Raws li seb cov khoom siv hauv paus yog melted thiab lub siab ua ntawv thov, cov neeg faib txoj kev vuam mus rau peb pawg: fusion vuam, vuam siab thiab txhuam.
Usion Fusion welding Siv qee qhov tseeb los ua kom qhov kub ntawm qhov txuas ntawm qhov chaw mus rau lub xeev tsis muaj dab tsi (tsis muaj lub zog cuam tshuam), thiab tom qab ntawd txias thiab crystallize los tsim lub weld. Thaum lub pob hlau txuas nrog ua kom sov rau hauv lub xeev molten los ua kua pas ua kua, cov atoms yog tag nrho diffused thiab sib ze, thiab lub zog sib txuas ua ke tau tsim tom qab txias thiab solidification. Cov kev siv fusion vuam feem ntau suav nrog electrode arc vuam, submerged arc vuam, electroslag vuam, roj viav vuam, plahaum arc vuam thiab li ntawm.
② Vuam vuam yuav tsum tau siv rau qhov txuas (cua sov lossis tsis cua sov) thaum lub sijhawm ua haujlwm vuam siab. Ib qho yog ua kom sov cov hlau sib txuas ua ib ntu rau lub xeev yas lossis ib feem melting xeev, thiab tom qab ntawd thov siv qee qhov siab kom ua rau cov hlau atoms ua ke sib xyaw. Lub cev sib tsoo welded pob qij txha, xws li forge vuam, kuj vuam, vuam diffusion, txhuam vuam, thiab lwm yam.; qhov thib ob yog tsis muaj cua sov, thiab tsuas yog siab txaus siv rau qhov sib chwv ntawm qhov chaw txuas rau cov hlau txuas ua rau cov yas tawg, yog li tus thawj inter-theem tsis rub tawm kom txog thaum muaj kev sib koom ua ke tau, xws li siab txias vuam, cov khoom tawg vuam, lwm yam"
③ Brazing siv cov khoom siv nrog qhov chaw qis tshaj qhov ua tau zoo dua li cov khoom siv hauv paus uas yog cov hlau txhuam cov hlau, cov hlau tsis sib haum thiab cov hlau ua kom zoo nkauj rau qhov kub kub dua li qhov chaw piam ntawm qhov muab tub lim hlau tab sis qis dua qhov ua kom tawg ntawm lub hauv paus hlau, thiab siv capillary kev txiav txim siab los sau cov sib koom ua ke nrog cov kua roj txhuam cov hlau ua kom yaj lub ntsej muag cov khoom tawg ua rau saum npoo ntawm cov khoom siv dag zog, thiab tom qab txias, cov khoom lag luam tsim cov ntawv cog lus xim hlau ntawm qhov sib koom tes. Tus txheej txheem txhuam tau muab faib ua kom sib dhos thiab kom tawv muag. Raws li txoj kev cua sov, nplaim hluav taws xob, hluav taws xob hluav taws xob, tsis kam, ntsev da dej, ultrasonic thiab lwm yam cua sov tuaj yeem siv raws li.
Arc yog cov khoom siv vuam siv vuam siv ntau, feem ntau yog siv rau kev fusion vuam. Fais vuam lossis cov hlau ua haujlwm tsis zoo siv cov cua sov ua haujlwm rau vuam. Kev sib txhuam vuam, vuam siab vuam thiab kev sib txuas vuam siv lub zog ntawm lub zog ntawm cov tshuab hluav taws xob cable los txuas, los ntawm kev sib zog sab saum toj, rauj, kev sib txhuam thiab lwm yam kev txhais tau tias. Yas rheology tshwm sim nyob rau hauv kev sib koom tes ntawm qhov chaw ua haujlwm, rhuav tshem cov hlau oxide zaj duab xis ntawm kev sib koom tes, thiab ua rau sab nraud quab yuam. Cov hlau oxide txuas ntxiv kom paub cov hlau txuas rau hlau. Cov pa roj vuam tso siab rau kev sib xyaw ua ke ntawm cov roj sib txuas (xws li acetylene, nkev roj, liquefied roj av roj, thiab lwm yam) thiab oxygen los tsim cov cua kub uas yuav tsum tau ua rau vuam, hla lossis txiav.
