Hauv kev lag luam lag luam thiab cov khoom siv, tooj tau dav siv rau nws cov hluav taws xob zoo, thermal conductivity thiab devility. Txawm li cas los xij, ib lo lus nug uas tau ua cov kws qhia ntawv ntev heev yog: Vim li cas tus tooj liab nyuaj rau Weld, lossis txawm hais tias "tsis xaiv" hauv qee qhov xwm txheej? Qhov tshwm sim no tsis yog vim muaj kev txwv ib leeg tab sis yog rooted hauv lub cev lossis tshuaj lom neeg ntawm cov nyom rau cov txheej txheem vuam.
Cov tub ntxhais muaj laj thawj rau Copper txoj kev sib tw
Tooj liab txoj kev sib tw qia los ntawm nws cov yam ntxwv intrinsic, uas ncaj qha cuam tshuam rau kev ruaj ntseg ntawm cov txheej txheem vuam thiab qhov zoo ntawm welded sib koom ua ke:
High thermal conductivity coj los ua kom sov
Tooj liab tau muaj siab heev thermal conductivity -}} txog 5 txog 10 zaug ntawm cov hlau. Thaum lub sij hawm vuam, cov cua sov tsim los ntawm arc lossis nplaim tawg tau sai sai los ntawm cov tooj liab los ntawm qhov chaw vuam kom ncav cuag lub suab nrov. This Fog rau cov neeg ua kom muaj zog los siv cov kev pheej hmoo siab dua tshiab lossis nthuav dav kev pheej hmoo ntawm kev deformation nyob rau hauv cov khoom siv hauv paus thiab nthuav tawm cov cua sov- cuam tshuam cheeb tsam.
Oxidation yog nquag tshwm sim thaum muaj kub
Thaum tooj liab tau ua kom muaj zog saum toj 300 degree, nws reacts yooj yim nrog oxygen tau yooj yim nrog cov pa taws rau hauv cov pa tooj liab oxide (cuo lossis cu₂o). Cov oxides muaj cov ntsiab lus zoo melting siab thiab yog tias lawv nyob twj ywm hauv Weld, lawv yuav txo qis lub zog thiab nruj ntawm welded sib koom tes. Tsis zoo li metrals xws li stainless hlau, uas ua ib qho yeeb yaj kiab dense los tiv thaiv kev ua kom muaj oxidation ntxiv, tooj liab oxides tsis tuaj yeem tiv thaiv cov khoom siv hauv paus.
Hydrogen embrittlement phom sij
Tooj liab muaj lub zog muaj zog los nqus cov hydrogen ntawm qhov kub. Thaum lub sij hawm vuam, yog tias qhov chaw av vuam (xws li cov av noo hauv huab cua) lossis cov chaw ua haujlwm vuam), cov hydrogen yuav yaj mus rau hauv lub tooj liab molten. Thaum lub weld txias thiab solidifies, lub solubility ntawm hydrogen hauv tooj liab txo qis qis, thiab hydrogen yuav precipate nyob rau hauv daim ntawv ntawm bubbles. Cov npuas no yuav nyob hauv Weld uas yog qhov hws, lossis ua rau hydrogen embrittlement thiab txo cov tawv ntawm kev sib koom tes.
Puas yog tooj liab tiag tiag "tsis muaj tseeb"?
Nws yuav tsum tau qhia tias "tooj liab nyuaj rau Weld" tsis txhais tau tias "tooj liab tsis tuaj yeem welded". Nrog rau kev txhim kho ntawm vuam thev naus laus zis, cov kev daws teeb meem tau tsim rau cov kev sib tw saum toj no:
- Kev Vuam Tshwj Xeeb: Tig Vuam (Tungsten Inert Roj Vuam) Nrog Kev Kub Siab Tam Sim No thiab Kev Siv Rau Cov Qauv Vuam Vuam. Cov mem tes tam sim no muaj peev xwm mloog zoo rau cua sov hauv lub sijhawm luv luv, txo cov cua sov los ntawm thermal conductivity. Brazing kuj tseem yog ib qho kev xaiv - los ntawm kev siv cov teeb meem brazing tsis xav tau, zam kev nqus cov teeb meem thaum siab- kub yaj.
- Kev tiv thaiv nruj heev: hauv lub tsev liab vuam, siab li ntawm Argon) yog siv rau kev tiv thaiv muaj zog cais tawm ntawm cov huab cua thiab tiv thaiv oxidation. Txhawm rau kom tuab cov tooj liab, preheating ua ntej vuam kuj tseem yuav tsum txo qhov kub thiab txias, qeeb qeeb poob, thiab ua kom muaj dej sov qeeb ntawm Molten.
- Cov khoom siv pretreatment: ua ntej vuam muag, tooj liab yuav tsum tau muab ntxuav kom huv si kom tshem tawm cov roj txhuas kom huv si, roj ntau zuj zus, txo qhov tsis xws luag. Vuam cov ntaub ntawv (xws li vuam siv xov hlau) kuj yuav tsum tau qhuav kom tsis txhob qhia ntau yam hydrogen.
Qhov Tseem Ceeb Ntawm Kev Ua Liaj kov cov xov tooj liab vuam
Tooj liab tau dav siv nyob rau hauv lub zog tshuab, khoom siv tub yees, khoom siv hluav taws xob, Cheebtsam hluav taws xob thiab lwm thaj chaw. Piv txwv li, hauv kev sib kis, tooj liab busebars yuav tsum tau txuas los ntawm vuam; Hauv lub tsheb thauj khoom tshiab tshiab, tooj liab txias rau vuam kom ua tiav kub disspation. Kev kov yeej cov tub tooj liab vuam nyuaj yog qhov tseem ceeb los ua kom ntseeg tau txoj kev ntseeg tau thiab kev nyab xeeb ntawm cov khoom tseem ceeb no.
Tam sim no, kev siv vuam cov khoom siv thiab cov chaw tshawb fawb tau txuas ntxiv los ua cov txheej txheem vuam ua kom zoo. Piv txwv li, qee yam kev lag luam tau tsim tsa laser vuam tshuab tshwj xeeb tsim rau cov nqaj kub - qhov kub txwv ib puag ncig, thiab txhim kho vuam ua haujlwm thiab ua tau zoo.
Hauv kev xaus, cov lus nug "vim li cas tsis tooj liab yuav welded?" yeej tseem ceeb qhia txog cov kev cov kev sib tw ua tiav coj los ntawm cov khoom ntiag tug ntawm tooj liab. Nrog kev nce qib ntawm kev siv thev naus laus zis, cov kev sib tw no tau txais maj mam kov yeej. Nkag siab cov hauv paus ua rau tooj liab lub vuam nyuaj tsis tsuas yog pab txhawb kev ua haujlwm ntawm kev ua haujlwm zoo dua qub hauv lub neej yav tom ntej. Raws li muaj kev thov rau high -}}}}}}}}} Vuam, tooj liab vuam thev naus laus zis yuav yog qhov chaw loj dua.
