zoo ntawm qhov chaw ua haujlwm.
② High thermal stability: Lub tshav kub tsis kam ntawm CBN tuaj yeem ncav cuag 1400 ~ 1500 ℃, uas yog yuav luag 1 zaug siab dua li qhov kub ntawm cov pob zeb diamond (700 ~ 800 ℃). PCBN cov cuab yeej tuaj yeem txiav cov khoom kub kub thiab cov hlau tawv tawv ntawm kev kub ceev 3 txog 5 npaug siab dua cov cuab yeej carbide.
③ Kev ruaj ntseg tshuaj zoo heev: Nws tsis muaj tshuaj lom neeg nrog cov khoom siv hlau mus txog 1200-1300 ° C, thiab yuav tsis hnav zoo li pob zeb diamond. Nyob rau lub sijhawm no, nws tseem tuaj yeem tswj tau qhov hardness ntawm cemented carbide; PCBN cov cuab yeej tsim nyog rau kev txiav quenched steel Parts thiab chilled cam khwb cia hlau, tuaj yeem siv dav hauv high-speed txiav ntawm cam khwb cia hlau.
④ Cov thermal conductivity zoo: Txawm hais tias lub thermal conductivity ntawm CBN tsis tuaj yeem nrog pob zeb diamond, thermal conductivity ntawm PCBN ntawm ntau yam khoom siv yog thib ob rau pob zeb diamond, thiab ntau dua li cov hlau ceev thiab cemented carbide.
⑤ Muaj qhov sib txhuam qis dua: Kev sib txhuam qis qis tuaj yeem ua rau txo qis hauv kev txiav quab yuam thaum txiav, txo qhov kub thiab txias, thiab txhim kho qhov zoo ntawm cov tshuab ua haujlwm.
⑶ Daim ntawv thov ntawm cubic boron nitride tej cuab yeej
Cubic boron nitride yog tsim rau kev ua tiav ntau yam nyuaj-rau-txiav cov ntaub ntawv xws li quenched steel, tawv cam khwb cia hlau, high-temperature alloys, cemented carbide, thiab cov khoom siv tshuaj tsuag. Kev ua haujlwm raug tuaj yeem ncav cuag IT5 (lub qhov yog IT6), thiab tus nqi ntawm qhov roughness tuaj yeem me me li Ra1.25 ~ 0.20μm.
Cubic boron nitride cov cuab yeej siv tsis zoo toughness thiab khoov lub zog. Yog li ntawd, cubic boron nitride tig cov cuab yeej tsis haum rau kev ua haujlwm ntxhib ntawm qhov nrawm thiab muaj kev cuam tshuam loj; Nyob rau tib lub sijhawm, lawv tsis haum rau kev txiav cov ntaub ntawv nrog cov yas siab (xws li aluminium alloys, tooj liab alloys, nickel-based alloys, steels nrog high plasticity, thiab lwm yam), vim hais tias kev txiav cov npoo loj loj yuav tshwm sim thaum ua haujlwm. nrog hlau, deteriorating lub machined nto.
3. cov khoom siv ceramic
Ceramic tej cuab yeej muaj cov yam ntxwv ntawm siab hardness, zoo hnav tsis kam, zoo heev tshav kub tsis kam thiab tshuaj stability, thiab tsis yooj yim rau daim ntawv cog lus nrog hlau. Cov cuab yeej ceramic ua lub luag haujlwm tseem ceeb hauv CNC machining. Cov cuab yeej ceramic tau dhau los ua ib qho ntawm cov cuab yeej tseem ceeb rau kev kub ceev txiav thiab ua cov ntaub ntawv nyuaj rau tshuab. Ceramic tej cuab yeej yog dav siv nyob rau hauv high-ceev txiav, txiav qhuav, txiav nyuaj thiab txiav cov ntaub ntawv nyuaj-rau-tshuab. Cov cuab yeej ceramic tuaj yeem ua cov ntaub ntawv nyuaj uas cov cuab yeej siv tsis tuaj yeem ua txhua yam, paub txog "tig es tsis txhob sib tsoo"; qhov pom kev txiav ceev ntawm cov cuab yeej ceramic tuaj yeem yog 2 mus rau 10 npaug siab dua li cov cuab yeej carbide, yog li txhim kho kev txiav ntau lawm. ; Cov ntaub ntawv tseem ceeb siv hauv cov khoom siv ceramic yog cov khoom siv ntau tshaj plaws hauv lub ntiaj teb crust. Yog li ntawd, kev nce qib thiab kev siv cov cuab yeej ceramic yog qhov tseem ceeb rau kev txhim kho cov khoom lag luam, txo cov nqi ua haujlwm, thiab txuag cov tswv yim muaj txiaj ntsig zoo. Nws kuj tseem yuav txhawb nqa txoj kev loj hlob ntawm kev siv tshuab txiav. kev vam meej.
