Kev faib tawm ntawm cov qauv hlau
(1) Raws li daim ntawv thov, carbon hlau muaj peev xwm muab faib ua peb hom: carbon cov txheej txheem steel, carbon tool steel thiab dawb-txiav txhim kho steel. Cov pa roj carbon steel sib cais tau muab faib ua vaj tsev tsim txua hlau thiab tshuab ua hlau ua lub tsev hlau;
(2) Raws li txoj kev smelting, nws muaj peev xwm raug faib ua qhib hearth steel thiab hloov hlau;
(3) Raws li txoj kev deoxidation, nws tuaj yeem muab faib ua cov roj rhaub (F), tua cov hlau (Z), cov hlau tuag (b) thiab cov hlau tua tshwj xeeb (TZ);
(4) Raws li cov ntsiab lus carbon, carbon hlau tuaj yeem muab faib ua cov pa roj carbon tsawg (WC ≤ 0.25%), carbon hlau nruab nrab (WC 0.25% - 0.6%) thiab cov pa roj carbon siab (WC> 0.6%);
(5) Raws li qhov ua tau zoo ntawm cov hlau, carbon hlau muaj peev xwm muab faib ua cov pa roj carbon hlau (cov phosphorus thiab cov leej faj), cov pa roj carbon zoo (tsis muaj phosphorus thiab sulfur) thiab cov hlau zoo (tsis muaj phosphorus thiab leej faj. )). ) thiab hwm zoo hlau.