Hauv cov txheej txheem steelmaking, ntawm ib sab, oxygen xav tau thaum lub sij hawm cua sov ntawm cov hlau molten. Cov pa oxygen kuj yuav tsum tau siv los ua cov tshuaj tiv thaiv nrog carbon, sulfur thiab lwm yam khoom tsis zoo hauv cov hlau molten los txhim kho cov hlau zoo. Ntawm qhov tod tes, cov pa oxygen molecules hauv cov hlau molten yuav cuam tshuam rau cov khoom siv dag zog thiab lub zog ntawm cov hlau, yog li cov hlau molten yuav tsum tau deoxidized.
Oxygen ntawm cov teeb meem tseem ceeb ntawm steelmaking
1, oxygen yog ib qho ntawm cov laj thawj rau kev tsim cov cam khwb cia hlau qhov porosity
Nyob rau hauv tus txheej txheem ntawm solidification ntawm steel, vim lub solubility ntawm oxygen nrog poob nyob rau hauv qhov kub thiab ib tug tseem ceeb txo, yog li ntawd, nag lossis daus ntawm oxygen yuav hnov mob nrog cov pa roj carbon nyob rau hauv cov kua hlau, uas ua rau CO npuas yog khaws cia nyob rau hauv lub hlau yuav ua porosity.
2. Oxygen txhawb kev tsim cov kub tawg hauv cov hlau cam
Thaum cov pa oxygen cov ntsiab lus ntawm cov hlau molten siab dhau lawm, qhov nyiam ntawm kub tawg ntawm cam khwb cia hlau yuav aggravated. Qhov laj thawj yog vim li cas thaum FeO thiab FeS sib ntsib, lawv tsim cov ntsiab lus melting tsawg (940 degree) eutectic (FeO·FeS) thiab muab faib rau hauv daim ntawv ntawm zaj duab xis ntawm cov ciam teb. Yooj yim ua rau thermal tawg.
3. Oxygen yog ib qho ntawm cov ntsiab lus tseem ceeb uas tsim cov khoom tsis yog hlau
Oxygen tuaj yeem hnov mob nrog ntau lub ntsiab lus los tsim oxide inclusions. Yog tias cov kev suav no khaws cia hauv cov hlau, lawv yuav txo qhov kev ua tau zoo ntawm cov hlau cam khwb cia.
Deoxidation yuav tsum tau ntxiv cov ntsiab lus uas ua ke nrog oxygen thiab yooj yim tshem tawm ntawm cov hlau molten rau hauv lub slag. Raws li kev khi lub zog ntawm ntau yam hauv cov hlau molten rau oxygen, qhov kev txiav txim los ntawm qaug zog mus rau lub zog yog raws li nram no: chromium, manganese, carbon, silicon, vanadium, titanium, boron, txhuas, zirconium, thiab calcium. Yog li ntawd, hlau alloys muaj li ntawm silicon, manganese, txhuas thiab calcium feem ntau yog siv rau steelmaking deoxidation.