⑴ Hom khoom siv ceramic
Cov khoom siv ceramic feem ntau tuaj yeem muab faib ua peb pawg: alumina-based ceramics, silicon nitride-based ceramics, thiab cov khoom siv silicon nitride-alumina-based ceramics. Ntawm lawv, alumina-based thiab silicon nitride-raws li cov khoom siv ceramic yog cov khoom siv dav tshaj plaws. Kev ua tau zoo ntawm silicon nitride-based ceramics yog qhov zoo tshaj plaws ntawm alumina-based ceramics.
⑵ Kev ua tau zoo thiab cov yam ntxwv ntawm cov cuab yeej ceramic
① High hardness thiab zoo hnav tsis kam: Txawm hais tias hardness ntawm ceramic txiav cov cuab yeej tsis siab li PCD thiab PCBN, nws yog ntau dua li cov carbide thiab high-speed steel txiav cov cuab yeej, ncav cuag 93-95HRA. Ceramic txiav cov cuab yeej tuaj yeem ua cov ntaub ntawv nyuaj uas nyuaj rau txheej txheem nrog cov cuab yeej txiav tsoos thiab tsim nyog rau kev txiav ceev ceev thiab txiav nyuaj.
② Kub kub thiab kub tsis kam: Ceramic tej cuab yeej tseem tuaj yeem txiav ntawm qhov kub siab tshaj 1200 ° C. Ceramic txiav cov cuab yeej muaj cov cuab yeej kub kub zoo. A12O3 ceramic tej cuab yeej muaj tshwj xeeb zoo oxidation kuj. Txawm hais tias qhov txiav ntug nyob rau hauv lub xeev kub kub, nws tuaj yeem siv tsis tu ncua. Yog li ntawd, cov cuab yeej ceramic tuaj yeem ua tiav kev txiav qhuav, yog li tshem tawm qhov xav tau ntawm kev txiav cov kua dej.
③ Kev ruaj ntseg tshuaj zoo: Ceramic tej cuab yeej tsis yooj yim rau kev cog lus nrog hlau, thiab yog corrosion-resistant thiab muaj tshuaj lom neeg ruaj khov, uas tuaj yeem txo cov kev sib txuas ntawm cov cuab yeej txiav.
④ Tsis tshua muaj kev sib txhuam coefficient: Cov affinity ntawm cov cuab yeej ceramic thiab hlau yog me me, thiab kev sib txhuam coefficient tsawg, uas tuaj yeem txo qhov txiav quab yuam thiab txiav kub.
⑶ Ceramic riam muaj daim ntawv thov
Ceramics yog ib qho ntawm cov cuab yeej siv feem ntau yog siv rau kev ua tiav high-speed thiab semi-tiav. Ceramic txiav cov cuab yeej tsim nyog rau kev txiav ntau yam cam khwb cia hlau (grey cam khwb cia hlau, ductile hlau, malleable cam khwb cia hlau, chilled cam khwb cia hlau, siab alloy hnav-resistant cam khwb cia hlau) thiab steel cov ntaub ntawv (carbon structural steel, alloy structural steel, siab zog steel, siab manganese steel, quenched steel thiab lwm yam), kuj tuaj yeem siv los txiav tooj liab alloys, graphite, engineering plastics thiab cov ntaub ntawv sib xyaw.
Cov khoom siv ntawm cov cuab yeej txiav ceramic muaj cov teeb meem ntawm qhov tsis muaj zog dabtsi yog khoov thiab tsis zoo cuam tshuam rau lub zog, ua rau lawv tsis tsim nyog rau kev txiav ntawm qhov qis qis thiab hauv qab kev cuam tshuam.
4. Cov khoom siv coated
Txheej cov cuab yeej txiav yog ib txoj hauv kev tseem ceeb los txhim kho cov cuab yeej ua haujlwm. Qhov tshwm sim ntawm cov cuab yeej coated tau ua rau muaj kev cuam tshuam loj hauv kev ua haujlwm ntawm cov cuab yeej txiav. Cov cuab yeej coated yog coated nrog ib los yog ntau txheej ntawm refractory tebchaw nrog zoo hnav tsis kam ntawm lub cev lub cev nrog zoo toughness. Nws muab cov cuab yeej matrix nrog cov txheej txheej nyuaj, yog li txhim kho cov cuab yeej ua haujlwm tau zoo. Cov cuab yeej coated tuaj yeem txhim kho kev ua tau zoo, txhim kho kev ua haujlwm raug, txuas ntxiv cov cuab yeej siv lub neej, thiab txo cov nqi ua haujlwm.
Txog 80% ntawm cov cuab yeej txiav siv hauv cov cuab yeej siv tshuab CNC tshiab siv cov cuab yeej coated. Cov cuab yeej coated yuav yog cov cuab yeej tseem ceeb tshaj plaws hauv kev ua haujlwm ntawm CNC machining yav tom ntej.
