Annealed qauv ntawm cov hlau tsis tshua muaj hlau yog ferrite thiab me me ntawm pearlite, nws lub zog thiab hardness qis dua, thiab nws cov yas thiab tawv yog zoo dua.Yog li ntawd, nws cov cuab yeej txias tsim yog qhov zoo, tuaj yeem siv tau los dov, khoov, stamping thiab lwm txoj hauv kev rau cov qauv txias.Cov hlau tseem muaj qhov zoo weldability.Tsawg cov pa roj carbon hlau nrog cov pa roj carbon ntsiab lus li ntawm 0.10% mus rau 0.30% yog nkag tau yooj yim rau ntau cov txheej txheem machining xws li forging, vuam thiab txiav, thiab feem ntau yog siv los tsim cov saw, rivets, bolts, shafts, thiab lwm yam.Cov pa roj carbon ntsiab lus ntawm cov pa roj carbon steel yog tsawg dua 1.35% (0.1-1.2%), tshwj tsis yog cov hlau, carbon thiab silicon, manganese, phosphorus, sulfur thiab lwm yam tsis txaus nyob hauv cov kev txwv, cov hlau tsis muaj lwm cov ntsiab lus sib xyaw.Kev ua tau zoo ntawm carbon hlau nyob ntawm nws cov ntsiab lus carbon ntau xwb.Nrog rau cov ntsiab lus carbon ntau ntxiv, lub zog thiab tawv ntawm cov hlau ntau ntxiv, thiab cov khoom siv yas, tawv thiab weldability poob qis.Piv nrog rau lwm hom steel, carbon steel yog qhov ntxov tshaj plaws nyob rau hauv kev siv, nrog tus nqi qis, kev kawm ntau yam thiab kev siv ntau tshaj plaws.Nws tsim nyog rau cov dej, chav, cua, hydrogen, ammonia, nitrogen thiab roj av cov khoom siv uas nws lub siab yog pn≤ 32.0mpa thiab qhov kub thiab txias yog -30-425 ℃.Cov qhab nia sib xws xws li WC1, WCB, ZG25 thiab zoo hlau 20, 25, 30 thiab tsawg cov qauv hlau loj 16Mn.Cov kab ntawm cov pa roj carbon steel yuav tsum loj dua, qis carbon hlau, nruab nrab carbon hlau, siab carbon cov hlau yog cov carbon hlau.
Hais txog tsawg dua 2.11% feem pua ntawm cov pa roj carbon thiab cov khoom siv hlau loj tsis muaj tshwj xeeb koom nrog hlau. Qee zaum hu ua cov hlau lossis carbon hlau. Cov pa roj carbon steel lossis carbon hlau, yog hais txog Wc tsawg dua 2.11% ntawm cov hlau carbon cov hlau ua haujlwm. Cov pa roj carbon ntsiab lus ntawm carbon hlau ntxiv rau carbon feem ntau muaj cov nqi me me ntawm silicon, manganese, sulfur, phosphorus. 1) tuaj yeem tso raws li kev siv cov pa roj carbon steel peb chav ntawm cov qauv txheej txheem steel, carbon tool steel thiab yooj yim txiav steel, carbon cov qauv steel hlau tsev yog muab faib ua cov txheej txheem steel ob hom hlau thiab tshuab tsim;(2) raws li txoj kev smelting yuav muab faib ua qhib hearth steel, hloov hlau;(3) raws li tus txheej txheem ntawm deoxidation, nws tuaj yeem muab faib ua cov hlau tsis huv (F), cov hlau (Z), cov hlau tsis muaj steel (b) thiab tshwj xeeb tsim cov hlau (TZ).(4) raws li cov pa roj carbon ntsiab lus ntawm carbon hlau tuaj yeem muab faib ua cov carbon hlau tsawg (WC ≤ 0.25%), nruab nrab carbon hlau (wc0.25% - 0.6%) thiab cov pa roj carbon siab (WC& gt);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 (muaj cov phosphorus, sulfur siab dua), cov pa roj carbon steel zoo (muaj cov phosphorus, sulfur qis dua), cov hlau zoo (muaj phosphorus, sulfur. qis dua) thiab zoo zoo hlau.