Kev Ua Haujlwm Ntawm Cov Ntawv Hlau

Nrog rau kev loj hlob ntawm kev tshawb fawb thiab thev naus laus zis thiab kev lag luam, cov kev xav tau siab dua tau muab tso rau pem hauv ntej rau cov khoom siv, xws li lub zog siab dua, tsis kam mus rau qhov kub thiab txias, kev kub siab, qis kub, corrosion kuj, hnav tsis kam thiab lwm yam tshwj xeeb ntawm lub cev thiab tshuaj lom neeg. Cov pa roj carbon steel tsis tuaj yeem ua tau raws li qhov xav tau.
Disadvantages ntawm carbon steel:
(1) Tsawg hardenability. Feem ntau hais lus, qhov siab tshaj plaws hardening txoj kab uas hla ntawm carbon steel dej quenching tsuas yog 10 hli -20 hli.
(2) Lub zog thiab lub zog tawm los yog qhov tsawg. Piv txwv li, σs ntawm cov pa roj carbon zoo tib yam Q235 steel yog 235MPa, thaum lub σs ntawm cov hlau tsis tshua muaj hlau 16Mn yog siab dua 360MPa. Lub σs / σb ntawm 40 steel tsuas yog 0.43, uas yog qis dua li ntawm cov hlau alloy.
(3) Tsis zoo tempering stability. Vim qhov tsis zoo tempering stability, thaum carbon steel raug quenching thiab tempering kev kho mob, yuav tsum tau ib tug qis tempering kub los xyuas kom meej lub zog ntau dua, yog li lub toughness ntawm cov hlau yog kuj tsawg; txhawm rau kom ntseeg tau tias muaj zog dua, lub zog tsawg thaum siv qhov kub thiab txias, yog li cov khoom siv dav dav ntawm cov pa roj carbon steel tsis siab.
(4) Nws tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm kev ua haujlwm tshwj xeeb. Cov pa roj carbon steel feem ntau tsis zoo nyob rau hauv oxidation tsis kam, corrosion kuj, kub tsis kam, tsis kub tsis kam, hnav tsis kam thiab tshwj xeeb electromagnetic zog, thiab tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm kev ua haujlwm tshwj xeeb.