⑴ Cov cuab yeej coated
Raws li cov txheej txheem txheej txheej sib txawv, cov cuab yeej coated tuaj yeem muab faib ua cov tshuaj vapor deposition (CVD) coated cov cuab yeej thiab lub cev vapor deposition (PVD) coated cov cuab yeej. Coated carbide tej cuab yeej feem ntau siv cov tshuaj vapor deposition txoj kev, thiab cov deposition kub nyob ib ncig ntawm 1000 ° C. Coated high-speed steel tej cuab yeej feem ntau siv lub cev vapor deposition txoj kev, thiab cov deposition kub nyob ib ncig ntawm 500 ° C;
Raws li cov ntaub ntawv sib txawv ntawm cov khoom siv coated, cov cuab yeej coated tuaj yeem muab faib ua cov cuab yeej carbide coated, cov cuab yeej siv high-speed steel coated, thiab cov cuab yeej coated ntawm ceramics thiab superhard cov ntaub ntawv (pob zeb diamond thiab cubic boron nitride).
Raws li cov khoom siv txheej txheej, cov cuab yeej coated tuaj yeem muab faib ua ob pawg, uas yog cov cuab yeej "nyuaj" coated thiab 'mos' coated cov cuab yeej. Lub hom phiaj tseem ceeb ua raws li "nyuaj" cov cuab yeej coated yog cov hardness siab thiab hnav tsis kam Nws lub ntsiab zoo yog siab hardness thiab zoo hnav tsis kam, feem ntau yog TiC thiab TiN txheej. Lub hom phiaj ua los ntawm "mos" txheej txheej cov cuab yeej yog qhov sib txhuam coefficient qis, tseem hu ua cov cuab yeej lubricating tus kheej, uas kev sib txhuam nrog cov khoom siv ua haujlwm Cov coefficient tsawg heev, tsuas yog li 0.1, uas tuaj yeem txo qhov adhesion, txo kev sib txhuam, thiab txo kev txiav. quab yuam thiab txiav kub.
Nanocoating (Nanoeoating) cov cuab yeej txiav tsis ntev los no tau tsim. Cov cuab yeej coated no tuaj yeem siv sib txawv ntawm cov ntaub ntawv txheej (xws li hlau / hlau, hlau / ceramic, ceramic / ceramic, thiab lwm yam) kom ua tau raws li qhov sib txawv ntawm kev ua haujlwm thiab kev ua haujlwm. Tsim kom zoo nano-coatings tuaj yeem ua cov khoom siv muaj kev sib txhuam zoo-txo thiab tiv thaiv kev hnav thiab nws tus kheej-lubricating zog, ua rau lawv haum rau high-speed qhuav txiav.
⑵ Cov yam ntxwv ntawm cov cuab yeej coated
① Zoo txhua yam thiab kev ua haujlwm zoo: Cov cuab yeej coated muab cov khoom zoo ntawm cov khoom siv hauv paus thiab cov khoom siv txheej. Lawv tsis tsuas yog tuav lub zoo toughness thiab siab zog ntawm lub hauv paus khoom, tab sis kuj muaj lub siab hardness, siab hnav tsis kam thiab tsis tshua muaj kev sib txhuam coefficient. Yog li ntawd, kev txiav ceev ntawm cov cuab yeej coated tuaj yeem nce ntau dua 2 npaug ntawm cov cuab yeej uas tsis muaj coated, thiab cov nqi pub ntau dua tau tso cai. Lub neej ntawm cov cuab yeej coated kuj tseem txhim kho.
② Muaj zog versatility: Coated cov cuab yeej muaj dav versatility thiab ho nthuav cov kev ua ntau yam. Ib lub cuab yeej coated tuaj yeem hloov tau ntau yam cuab yeej uas tsis yog coated.
③ Txheej thickness: Raws li cov txheej thickness nce, lub cuab yeej lub neej kuj yuav nce, tab sis thaum lub txheej thickness mus txog saturation, lub cuab tam lub neej yuav tsis nce ho. Thaum lub txheej yog tuab heev, nws yuav yooj yim ua rau tev; Thaum cov txheej txheej nyias dhau lawm, qhov hnav tsis kam yuav tsis zoo.
④ Regrindability: Coated blades muaj tsis zoo regrindability, complex txheej txheej txheej txheem yuav tsum tau, thiab ntev txheej txheej.
⑤ Cov khoom siv txheej: Cov cuab yeej nrog cov khoom siv sib txawv muaj qhov sib txawv ntawm kev txiav. Piv txwv li: thaum txiav ntawm qis ceev, TiC txheej muaj qhov zoo; Thaum txiav ntawm kev kub ceev, TiN yog qhov tsim nyog dua.
⑶ Kev siv cov cuab yeej coated txiav
Cov cuab yeej coated muaj peev xwm zoo hauv kev ua haujlwm ntawm CNC machining thiab yuav yog cov cuab yeej tseem ceeb tshaj plaws hauv kev ua haujlwm ntawm CNC machining yav tom ntej. Txheej txheej tshuab tau siv rau qhov kawg mills, reamers, laum cov khoom, cov cuab yeej ua qhov sib xyaw, iav hobs, iav shaper cutters, iav shaving cutters, tsim broaches thiab ntau lub tshuab-clamped indexable inserts kom tau raws li ntau yam kev xav tau ntawm kev kub ceev txiav. Cov kev xav tau ntawm cov ntaub ntawv xws li steel thiab cam khwb cia hlau, tshav kub-resistant alloys thiab non-ferrous hlau.
