Vim li cas qhov chaw welder yuav tsum tau preheated ua ntej vuam?

Cov txheej txheem txhais tau tias cua sov tag nrho lossis ib feem ntawm qhov chaw vuam ua ntej qhov chaw vuam tshuab vuam hu ua preheating. Rau cov hlau uas muaj zog vuam ntau ntau, muaj kev nyiam ua kom tawv, cov khoom siv tshwj xeeb zoo thermal conductivity, thiab tuab weldments, thiab thaum lub ambient kub ntawm qhov vuam yog tsawg heev, nws yog ib qho tsim nyog yuav tsum tau preheat lub weldments ua ntej vuam. Lub hom phiaj tseem ceeb ntawm preheating yog los txo qhov txias ntawm qhov sib koom ua ke. Raws li tuaj yeem pom los ntawm lub rooj, preheating tuaj yeem txo qhov txias txias yam tsis muaj kev cuam tshuam rau lub sijhawm nyob ntawm qhov kub thiab txias, uas yog qhov zoo tagnrho. Yog li ntawd, thaum welding steels nrog ib tug hardening nyiam, lub ntsiab technologies ntsuas los txo tus nqi cua txias thiab txo cov hardening nyiam yog ua preheating es tsis txhob ua kom cov kab zog.