AISI 4140 tsis zoo rau kev ncaj ncees weldability vim nws cov ntsiab lus carbon nruab nrab. Nws yog ib qho yooj yim rau kev sib sau ua ke, tawg -sensitive martensite nyob rau hauv lub tshav kub- cuam tshuam cheeb tsam (HAZ). Vuam feem ntau tsis pom zoo rau qhov uas twb muaj cua sov lawm - cov khoom siv kho mob tshwj tsis yog ua raws li tag nrho re- kho cua sov.
Yog tias welding tsis tuaj yeem zam:
Preheat:Qhov tseem ceeb. Feem ntau 250-350℃rau nruab nrab seem.
Tsawg-Hydrogen txheej txheem:Siv tsawg-hydrogen electrodes (E10018-D2 hom), thiab ua kom lawv qhuav zoo kawg nkaus.
Tshaj tawm -Weld Heat Treatment (PWHT): Yuav tsum tau.Tam sim ntawd tom qab welding, ua ib qho kev ntxhov siab anneal ntawm ~ 600-650℃, los yog tag nrho re-austenitize, quench, thiab temper voj voog los kho cov khoom thiab soften HAZ.
Filler Hlau:Feem ntau qhov qis dua -lub zog, tawg ntau dua- cov khoom siv tiv thaiv zoo li AWS ER80S-D2 yog siv los ua kom qis dua - lub zog sib tw tab sis ua kom muaj kev sib koom ua ke.