5. Carbide cov khoom siv
Carbide tej cuab yeej, tshwj xeeb tshaj yog indexable carbide tej cuab yeej, yog cov khoom ntawm CNC machining cov cuab yeej. Txij li thaum xyoo 1980s, ntau yam ntawm ntau yam sib xyaw thiab indexable carbide txiav cov cuab yeej lossis cov ntxig tau nthuav dav rau ntau hom. Ntau yam ntawm cov cuab yeej txiav, uas cov cuab yeej ntsuas carbide tau nthuav dav los ntawm cov cuab yeej tig yooj yim thiab lub ntsej muag milling cutters mus rau ntau yam precision, complex, thiab tsim cov cuab yeej.
⑴ Hom carbide tej cuab yeej
Raws li cov tshuaj lom neeg muaj pes tsawg leeg, cemented carbide tuaj yeem muab faib ua tungsten carbide-based cemented carbide thiab titanium carbon (nitride) (TiC (N))-raws li cemented carbide.
Tungsten carbide-based cemented carbide suav nrog peb hom: tungsten cobalt (YG), tungsten cobalt titanium (YT), thiab tsawg carbide ntxiv (YW). Txhua tus muaj nws qhov zoo thiab qhov tsis zoo. Cov khoom tseem ceeb yog tungsten carbide (WC) thiab titanium carbide. (TiC), tantalum carbide (TaC), niobium carbide (NbC), thiab lwm yam. Cov txheej txheem siv hlau feem ntau yog Co.
Titanium carbon (nitride)-based cemented carbide yog cemented carbide nrog TiC ua cov khoom tseem ceeb (qee qhov ntxiv lwm cov carbides lossis nitrides). Feem ntau siv hlau sib txuas theem yog Mo thiab Ni.
ISO (International Organization for Standardization) faib txiav carbide ua peb pawg:
Chav K, suav nrog Kl0 ~ K40, sib npaug rau kuv lub teb chaws chav kawm YG (lub ntsiab lus tseem ceeb yog WC.Co).
P qeb, suav nrog P01 ~ P50, sib npaug rau kuv lub teb chaws qeb YT (lub ntsiab lus tseem ceeb yog WC.TiC.Co).
Chav kawm M, suav nrog M10 ~ M40, sib npaug rau kuv lub teb chaws YW chav kawm (cov khoom tseem ceeb yog WC-TiC-TaC(NbC)-Co).
Txhua qib sawv cev rau ntau cov alloys xws li kev nyuaj siab mus rau qhov siab tshaj plaws toughness nrog tus lej ntawm 01 thiab 50.
⑵ Kev ua tau zoo ntawm cov cuab yeej carbide
① High hardness: Carbide txiav cov cuab yeej yog ua los ntawm carbides siab hardness thiab melting point (hu ua nyuaj theem) thiab hlau binders (hu ua bonding theem) los ntawm hmoov metallurgy, nrog ib tug hardness ntawm 89 mus rau 93HRA. , ntau dua li high-speed steel. Ntawm 5400C, qhov hardness tseem tuaj yeem ncav cuag 82 ~ 87HRA, uas yog tib yam li cov hardness ntawm high-speed steel ntawm chav tsev kub (83 ~ 86HRA). Lub hardness tus nqi ntawm cemented carbide hloov nrog cov xwm, kom muaj nuj nqis, particle loj ntawm carbides thiab cov ntsiab lus ntawm cov hlau bonding theem, thiab feem ntau txo nrog qhov nce nyob rau hauv cov ntsiab lus ntawm cov hlau bonding theem. Thaum cov binder theem cov ntsiab lus zoo ib yam, qhov hardness ntawm YT alloys siab dua li ntawm YG alloys, thiab alloys ntxiv nrog TaC (NbC) muaj siab kub hardness.
② Bending zog thiab toughness: Lub zog dabtsi yog khoov ntawm feem ntau siv cemented carbide nyob rau hauv thaj tsam ntawm 900 txog 1500MPa. Qhov siab dua cov hlau binder theem cov ntsiab lus, qhov siab dua lub zog flexural. Thaum cov ntsiab lus binder zoo ib yam, lub zog ntawm YG hom (WC-Co) alloy yog siab dua li ntawm YT hom (WC-TiC-Co) alloy, thiab raws li cov ntsiab lus TiC nce, lub zog txo. Cemented carbide yog cov khoom siv nkig, thiab nws qhov cuam tshuam toughness ntawm chav tsev kub tsuas yog 1/30 txog 1/8 ntawm high-speed steel.
