Dab tsi yog steel tua phaj?
Cov hluav taws tua hluav taws steel phaj yog ua los ntawm cov pa roj carbon zoo tib yam steel kub dov hlau. Cov hlau tuag yog deoxidized tag nrho, cov hlau molten ua ntej nchuav nrog ferromanganese, ferrosilicon thiab txhuas kom tiav deoxidation, cov pa oxygen ntawm cov hlau molten yog tsawg (feem ntau 0.002-0.003%), cov hlau molten nyob rau hauv pwm ingot calms, tsis tsim boiling phenomenon, extinguishing lub npe ntawm cov hlau no. Raws li kev ua haujlwm ib txwm muaj, tsis muaj npuas nyob hauv cov hlau tuag, thiab cov qauv tsis sib xws thiab ntom.
Vim tias cov ntsiab lus tsis tshua muaj oxygen, muaj tsawg dua cov oxide suav nrog hauv cov hlau, siab dua purity, tsis txias brittleness thiab nyiam kev laus. Nyob rau tib lub sijhawm, cov hlau tuag muaj kev sib cais tsawg dua, kev ua haujlwm zoo dua qub thiab zoo dua. Qhov tsis zoo ntawm cov hlau tuag yog cov concentrated shrinkage qhov, qis ntau lawm thiab tus nqi siab. Yog li ntawd, cov hlau tuag-cam khwb cia feem ntau yog siv rau qhov kub thiab txias ntawm qhov cuam tshuam, welded structural qhov chaw thiab lwm yam khoom uas xav tau lub zog siab.
Cov hlau tsis tshua muaj hlau phaj muaj cov hlau tsis zoo thiab cov hlau tsis zoo. Vim nws lub zog siab thiab kev ua tau zoo dua, nws tuaj yeem txuag tau ntau cov hlau thiab txo qhov hnyav ntawm cov qauv, thiab nws daim ntawv thov tau dhau los ua ntau dua.
