Puas yog txhua tus paub tias nitrided chromium hlau ua li cas? Qhov tseeb, nitrided chromium hlau feem ntau yog siv los ua deoxygenation thiab desulfurization tus neeg sawv cev. Tam sim no peb paub tias nitrided chromium hlau ua li cas, leej twg paub txog qhov cuam tshuam ntawm deoxygenation thiab desulfurization cov neeg ua haujlwm ntawm cov hlau tsis muaj hlau nyob hauv lub siab kub boiler raj steel?
txog ω (Als) Tsawg dua lossis sib npaug ntawm 0.01% siab-siab boiler raj steel, kev siv ob deoxidizers tsis tshua muaj txiaj ntsig rau tag nrho cov pa oxygen hauv cov hlau tom qab kev kho VD, thiab ob qho tib si tuaj yeem txo cov ω (TO) tswj ntawm 20 × Hauv qab 10-6; Tom qab Si-Al-Ba deoxygenation, qis tag nrho cov pa oxygen tuaj yeem tau txais hauv txhua qhov txheej txheem, thiab cov nyhuv deoxygenation ntawm txhua tus txheej txheem muaj zog dua li ntawm Si-Ca deoxygenation.
Thaum siv ob lub deoxidizers sib txawv, Si Ca thiab Si Al Ba, muaj qhov sib txawv tseem ceeb ntawm tus nqi thiab nplai ntawm impurities ntxiv thaum lub sijhawm ua haujlwm. Tus nqi ntawm impurities ntxiv nyob rau hauv txhua txoj kev tom qab Si Al Ba deoxidization tsawg dua li tom qab Si Ca deoxidization, thiab cov nplai me dua.
Thaum siv ob lub deoxidizers sib txawv, Si Ca thiab Si Al Ba, qhov tseem ceeb thib ob oxidation tshwm sim nyob rau hauv cov hlau molten thaum lub sij hawm casting txheej txheem, tab sis qhov thib ob oxidation ntawm Si Al Ba deoxidized hlau yog hnyav dua.
Muaj qhov sib txawv tseem ceeb nyob rau hauv muaj pes tsawg leeg ntawm impurities thiab cov ntsiab lus ntawm txhuas impurities nyob rau hauv cov khoom forged. Thaum siv Si Al Ba deoxygenation, cov impurities nyob rau hauv cov khoom forged yog tsuas yog thaiv thiab saw zoo li alumina. Thaum siv Si Ca deoxygenation, cov impurities nyob rau hauv cov khoom forged yog tsuas yog strip zoo li silicon manganese aluminate composite impurities; Cov ntsiab lus ntawm txhuas impurities hauv Si Ca alloy deoxygenated forgings yog qis dua li ntawm Si Al Ba alloy deoxygenated forgings.