⑶ Kev siv cov cuab yeej carbide feem ntau siv
YG alloys feem ntau yog siv los ua cov hlau cam khwb cia, cov hlau tsis muaj hlau thiab cov khoom tsis yog hlau. Fine-grained cemented carbide (xws li YG3X, YG6X) muaj zog dua thiab hnav tsis kam tshaj li nruab nrab-grained carbide nrog tib cov ntsiab lus cobalt. Nws yog tsim rau kev ua ib co tshwj xeeb nyuaj cam khwb cia hlau, austenitic stainless hlau, tshav kub-resistant alloy, Titanium alloy, nyuaj bronze thiab hnav-resistant insulating cov ntaub ntawv, thiab lwm yam.
Qhov zoo tshaj plaws ntawm YT hom cemented carbide yog siab hardness, zoo tshav kub tsis kam, siab hardness thiab compressive zog ntawm qhov kub siab tshaj YG hom, thiab zoo oxidation kuj. Yog li ntawd, thaum rab riam yuav tsum muaj kev tiv thaiv tshav kub ntau dua thiab hnav tsis kam, qib nrog TiC cov ntsiab lus siab dua yuav tsum raug xaiv. YT alloys tsim nyog rau kev ua cov ntaub ntawv yas xws li hlau, tab sis tsis haum rau kev ua cov titanium alloys thiab silicon-aluminium alloys.
YW alloy muaj cov khoom ntawm YG thiab YT alloys, thiab muaj cov khoom zoo. Nws tuaj yeem siv los ua cov hlau, cam khwb cia hlau thiab cov hlau tsis muaj hlau. Yog tias cov ntsiab lus cobalt ntawm hom alloy no tsim nyog nce, lub zog tuaj yeem siab heev thiab tuaj yeem siv rau kev ua haujlwm ntxhib thiab cuam tshuam kev txiav ntawm ntau yam khoom siv tshuab nyuaj.
6. Kev kub ceev steel txiav cov cuab yeej
High Speed Steel (HSS) yog cov cuab yeej high-alloy steel uas ntxiv cov alloying ntau yam xws li W, Mo, Cr, thiab V. High-speed steel txiav cov cuab yeej muaj kev ua tau zoo heev ntawm lub zog, toughness thiab processability. Hauv cov cuab yeej txiav nyuaj, tshwj xeeb tshaj yog cov uas muaj cov hniav zoo nkauj xws li cov cuab yeej ua lub qhov, milling cutters, threading cov cuab yeej, broaching cov cuab yeej, iav txiav cov cuab yeej, thiab lwm yam., high-speed steel tseem siv. tuav ib txoj hauj lwm tseem ceeb. High-speed steel riam yog ib qho yooj yim rau sharpen los tsim ntse txiav npoo.
Raws li kev siv sib txawv, kev kub ceev steel tuaj yeem muab faib ua cov hom phiaj siab ceev steel thiab kev ua haujlwm siab ua haujlwm siab.
⑴ General-purpose high-speed steel tej cuab yeej
General hom phiaj kev kub ceev steel. Feem ntau, nws tuaj yeem muab faib ua ob pawg: tungsten steel thiab tungsten-molybdenum steel. Hom kev kub ceev no muaj 0.7% txog 0.9% (C). Raws li cov ntsiab lus sib txawv tungsten hauv cov hlau, nws tuaj yeem muab faib ua tungsten steel nrog W cov ntsiab lus ntawm 12% lossis 18%, tungsten-molybdenum steel nrog W cov ntsiab lus ntawm 6% lossis 8%, thiab molybdenum steel nrog W cov ntsiab lus ntawm 2% lossis tsis muaj W.. General-purpose high-speed steel muaj ib tug hardness (63-66HRC) thiab hnav tsis kam, siab zog thiab toughness, zoo plasticity thiab ua technology, yog li nws yog dav siv nyob rau hauv tsim ntau yam complex cov cuab yeej.
① Tungsten steel: Cov qib raug ntawm cov hom phiaj siab ceev steel tungsten steel yog W18Cr4V, (hu ua W18). Nws muaj kev ua tau zoo tag nrho. Qhov kub-kub hardness ntawm 6000C yog 48.5HRC, thiab tuaj yeem siv los tsim ntau yam cuab yeej nyuaj. Nws muaj qhov zoo ntawm kev sib tsoo zoo thiab tsis tshua muaj decarburization rhiab heev, tab sis vim nws cov ntsiab lus carbide siab, kev faib tsis sib luag, cov khoom loj, thiab tsis tshua muaj zog thiab toughness.
② Tungsten-molybdenum steel: yog hais txog lub siab ceev hlau tau los ntawm kev hloov ib feem ntawm tungsten hauv tungsten steel nrog molybdenum. Qib raug ntawm tungsten-molybdenum hlau yog W6Mo5Cr4V2, (hu ua M2). Cov carbide hais ntawm M2 yog qhov zoo thiab sib xws, thiab nws lub zog, toughness thiab high-temperature plasticity yog zoo dua li ntawm W18Cr4V. Lwm hom tungsten-molybdenum hlau yog W9Mo3Cr4V (W9 luv luv). Nws cov thermal stability yog me ntsis siab dua M2 steel, nws dabtsi yog khoov lub zog thiab toughness yog zoo dua W6M05Cr4V2, thiab nws muaj zoo processability.
