tsoos hlau hlua welding
Cov txheej txheem ntawm kev siv cov hlua khi ib txwm muaj xws li: fusion vuam, fiber ntau vuam, thiab vuam siab.
1) Fusion welding yog ib txoj hauv kev uas lub workpiece interface yog rhuab mus rau lub xeev molten thaum lub sij hawm vuam txheej txheem, thiab welding tiav tsis muaj siab. Thaum lub sij hawm fusion welding, lub tshav kub kub sai sai thiab melts lub interface ntawm ob workpieces yuav tsum tau welded los ua ib tug molten pas dej ua ke. Lub pas dej molten txav mus rau pem hauv ntej nrog lub tshav kub, thiab tom qab txias, ib qho txuas txuas txuas mus rau ob lub workpieces rau hauv ib qho. Vim tias tom qab fusion welding, cov hlua khi hlua khi tau sib xyaw ua ke hauv fusion bud zoo los ua ib qho kev sib tsoo, thiab qhov kev tiv thaiv yog qhov loj, uas txo cov kev pab cuam lub neej ntawm cov hlua hlau. Thiab nyob rau hauv cov txheej txheem fusion welding, yog tias huab cua nyob rau hauv kev sib cuag ncaj qha nrog lub siab -kub molten pas dej ua ke, cov pa oxygen nyob rau hauv cov huab cua yuav oxidize hlau thiab ntau yam alloying ntsiab. Nitrogen, dej vapor, thiab lwm yam nyob rau hauv cov huab cua nkag mus rau hauv lub molten pas dej ua ke, thiab kuj tsim defects xws li pores, slag inclusions, thiab tawg nyob rau hauv lub weld thaum lub sij hawm tom ntej txias txheej txheem, deteriorating qhov zoo thiab kev ua tau zoo ntawm lub weld.
2) Brazing yog siv cov khoom siv hlau uas muaj qhov qis qis dua qhov chaw ua haujlwm raws li cov khoom siv ua haujlwm, ua kom sov lub workpiece thiab cov solder kom kub siab tshaj qhov melting point ntawm lub solder thiab qis dua lub melting point ntawm lub workpiece. kua nplaum kom ntub lub workpiece, sau qhov sib txawv interface thiab txuas nrog lub workpiece. Lub workpiece paub qhov sib txawv ntawm cov atoms, yog li paub txog txoj kev vuam.
Lub seam tsim thaum lub sij hawm vuam los txuas ob lub cev txuas yog hu ua weld. Ob sab ntawm lub vuam yuav raug vuam thaum lub sij hawm vuam, thiab cov qauv thiab cov khoom yuav hloov. Thaj chaw no yog hu ua tshav kub- thaj chaw 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 vuam thiab tshav kub- cuam tshuam cheeb tsam tom qab vuam, uas kuj txo cov kev ua tau zoo ntawm weldment thiab deteriorates lub weldability. Qhov no yuav tsum tau hloov kho ntawm vuam tej yam kev mob. Preheating ntawm qhov sib txuas ntawm cov vuam ua ntej vuam, kev txuag hluav taws xob thaum vuam thiab tom qab- vuam cua sov tuaj yeem txhim kho qhov vuam zoo ntawm cov vuam.
3) Kev kub siab vuam yog ua kom ob lub workpieces ua tiav atomic bonding nyob rau hauv lub xeev ruaj khov nyob rau hauv siab, tseem hu ua solid state welding. Cov txheej txheem kev siv lub siab welding feem ntau yog cov pob tw vuam. Thaum cov tam sim no dhau los ntawm kev sib txuas kawg ntawm ob lub workpieces, qhov kub thiab txias ntawm qhov chaw nce siab vim qhov loj tsis kam. Thaum rhuab mus rau ib lub xeev yas, qhov kev sib txuas ua ib qho ntawm qhov kev txiav txim ntawm axial siab.
Ib qho tshwj xeeb ntawm ntau txoj kev vuam siab yog kev siv lub siab yam tsis muaj cov khoom muab tub lim thaum lub sij hawm vuam txheej txheem. Feem ntau cov txheej txheem vuam siab, xws li diffusion vuam, vuam zaus vuam, txias siab vuam, thiab lwm yam., tsis muaj txheej txheem melting, yog li tsis muaj kev kub hnyiab ntawm cov khoom siv hlau zoo li fusion vuam, thiab cov teeb meem ntawm cov khoom tsis zoo cuam tshuam rau hauv cov txheej txheem. weld, yog li simplifying txheej txheem vuam. Txhim kho vuam kev nyab xeeb thiab kev nyiam huv. Nyob rau tib lub sijhawm, vim tias cov cua kub kub qis dua li ntawm fusion vuam thiab lub sij hawm cua sov yog luv dua, qhov kub ntawm qhov cuam tshuam yog me me. Ntau cov ntaub ntawv uas nyuaj rau vuam los ntawm fusion vuam feem ntau tuaj yeem welded rau hauv siab - cov pob qij txha zoo nrog lub zog tib yam li cov hlau hauv paus los ntawm kev vuam siab.
Nyob rau hauv cov ntsiab lus, siab vuam yuav inevitably hloov fusion vuam thiab fiber ntau vuam raws li cov txheej txheem tseem ceeb ntawm hlau hlua vuam.
