Hauv kev txiav hlau, cov cuab yeej txiav tau ib txwm raug hu ua cov hniav ntawm kev tsim khoom, thiab kev ua haujlwm ntawm cov khoom siv txiav yog ib qho tseem ceeb ntawm kev txiav txim siab nws cov kev tsim khoom, cov nqi tsim khoom thiab kev ua haujlwm zoo. Yog li ntawd, kev xaiv kom raug ntawm cov khoom siv txiav yog qhov tseem ceeb heev.
Cov khoom siv yog hais txog cov khoom ntawm qhov txiav ntawm lub cuab yeej.
Tshwj xeeb, kev xaiv tsim nyog ntawm cov cuab yeej siv cuam tshuam rau cov hauv qab no:
Machining productivity, cuab yeej durability, cuab yeej siv thiab machining nqi, machining raug thiab nto zoo.
Nws feem ntau ntseeg tau tias cov cuab yeej cuab tam muaj xws li cov cuab yeej carbon steel, alloy cuab yeej steel, high-speed steel, nyuaj alloy, ceramics, cermets, pob zeb diamond, cubic boron nitride, thiab lwm yam.
Cermet yog cov khoom sib xyaw
Cermet
Cermet lus Askiv lo lus cermet los yog cermet yog tsim los ntawm ceramic (ceramic) thiab hlau (hlau). Cermet yog ib hom khoom sib xyaw, thiab nws cov ntsiab lus txawv me ntsis nyob rau lub sijhawm sib txawv.
(1) Qee qhov txhais tau tias yog cov khoom tsim los ntawm ceramics thiab hlau, lossis cov khoom sib xyaw ntawm ceramics thiab hlau ua los ntawm hmoov metallurgy.
American ASTM Professional Committee txhais nws li: cov khoom siv sib xyaw ua ke ntawm cov hlau lossis hlau thiab ib lossis ntau theem ceramic, tom kawg uas suav txog li 15% mus rau 85% ntim feem, thiab ntawm qhov kev npaj kub, Lub solubility ntawm lub hlau thiab ceramic theem yog me me.
Cov ntaub ntawv ua los ntawm cov hlau thiab ceramic raw cov ntaub ntawv muaj qee qhov zoo ntawm ob qho tib si hlau thiab ceramics, xws li lub toughness thiab dabtsi yog khoov tsis kam ntawm lub qub, thiab kub kub kuj, siab zog thiab oxidation kuj ntawm lub tom kawg.
(2) Cermet yog cov cemented carbide nrog titanium-raws li cov khoom nyuaj ua lub cev tseem ceeb. Lub npe lus Askiv ntawm cermet, cermet, yog kev sib txuas ntawm ob lo lus ceramic (ceramic) thiab hlau (hlau). Ti (C, N) nce qhov hnav tsis kam ntawm qib, qhov nyuaj thib ob ua rau muaj qhov tsis zoo rau cov yas deformation, thiab cov ntsiab lus cobalt tswj qhov toughness. Cermets nce hnav tsis kam thiab txo qhov nyiam lo rau lub workpiece piv rau sintered carbide.
Ntawm qhov tod tes, nws kuj muaj lub zog compressive tsawg thiab tsis zoo thermal shock kuj. Cermets txawv ntawm cov alloys nyuaj uas lawv cov khoom nyuaj yog nyob rau hauv WC system. Cermets yog tsim los ntawm Ti-based carbides thiab nitrides, thiab tseem hu ua Ti-based cemented carbides.
Generalized cermets kuj muaj xws li refractory compound alloys, hard alloys, thiab hlau-bonded pob zeb diamond cuab yeej cov ntaub ntawv. Ceramic theem nyob rau hauv cermets yog ib tug oxide los yog refractory compound nrog siab melting point thiab siab hardness, thiab cov hlau theem yog feem ntau hloov cov ntsiab lus thiab lawv alloys.
Cermet yog ib hom khoom sib xyaw, thiab nws cov ntsiab lus txawv me ntsis nyob rau lub sijhawm sib txawv.
Cermets yog cov cuab yeej txiav hlau
cov khoom tseem ceeb
Cermets tab tom hloov kho
Nws feem ntau ntseeg hais tias cov cuab yeej cuab tam muaj xws li cov cuab yeej carbon steel, alloy cuab yeej steel, high-speed steel, cemented carbide, cermet, ceramics, pob zeb diamond, cubic boron nitride, thiab lwm yam.
Nyob rau xyoo 1950, TiC-Mo-Ni cermets tau xub siv los ua cov khoom siv rau kev kub ceev precision txiav hlau.
Thaum xub thawj cermets tau tsim los ntawm TiC thiab npib tsib xee. Txawm hais tias nws muaj zog thiab siab hardness piv rau cemented carbide, nws cov toughness kuj tsis zoo.
Xyoo 1970, TiC-TiN-based cermets, nickel-free cermets tau tsim.
Cov cermet niaj hnub no, nrog cov titanium carbonitride Ti (C, N) hais raws li lub ntsiab tivthaiv, ib tug me me ntawm lub thib ob nyuaj theem (Ti, Nb, W) (C, N) thiab tungsten-cobalt-nplua nuj binder, txhim kho cov hlau. toughness ntawm ceramics txhim kho lawv cov kev ua tau zoo, thiab txij li ntawd los cermets tau nce siv hauv kev txhim kho cov cuab yeej.
Nrog nws cov cua sov ua haujlwm zoo heev, hnav tsis kam thiab tshuaj lom neeg ruaj khov, cov cuab yeej cermet tau pom qhov zoo sib xws hauv kev kub ceev txiav thiab txiav cov ntaub ntawv nyuaj-rau-tshuab.
Cermet + PVD txheej txhim kho kev hnav tsis kam
yav tom ntej
Daim ntawv thov ntawm riam cermet nyob rau hauv ntau qhov chaw yog nce zuj zus nyob rau hauv ib hnub, thiab tsis muaj kev tsis ntseeg tias kev lag luam cermet yuav tsim ntxiv.
Cermets kuj tuaj yeem coated nrog PVD rau kev txhim kho hnav tsis kam.
Post lub sij hawm: Feb-08-2023