⑵ Cov cuab yeej siv high-speed steel txiav
High-performance high-speed steel yog hais txog hom hlau tshiab uas ntxiv qee cov ntsiab lus carbon, vanadium cov ntsiab lus, thiab cov ntsiab lus alloying xws li Co thiab Al rau cov ntsiab lus ntawm cov hom phiaj siab ceev hlau, yog li txhim kho nws cov cua sov thiab hnav tsis kam. . Feem ntau muaj cov pawg hauv qab no:
① High carbon high speed steel. High-carbon high-speed steel (xws li 95W18Cr4V) muaj zog hardness ntawm chav tsev kub thiab kub. Nws yog tsim rau kev tsim thiab ua cov hlau zoo tib yam thiab cam khwb cia hlau, laum khoom, reamers, kais dej thiab milling cutters nrog siab hnav tsis kam, los yog cov cuab yeej rau kev ua cov ntaub ntawv nyuaj. Nws tsis tsim nyog los tiv thaiv kev cuam tshuam loj.
② High vanadium siab ceev hlau. Cov qib zoo, xws li W12Cr4V4Mo, (hu ua EV4), muaj V cov ntsiab lus nce mus rau 3% mus rau 5%, muaj kev hnav zoo, thiab tsim nyog rau kev txiav cov ntaub ntawv uas ua rau cov cuab yeej zoo hnav, xws li fibers, tawv roj hmab, yas , thiab lwm yam, thiab tseem tuaj yeem siv rau kev ua cov khoom siv xws li cov hlau tsis muaj steel, cov hlau muaj zog thiab cov hlau kub kub.
③ Cobalt kev kub ceev steel. Nws yog cobalt-muaj super-hard high-speed steel. Cov qib ib txwm, xws li W2Mo9Cr4VCo8, (hu ua M42), muaj hardness siab heev. Nws hardness tuaj yeem ncav cuag 69-70HRC. Nws yog tsim rau kev ua haujlwm nyuaj-rau-siv high-lub zog tshav kub-resistant steels, high-temperature alloys, titanium alloys, thiab lwm yam. Cov ntaub ntawv ua: M42 muaj zoo grindability thiab yog haum rau ua precision thiab complex cov cuab yeej, tab sis nws tsis haum. rau kev ua haujlwm nyob rau hauv kev cuam tshuam tej yam kev mob.
④ Aluminium siab ceev steel. Nws yog ib qho aluminium-muaj super-nyuaj high-speed steel. Cov qhab nia zoo yog, piv txwv li, W6Mo5Cr4V2Al, (hu ua 501). Qhov kub-kub hardness ntawm 6000C kuj mus txog 54HRC. Kev ua haujlwm txiav yog sib npaug rau M42. Nws yog tsim rau kev tsim milling cutters, laum khoom, reamers, iav cutters, thiab broaches. thiab lwm yam, siv rau kev ua cov ntaub ntawv xws li hlau alloy, stainless hlau, high-strength steel thiab high-temperature alloys.
⑤ Nitrogen super-hard high-speed steel. Cov qib ib txwm, xws li W12M03Cr4V3N, hu ua (V3N), yog nitrogen-muaj super-nyuaj high-speed steels. Lub hardness, lub zog, thiab toughness yog sib npaug rau M42. Lawv tuaj yeem siv los ua ib qho kev hloov pauv rau cobalt uas muaj cov hlau kub ceev thiab siv rau kev txiav qis ntawm cov khoom nyuaj rau tshuab thiab qis-ceev, high-precision steels. ua.
⑶ Smelting high-speed steel thiab hmoov metallurgy high-speed steel
Raws li cov txheej txheem kev tsim khoom sib txawv, cov hlau ceev ceev tuaj yeem muab faib ua cov hlau nrawm nrawm thiab hmoov metallurgy high-speed steel.
① Smelting high-speed steel: Ob qho tib si high-speed steel thiab high-speed steel yog tsim los ntawm txoj kev smelting. Lawv raug tsim los rau hauv riam los ntawm cov txheej txheem xws li smelting, ingot casting, thiab plating thiab dov. Ib qho teeb meem loj uas yooj yim tshwm sim thaum smelting high-speed steel yog carbide segregation. Hard thiab brittle carbides yog unevenly faib nyob rau hauv high-ceev steel, thiab cov nplej yog ntxhib (txog kaum ob ntawm microns), uas cuam tshuam rau hnav tsis kam thiab toughness ntawm high-speed steel cov cuab yeej. thiab tsis zoo cuam tshuam kev ua haujlwm txiav.
