Vuam txheej txheem specification rau hluav taws xob soldering hlau
1) Fusion vuam
Fusion welding yog ib txoj hauv kev ua kom sov lub workpiece interface mus rau lub xeev molten thaum lub vuam txheej txheem, thiab ua tiav cov vuam yam tsis siv lub siab. Thaum lub sij hawm fusion welding, lub tshav kub kub sai sai thiab melts lub interface ntawm ob workpieces yuav tsum tau welded, tsim ib tug molten pas dej ua ke. Lub pas dej molten txav mus rau pem hauv ntej nrog lub tshav kub thiab tsim ib qho txuas txuas ntxiv tom qab txias, txuas ob lub workpieces rau hauv ib qho.
Thaum lub sij hawm fusion vuam txheej txheem, yog tias cov cua nkag mus rau hauv kev sib cuag ncaj qha nrog lub pas dej kub kub, cov pa oxygen hauv cov cua yuav oxidize hlau thiab ntau yam hlau alloy. Nitrogen, dej vapor, thiab lwm yam khoom nyob rau hauv cov huab cua nkag mus rau hauv lub pas dej ua ke, thiab thaum lub sij hawm tom ntej txias txheej txheem, xws li pores, slag inclusions, thiab tawg yog tsim nyob rau hauv weld seam, deteriorating qhov zoo thiab kev ua tau zoo ntawm weld seam.
Txhawm rau txhim kho vuam zoo, ntau yam kev tiv thaiv tau tsim. Piv txwv li, gas shielded arc vuam siv cov pa roj xws li argon thiab carbon dioxide los cais cov cua, thiaj li tiv thaiv lub arc thiab molten pas dej ua ke thaum vuam; Piv txwv li, thaum welding hlau, ntxiv titanium hlau hmoov nrog siab oxygen affinity rau electrode txheej rau deoxygenation tuaj yeem tiv thaiv cov khoom muaj txiaj ntsig xws li manganese thiab silicon hauv electrode los ntawm oxidation thiab nkag mus rau hauv lub pas dej molten. Tom qab txias, cov welds zoo tuaj yeem tau txais.
2) Siab vuam
Kev kub siab vuam yog cov txheej txheem ntawm kev ua tiav atomic bonding ntawm ob lub workpieces nyob rau hauv ib tug khoom lub xeev nyob rau hauv lub siab tej yam kev mob, kuj hu ua solid-state welding. Cov txheej txheem kev siv lub siab welding feem ntau yog cov pob tw vuam. Thaum tam sim no dhau los ntawm kev sib txuas kawg ntawm ob lub workpieces, qhov kub thiab txias nce vim qhov ua haujlwm siab. Thaum rhuab mus rau ib lub xeev yas, nws txuas nrog nyob rau hauv axial siab los ua ib tug tag nrho.
Qhov zoo tshaj plaws ntawm ntau txoj kev vuam siab yog siv lub zog thaum lub vuam txheej txheem tsis ntxiv cov khoom muab tub lim. Feem ntau cov txheej txheem vuam, xws li diffusion vuam, vuam vuam ntau zaus, thiab txias siab vuam, tsis muaj cov txheej txheem melting, yog li tsis muaj teeb meem ntawm cov khoom siv hluav taws xob muaj txiaj ntsig kub hnyiab thiab cov khoom tsis zoo nkag mus rau hauv vuam seam, uas yooj yim rau vuam. txheej txheem thiab txhim kho vuam kev nyab xeeb thiab huv si. Lub caij no, vim qhov ntsuas kub qis dua thiab lub sijhawm cua sov luv dua piv rau fusion vuam, qhov kub cuam tshuam rau thaj tsam me me. Ntau cov ntaub ntawv uas nyuaj rau welding nrog fusion welding feem ntau tuaj yeem welded rau hauv cov pob qij txha zoo nrog tib lub zog raws li cov khoom siv hauv paus uas siv lub siab vuam.
3) Brazing
Brazing yog ib txoj hauv kev siv cov khoom siv hlau nrog qhov qis qis dua qhov chaw ua haujlwm ua cov khoom siv brazing, cua sov lub workpiece thiab cov khoom siv brazing kom kub siab tshaj lossis qis dua qhov melting point ntawm workpiece, ntub lub workpiece nrog kua brazing khoom, filling qhov sib txawv interface, thiab ua tiav atomic diffusion nrog lub workpiece, yog li ua tiav vuam.
Qhov sib koom ua ke tsim thaum lub sij hawm vuam uas txuas ob lub cev sib txuas yog hu ua weld seam. Ob sab ntawm lub vuam seam yog raug rau vuam thaum lub sij hawm vuam, ua rau muaj kev hloov hauv microstructure thiab cov khoom. Thaj chaw no yog hu ua tshav kub cuam tshuam. Thaum vuam, vim qhov sib txawv ntawm cov khoom siv ua haujlwm, cov khoom siv vuam, vuam tam sim no, thiab lwm yam, overheating, embrittlement, hardening, los yog softening yuav tshwm sim nyob rau hauv weld seam thiab tshav kub cuam tshuam cheeb tsam tom qab welding, uas kuj yuav ua rau ib tug txo nyob rau hauv kev ua tau zoo. ntawm weldment thiab deteriorate nws weldability. Qhov no yuav tsum tau kho lub vuam tej yam kev mob. Preheating ntawm qhov sib txuas ntawm qhov welded ua ntej vuam, rwb thaiv tsev thaum vuam, thiab tom qab vuam kev kho cua sov tuaj yeem txhim kho qhov vuam zoo ntawm qhov welded.
