Dab tsi yog qhov kev faib tawm ntawm cov hlau hnav tsis taus thiab pob zeb steel pob?

Hnav-resistant steel pob yog qhov tsis tseem ceeb (sib tsoo lub cev) ntawm pob zeb. Nws yog tsis ntseeg qhov loj tshaj plaws coj cov khoom siv tiv taus cov khoom siv tau ntawm lub ntiaj teb' s txoj kev lag luam hauv kev lag luam ziag no thiab yav tom ntej xav tau. Hauv xyoo 2008, tsuas yog ib txoj kev lag luam nyob hauv Suav teb thiaj tau noj. Txog 2 lab tons ntawm steel npas ntawm ntau yam khoom siv, thiab kuv lub teb chaws' s kev lag luam MAAs xav tias yuav siv sijhawm li ntawm 200,000 tons hauv xyoo 2009.

Cov coj-resistant steel npas ntawm kev ua lag luam feem ntau muab faib ua ob hom: pov pob steel pob thiab forged steel npas.

1. Nrum steel pob (nrum sib tsoo pob) yog cov khoom siv pob steel siv lub tshuab tso hluav taws xob hauv nruab nrab ua kom sov cov khoom siv xws li seem hlau thiab cov ntawv hlau los ua kom lub txim tag. Nyob rau hauv kev txheej txheem ntawm melting lub them, tus nqi tsim nyog ntawm precious hlau alloy (xws li ferrochrome) ntxiv. , Ferromanganese, ferrovanadium, thiab lwm yam) hauv qhov cub tawg rau tshuaj lom neeg muaj pes tsawg leeg tempering. Tom qab qhov kub ntawm cov hlau molten ncav cuag 1550 ° C lossis siab dua thiab cov txheej txheem yuav tsum tau ua tiav, cov hlau uas tsim nyog tau muab nchuav rau cov steel npas lossis cov pob steel ntau lawm kab. Ntawd yog, lub npas steel tsim los ntawm kev ua kom ntog thiab smelting yog hu ua cam khwb cia steel pob (nrum sib tsoo pob).

Cov ntawv cam khwb cia steel tau muab faib ua cov qib siab chromium alloy nrum npas, pob ntau pob alloy pawg, thiab low-chromium alloy nrum npas raws li lawv cov ntaub ntawv.

2. Forged steel npas yog cov npas steel tsim tawm los ntawm cov tuam txhab steel pob los ntawm kev kub-txias cua sov thiab tom qab ntawd ua rau. Lawv tsis tas yuav yaj thiab nrum, tab sis raug hu forged steel npas tom qab forging.

Cov ntsiab lus chromium ntawm forged steel npas yog nruab nrab ntawm 0.1% thiab 0.5% (cov khoom forged feem ntau tsis muaj chromium), cov ntsiab lus carbon tsawg dua 1.0%, thiab cov npas steel yog tsim los ntawm qhov kub siab forging. Qee qhov sib tsoo lub pob steel muaj cov tawv tawv tawv (HRC) Nws tuaj yeem ncav cuag ≥56 lossis ntau dua.