② Powder metallurgy high-speed steel (PM HSS): hmoov metallurgy high-speed steel (PM HSS) yog cov kua hlau smelted nyob rau hauv high-frequency induction rauv, atomized nrog high-pressure argon los yog ntshiab nitrogen, thiab ces quenched kom tau. zoo thiab uniform crystals. Cov qauv (cov hmoov nplej siab ceev), thiab tom qab ntawd nias cov hmoov nplej rau hauv ib rab riam nyob rau hauv qhov kub thiab txias, los yog ua ntej ua ib lub steel billet thiab ces forge thiab dov nws mus rau hauv ib tug riam. Piv nrog rau high-speed steel tsim los ntawm cov txheej txheem melting, PM HSS muaj qhov zoo uas cov carbide nplej zoo thiab zoo ib yam, thiab lub zog, toughness, thiab hnav tsis kam yog zoo dua piv rau cov melted high-speed steel. Hauv kev ua haujlwm ntawm cov cuab yeej CNC complex, PM HSS cov cuab yeej yuav txuas ntxiv txhim kho thiab tuav txoj haujlwm tseem ceeb. Cov qib zoo, xws li F15, FR71, GFl, GF2, GF3, PT1, PVN, thiab lwm yam, tuaj yeem siv los tsim cov khoom loj loj, hnyav-loaded, muaj kev cuam tshuam cov cuab yeej txiav, nrog rau cov cuab yeej txiav txiav.
Lub hauv paus ntsiab lus rau kev xaiv cov khoom siv CNC
Tam sim no, cov cuab yeej siv dav hauv CNC feem ntau suav nrog cov cuab yeej pob zeb diamond, cov cuab yeej cubic boron nitride, cov cuab yeej ceramic, cov cuab yeej coated, cov cuab yeej carbide, cov cuab yeej siv high-speed steel, thiab lwm yam. Cov lus hauv qab no qhia txog kev ua haujlwm tseem ceeb ntawm ntau yam khoom siv.
Cov cuab yeej siv rau CNC machining yuav tsum raug xaiv raws li cov khoom ua tiav thiab qhov ua tiav. Kev xaiv cov khoom siv cuab yeej yuav tsum ua kom haum nrog cov khoom siv. Kev sib piv ntawm cov cuab yeej cuab tam thiab cov khoom ua tiav feem ntau yog hais txog kev sib piv cov khoom siv kho tshuab, cov khoom siv lub cev thiab cov khoom siv tshuaj lom neeg ntawm ob qho kom tau txais cov cuab yeej siv lub neej ntev tshaj plaws thiab siab tshaj plaws txiav khoom.
1. Sib piv cov cuab yeej cuab tam ntawm cov cuab yeej txiav thiab cov khoom ua haujlwm
Qhov teeb meem ntawm kev sib piv cov cuab yeej cuab tam ntawm cov cuab yeej txiav thiab cov khoom ua haujlwm feem ntau yog hais txog kev sib txuam ntawm cov cuab yeej cuab tam xws li lub zog, toughness thiab hardness ntawm lub cuab yeej thiab cov khoom siv ua haujlwm. Cov cuab yeej siv nrog cov khoom siv sib txawv yog tsim rau kev ua cov ntaub ntawv sib txawv.
① Qhov kev txiav txim ntawm cov cuab yeej hardness yog: pob zeb diamond cuab tam> cubic boron nitride cuab tam> ceramic cuab tam> tungsten carbide> siab ceev steel.
② Qhov kev txiav txim ntawm dabtsi yog khoov lub zog ntawm cov khoom siv yog: high-speed steel> cemented carbide> ceramic cov cuab yeej> pob zeb diamond thiab cubic boron nitride cov cuab yeej.
③ Qhov kev txiav txim siab ntawm cov khoom siv yog: high-speed steel> tungsten carbide> cubic boron nitride, pob zeb diamond thiab cov cuab yeej ceramic.
High-hardness workpiece cov ntaub ntawv yuav tsum tau ua tiav nrog cov cuab yeej hardness siab dua. Lub hardness ntawm cov khoom siv yuav tsum siab tshaj qhov hardness ntawm cov khoom siv workpiece, uas feem ntau yuav tsum tau siab tshaj 60HRC. Qhov siab dua qhov hardness ntawm cov khoom siv, qhov zoo dua nws hnav tsis kam. Piv txwv li, thaum cov ntsiab lus cobalt nyob rau hauv cemented carbide nce, nws lub zog thiab toughness nce thiab nws hardness txo, ua rau nws haum rau ntxhib machining; Thaum cov ntsiab lus cobalt txo qis, nws hardness thiab hnav tsis kam nce, ua rau nws haum rau kev ua tiav.
Cov cuab yeej nrog cov cuab yeej kub kub zoo heev yog qhov tshwj xeeb tshaj yog tsim rau kev kub ceev txiav. Qhov kev ua tau zoo ntawm qhov kub thiab txias ntawm cov cuab yeej txiav ceramic ua rau lawv txiav ntawm qhov nrawm, thiab qhov tso cai txiav ceev tuaj yeem yog 2 txog 10 npaug siab dua li ntawm cov cemented carbide.
