1 Txheej txheem cej luam
Cov thawv ntim loj loj muaj cov yam ntxwv xws li qhov ntev ntev, lub thawv ntim khoom, kev kub ceev, thiab qhov qhib loj, ua rau muaj kev ntxhov siab nyob rau hauv nruab nrab ntawm cov qauv ntawm lub nkoj. Yog li ntawd, loj-thickness high-strength steel cov ntaub ntawv yog feem ntau siv nyob rau hauv tsim.
Raws li txoj kev siv vuam zoo, ib leeg-xaim hluav taws xob roj ntsug vuam (EGW) tau siv dav. Txawm li cas los xij, feem ntau qhov siab tshaj plaws siv phaj tuab tuaj yeem ncav cuag 32 ~ 33mm, thiab tsis tuaj yeem siv rau saum daim hlau tuab tuab;
Cov phaj thickness ntawm ob-xaim EGW txoj kev yog feem ntau txog li 70 hli. Txawm li cas los xij, vim tias cov khoom siv hluav taws xob welding loj heev, kom ntseeg tau tias qhov kev ua tau zoo ntawm kev sib koom ua tau raws li cov kev cai tshwj xeeb, cov phaj hlau uas tsim nyog rau kev siv cov khoom siv hluav taws xob siab yuav tsum tau siv.
Yog li ntawd, tsis siv cov welded steel daim hlau uas tuaj yeem hloov mus rau cov khoom siv hluav taws xob loj, txoj hlua ntsug vuam ntawm cov phaj loj thiab tuab tuaj yeem tsuas yog siv FCAW ntau txheej txheej ntau dhau vuam, thiab vuam efficiency tsawg.
Txoj kev no yog FCAW + EGW ua ke cov txheej txheem vuam txheej txheem tsim raws li cov yam ntxwv saum toj no uas tuaj yeem siv tsis tau tsuas yog siv EGW rau vuam ntawm daim hlau loj, muab kev ua si tag nrho rau nws cov txiaj ntsig zoo, tab sis kuj hloov mus rau cov yam ntxwv ntawm daim hlau tiag. . Ntawd yog, txoj kev sib txuas ua haujlwm tau zoo uas siv FCAW ib leeg-ib sab vuam rau ntawm cov qauv txheej txheem kom ua tiav rov qab sib sau, thiab tom qab ntawd ua EGW vuam ntawm qhov tsis muaj txheej txheem.
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2 Cov ntsiab lus tseem ceeb ntawm FCAW + EGW ua ke vuam txoj kev
(1) Siv phaj thickness
34 ~ 80mm: Qhov ntawd yog, qhov txwv qis yog qhov txwv sab sauv ntawm cov phaj tuab siv rau monofilament EGW; Raws li kev txwv sab saud, tam sim no lub nkoj loj loj siv cov phaj loj-thickness steel rau sab hauv thiab sab saum toj plhaub strke daim hlau. Xav tias qhov tuab ntawm cov hlau phaj ntawm cov khoom sib txawv yog qhov sib txawv, nws tau txiav txim siab yog 80mm.
(2) Thickness faib
Lub hauv paus ntsiab lus ntawm kev faib welding thickness yog muab tag nrho cov kev ua si rau qhov ua tau zoo ntawm EGW vuam; Nyob rau tib lub sijhawm, peb yuav tsum coj mus rau hauv tus account tias tus nqi ntawm cov khoom siv hlau vuam ntawm ob txoj kev yuav tsum tsis txhob sib txawv ntau dhau, txwv tsis pub nws yuav nyuaj rau kev tswj cov vuam deformation.
(3) Kev sib koom ua ke vuam txoj kev sib koom ua ke tsim qauv
① Groove lub kaum sab xis: Txhawm rau kom tsis txhob muaj qhov dav dav ntawm FCAW sab, qhov zawj yog qhov tsim nyog me dua li qhov qub FCAW ib sab vuam zawj, uas yog nyias phaj thicknesses yuav tsum tau sib txawv bevel kaum. Thaum lub phaj thickness yog 30 ~ 50 hli, nws yog Y ± 5 °, thiab thaum lub phaj thickness yog 51 ~ 80 hli, nws yog Z ± 5 °.
② Kev sib txawv hauv paus: Nws yuav tsum tau hloov mus rau cov txheej txheem ntawm ob txoj kev vuam tib lub sijhawm, uas yog, G ± 2mm.
③Applicable gasket daim ntawv: Pa daim duab peb sab gaskets tsis tau raws li cov saum toj no cov ntaub ntawv uas yuav tsum tau vim yog lub kaum sab xis teeb meem. Txoj kev sib xyaw ua ke no yuav tsum tau siv cov khoom siv sib txuas. Qhov loj ntawm txoj kab uas hla yuav tsum tau xaiv raws li qhov tseeb sib dhos tus nqi (saib daim duab 1).
