Thaum lub sij hawm vuam txheej txheem ntawmsteel qauv bolts, vim qhov tsis sib xws ntawm cov cua sov thiab cua txias, nrog rau cov kev txwv ntawm cov khoom siv nws tus kheej lossis cov kev txwv sab nraud, tom qab kev ua haujlwm vuam ua tiav, vuam kev ntxhov siab yuav ib txwm tsim nyob rau hauv cov khoom siv. Lub hav zoov ntawm vuam kev nyuaj siab yuav txo tau qhov tseeb bearing peev xwm ntawm welded pob qij txha thiab tsim yas deformation. Thaum lub vuam kev ntxhov siab hnyav, nws tseem yuav ua rau cov khoom puas tsuaj.
Kev kho tom qab vuam dehydrogenation yog hais txog kev kho cua sov uas tsis tshua muaj tshwm sim tom qab vuam tiav thiab thaum lub vuam tsis txias qis dua 100 degree. Cov lus qhia dav dav yog cua sov ntawm 200 degree, kev txuag hluav taws xob ntawm 350 degree, thiab txuag hluav taws xob rau 2 teev thiab 6 teev. Lub luag haujlwm tseem ceeb ntawm kev kho mob tom qab vuam hydrogen tshem tawm yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau, nws muaj qhov ua tau zoo ntawm cov khoom siv hlau.
Kev ntxhov siab rau kev kho cua sov yog los txo cov yield zog ntawm welded workpiece ntawm qhov kub thiab txias, thiaj li yuav txo tau qhov vuam kev nyuaj siab. Muaj ob txoj hauv kev uas feem ntau siv: ib qho yog tag nrho cov kub-kub tempering, uas yog, cov vuam yog muab tso rau hauv lub qhov cub cua sov, maj mam rhuab mus rau qhov kub thiab txias, ces khaws cia rau ib lub sij hawm, thiab tom qab ntawd txias hauv huab cua lossis hauv qhov cub. Txoj kev no tuaj yeem tshem tawm 80% ~ 90 feem pua ntawm kev ntxhov siab vuam. Lwm txoj kev yog lub zos kub-kub tempering, uas yog, tsuas yog cua sov lub weld thiab nws cov cheeb tsam nyob ib sab, thiab ces txias maj mam kom txo tau lub ncov nqi ntawm welding kev nyuaj siab thiab ua rau cov kev nyuaj siab faib kuj ruaj khov. Lub hom phiaj ntawm kev tshem tawm cov kev ntxhov siab hauv zos yog kom ua tiav lub hom phiaj ntawm kev tshem tawm cov kev ntxhov siab hauv zos.
Tom qab qee cov ntaub ntawv hlau alloy yog welded, cov txheej txheem hardened yuav tshwm sim nyob rau hauv cov pob qij txha welded, uas yuav deteriorate lub mechanical zog ntawm cov ntaub ntawv. Tsis tas li ntawd, nyob rau hauv qhov kev txiav txim ntawm vuam kev nyuaj siab thiab hydrogen, lub quenched qauv yuav ua rau kev puas tsuaj rau cov leeg. Tom qab kev kho cua sov, cov qauv metallographic ntawm qhov sib koom ua ke tau zoo dua qub, cov yas thiab cov tawv tawv ntawm cov welded sib koom tau zoo tuaj, thiab cov khoom siv dav dav ntawm cov welded sib koom ua ke tau zoo dua.