2. Sib piv cov khoom ntawm lub cev ntawm cov khoom siv txiav rau cov khoom siv machined
Cov cuab yeej nrog lub cev sib txawv, xws li cov cuab yeej siv high-speed steel nrog high thermal conductivity thiab qis melting point, ceramic cov cuab yeej nrog siab melting point thiab tsawg thermal expansion, pob zeb diamond cov cuab yeej muaj thermal conductivity thiab thermal expansion, thiab lwm yam. ua cov ntaub ntawv sib txawv workpiece. Thaum ua cov khoom ua haujlwm nrog cov thermal conductivity tsis zoo, cov khoom siv nrog cov thermal conductivity zoo dua yuav tsum tau siv kom cov cua sov tuaj yeem hloov mus sai sai thiab txiav qhov kub tuaj yeem txo. Vim nws cov thermal conductivity thiab thermal diffusivity, pob zeb diamond tau yooj yim dissipate tej tshav kub tsis ua rau thermal deformation loj, uas yog tshwj xeeb tshaj yog ib qho tseem ceeb rau precision machining cov cuab yeej uas yuav tsum tau high dimensional raug.
① Lub tshav kub tsis kam ntawm ntau yam khoom siv: cov cuab yeej pob zeb diamond yog 700 ~ 8000C, PCBN cov cuab yeej yog 13000 ~ 15000C, cov cuab yeej ceramic yog 1100 ~ 12000C, TiC (N)-raws li cemented carbide yog 900 ~ 11000C, WC-based ultra-fine Cov nplej Carbide yog 800 ~ 9000C, HSS yog 600 ~ 7000C.
② Qhov kev txiav txim ntawm thermal conductivity ntawm ntau yam khoom siv: PCD> PCBN> WC-raws li cemented carbide> TiC (N)-raws li cemented carbide> HSS> Si3N4-raws li ceramics> A1203-raws li ceramics.
③ Qhov kev txiav txim ntawm thermal expansion coefficients ntawm ntau yam khoom siv yog: HSS> WC-raws li cemented carbide> TiC(N)> A1203-raws li ceramic> PCBN> Si3N4-raws li ceramic> PCD.
④ Qhov kev txiav txim ntawm thermal shock tsis kam ntawm ntau yam khoom siv yog: HSS> WC-raws li cemented carbide> Si3N4-based ceramics> PCBN> PCD> TiC (N)-raws li cemented carbide> A1203-raws li ceramics.
3. Sib piv cov tshuaj lom neeg ntawm cov khoom siv txiav rau cov khoom siv machined
Qhov teeb meem ntawm kev sib piv cov khoom siv tshuaj ntawm cov cuab yeej txiav cov cuab yeej thiab cov khoom ua haujlwm feem ntau yog hais txog kev sib txuam ntawm cov khoom siv tshuaj lom neeg xws li tshuaj lom neeg, tshuaj lom neeg cov tshuaj tiv thaiv, diffusion thiab dissolution ntawm cov cuab yeej thiab cov khoom siv ua haujlwm. Cov cuab yeej nrog cov ntaub ntawv sib txawv yog tsim los ua cov khoom sib txawv ntawm cov khoom sib txawv.
① Kev sib txuas ntawm qhov kub thiab txias ntawm ntau yam khoom siv (nrog hlau) yog: PCBN>ceramic>tungsten carbide> HSS.
② oxidation kuj kub ntawm ntau yam khoom siv yog: ceramic> PCBN> tungsten carbide> pob zeb diamond> HSS.
③ Lub zog diffusion ntawm cov khoom siv (rau hlau) yog: pob zeb diamond> Si3N4-based ceramics> PCBN> A1203-raws li ceramics. Lub diffusion siv (rau titanium) yog: A1203-raws li ceramic> PCBN> SiC> Si3N4> pob zeb diamond.
4. Tsim nyog xaiv cov khoom siv CNC
Feem ntau hais lus, PCBN, cov cuab yeej ceramic, coated carbide thiab TiCN-based carbide cov cuab yeej tsim nyog rau CNC ua cov hlau ferrous xws li hlau; thaum PCD cov cuab yeej tsim nyog rau cov ntaub ntawv tsis-ferrous hlau xws li Al, Mg, Cu thiab lawv cov alloys thiab ua cov khoom tsis yog hlau. Cov lus hauv qab no teev qee cov khoom siv ua haujlwm uas cov khoom siv saum toj no tsim nyog rau kev ua haujlwm.
Xinfa CNC cov cuab yeej muaj cov yam ntxwv zoo thiab tus nqi qis. Yog xav paub ntxiv, thov mus saib:
Tuam Tshoj CNC cuab yeej Hoobkas thiab cov chaw muag khoom (xinfatools.com)
Post lub sij hawm: Nov-01-2023