(4) Cov ntsiab lus tseem ceeb ntawm kev siv vuam
① Kev cob qhia vuam. Cov neeg ua haujlwm yuav tsum tau mus rau ib lub sijhawm ntawm kev cob qhia. Txawm tias cov neeg ua haujlwm uas muaj kev paub dhau los hauv EGW (SG-2 txoj kev) vuam ntawm cov tuab tuab tuab tuab yuav tsum tau txais kev cob qhia, vim tias kev khiav hauj lwm ntawm cov vuam hlau nyob rau hauv lub pas dej molten sib txawv thaum vuam nyias daim hlau thiab cov phaj tuab loj.
② Xaus kev tshawb nrhiav. Kev kuaj tsis muaj kev puas tsuaj (RT lossis UT) yuav tsum tau siv qhov kawg ntawm qhov vuam thiab qhov arc nres ib feem los xyuas qhov tsis xws luag thiab paub meej tias qhov loj ntawm qhov tsis xws luag. Gouging yog siv los tshem tawm qhov tsis xws luag, thiab FCAW los yog SMAW vuam txoj kev siv rau rework vuam.
③ Arc striking phaj. Lub arc tawm tsam phaj ntev yuav tsum yog tsawg kawg 50mm. Lub arc striking phaj thiab cov khoom siv hauv paus muaj tib lub thickness thiab muaj tib qhov zawj. ④ Thaum lub sij hawm vuam, cua yuav ua rau muaj kev cuam tshuam ntawm lub shielding gas, ua rau lub pore tsis xws luag nyob rau hauv lub weld, thiab intrusion ntawm nitrogen nyob rau hauv cov huab cua yuav ua rau tsis zoo sib koom ua hauj lwm, yog li tsim nyog yuav tsum tau kev tiv thaiv cua.
3 Cov txheej txheem kuaj thiab kev pom zoo
(1) Cov ntaub ntawv xeem
Cov ntawv xeem thiab cov khoom siv vuam yog qhia hauv Table 1
(2) Welding parameters
Lub vuam txoj hauj lwm yog 3G, thiab qhov tshwj xeeb vuam tsis muaj nyob rau hauv Table 2.
(3) Cov ntawv xeem
Qhov kev ntsuam xyuas tau ua raws li LR thiab CCS cov kev cai nkoj nkoj thiab nyob rau ntawm qhov chaw saib xyuas los ntawm tus neeg soj ntsuam. Cov txiaj ntsig tau raws li hauv qab no.
NDT thiab cov txiaj ntsig: PT cov txiaj ntsig yog tias cov npoo ntawm lub hauv ntej thiab nraub qaum welds zoo huv si, nto yog du, thiab tsis muaj qhov tsis xws luag; UT cov txiaj ntsig yog tias tag nrho cov welds tsim nyog tom qab kuaj ultrasonic (kev sib ntsib ISO 5817 qib B); MT cov txiaj ntsig yog tias cov welds pem hauv ntej thiab nraub qaum yog qhov sib nqus particle qhov tsis zoo tom qab kev tshuaj xyuas, tsis muaj qhov chaw vuam tsis zoo.
(4) Txais qhov xaus
Tom qab NDT thiab kev ntsuam xyuas cov khoom siv kho tshuab tau ua tiav ntawm qhov kev sim welded pob qij txha, cov txiaj ntsig tau ua raws li qhov yuav tsum tau ua ntawm kev faib tawm hauv zej zog cov kev qhia tshwj xeeb thiab dhau qhov kev pom zoo.
(5) Kev sib piv ua haujlwm zoo
Siv 1m ntev weld ntawm ib lub phaj ua piv txwv, lub sijhawm vuam yuav tsum muaj rau ob sab FCAW vuam yog 250 feeb; Thaum siv txoj kev vuam sib xyaw ua ke, lub sijhawm vuam xav tau rau EGW yog 18 feeb, thiab lub sijhawm vuam xav tau rau FCAW yog 125 feeb, thiab lub sijhawm vuam tag nrho yog 143 feeb. Txoj kev sib xyaw ua ke txuag tau ze li ntawm 43% ntawm lub sijhawm vuam piv rau thawj ob sab FCAW vuam.
4 Kev xaus
FCAW + EGW ua ke vuam txoj kev tsim kev sim tsis tsuas yog siv tag nrho cov txiaj ntsig ntawm kev ua haujlwm siab ntawm EGW vuam, tab sis kuj hloov mus rau cov yam ntxwv tam sim no ntawm cov hlau phaj. Nws yog ib tug tshiab welding txheej txheem technology nrog high welding efficiency thiab siab feasibility.
Raws li cov txheej txheem vuam thev naus laus zis tshiab, nws cov zawj ntau lawm, kev sib dhos raug, xaiv cov khoom siv, vuam tsis, thiab lwm yam yog qhov tseem ceeb thiab yuav tsum tau tswj nruj me ntsis thaum siv.
Post lub sij hawm: Feb-22-2024
