Cov pa roj carbon nruab nrab feem ntau yog hais txog cov ntsiab lus carbon ntawm li 0.25 txog 0.60% carbon steel.Phau ntawv arc vuam ntawm carbon steel casting thiab vuam ntawm lub ntsiab nta raws li nram no:

(1) Lub hauv paus hlau nyob ze ntawm qhov chaw weld muaj qhov tsis tshua muaj plasticity ntawm cov ntaub so ntswg tawv.Qhov siab dua cov ntsiab lus ntawm cov pa roj carbon monoxide, phaj thickness, ntau dua qhov kev xav hardened.Weldment stiffer, ceev txias thiab xaiv pas nrig tsis yog lub sij hawm, nws yuav ua rau txias cracking.

(2) Txij li thaum lub hauv paus hlau melted mus rau hauv thawj txheej ntawm weld hlau piv ntawm li 30%, yog li qhov siab dua cov ntsiab lus ntawm cov vuam, qhov tshwm sim yog ib qho yooj yim rau weld hlau kub cracking thiab txias cracking.

Kev ntsuas coj los ntawm kev vuam ntawm cov pa roj carbon steel

(1) Yog tias ua tau, xaiv ib qho yooj yim-hydrogen electrodes.Xws li electrodes thiab siab tsis kam mus rau txias cracking kuj rau thermal cracking peev.Cov neeg mob, los ntawm kev tswj hwm qhov kub thiab txias ua ntej thiab txo qis ntawm lub hauv paus hlau nkag mus rau weld carbon cov ntsiab lus thiab lwm yam kev ntsuas, kev siv cov calcium ilmenite hom electrode kuj yuav tau txais txiaj ntsig zoo.Thaum lub zog ntawm cov pob qij txha welded thiab lub hauv paus hlau tsis tas yuav tsum tau sib npaug ntawm lub sijhawm yuav tsum tau siv rau hauv kev siv qis qis qis qis hydrogen electrodes.Xws li Weld Weld yas, ua kom txias tawg thiab thermal tawg ntawm tsawg txaus ntshai.

(2) Preheat lub ntsiab thev naus laus zis ntsuas vuam thiab kho vuam vuam ntawm cov hlau, tshwj xeeb tshaj yog cov thickness ntawm cov vuam, rigidity yog loj, sov-up nyob rau hauv kev pom zoo ntawm txo qhov siab tshaj plaws hardness ntawm tshav kub cuam tshuam cheeb tsam thiab tiv thaiv txias cracking, thiab tuaj yeem txhim kho. yas sib koom.Zuag qhia tag nrho warm-up thiab kom sov-up kuj yuav txo tau lub zos post weld residual kev nyuaj siab.Cov ntsiab lus carbon ntawm cov vuam sib txawv carbon steel vuam preheat kub thiab tsis muaj kev cai tsis sib xws.Qhov no tsis yog tsuas yog vim qhov kev xaiv ntawm qhov kub thiab txias yog txiav txim siab los ntawm cov ntsiab lus carbon ntawm electrode, tab sis kuj cuam tshuam los ntawm lwm yam, xws li qhov loj thiab tuab ntawm vuam, vuam hom, vuam tsis thiab qhov nruj ntawm cov qauv thiab yog li ntawd.