Cov qauv hlau yog cov hlau siv hauv cov khoom siv. Hauv paus, nws txhais tau tias yog steel optimized rau siv nyob rau hauv lub tsev tsim, txawv los ntawm ib tug qib ntawm steel uas yuav siv tau los tsim cov cuab yeej, los yog stainless hlau nrov siv nyob rau hauv chav ua noj chaw thiab cov khoom siv.
Cov qauv hlau feem ntau yog carbon steel, txhais tau tias nws muaj tshuaj lom neeg muaj pes tsawg leeg uas muaj hlau thiab carbon. Cov qauv hlau yog ib pawg ntawm cov hlau uas muaj cov ntsiab lus carbon txog li 2.1% ntawm nws qhov hnyav tag nrho. Qhov siab dua cov ntsiab lus ntawm cov pa roj carbon monoxide, qhov siab dua qhov tawm los ntawm ib daim hlau, txhais tau tias nws tsis tshua muaj ductile lossis tsawg dua yuav khoov lossis deform thaum lub siab thov.
Hauv qab no yog cov qib steel feem ntau siv hauv kev tsim kho kev lag luam:
Cov pa roj carbon steel. Cov qauv hlau yog tsim cov pa roj carbon steel thaum tsis muaj lwm yam alloying ntxiv, cov ntsiab lus tooj liab tsis tshaj 0.4 txog 0.6%, manganese tsis tshaj 1.6%, thiab silicone tsis tshaj 0.6%. Nws yog feem ntau siv hauv cov kav dej thiab cov kav dej.
Siab zog thiab qis alloy steels. Cov qib ntawm cov hlau no yog tsim los ua kom zoo rau cov khoom siv kho tshuab thiab kev tiv thaiv corrosion. Lawv muaj manganese qib txog li 2%. Cov kab ntawm chromium, nickel, molybdenum, nitrogen, vanadium, niobium thiab titanium tuaj yeem siv los hloov cov khoom. Cov no tsuas yog siv rau hauv cov qauv duab thiab cov ntawv hlau.
Forged steels. Forging yog tus txheej txheem ntawm shaping hlau thaum nws tseem nyob rau hauv ib tug khoom lub xeev. Qhov no yog ua los ntawm kev siv dag zog los yog cua sov rau steel ingots los yog billets. Cov txheej txheem tsim cov qauv zoo rau cov hlau, uas txhim kho kev ncaj ncees los ntawm kev tshem tawm cov voids thiab roj npuas, thiab ua kom muaj zog tag nrho.
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