Raws li cov cuab yeej tseem ceeb hauv kev mining, metallurgy, cov ntaub ntawv hauv tsev, thiab lwm yam kev lag luam, cov cam khwb cia ntawm crushers -xws li lub puab tsaig phaj, concave liners, mantle liners, thiab hammers - ncaj qha txiav txim siab kev ua hauj lwm efficiency thiab tu cov nqi ntawm tag nrho cov tshuab. Muab qhov chaw pabcuam hnyav heev, cov khoom siv no txuas ntxiv mus rau siab - siv zog, compression, thiab abrasive hnav, ua rau kev xaiv cov khoom siv tseem ceeb heev.
Ntawm ntau yam hnav- cov ntaub ntawv tiv taus, siab manganese steel tuav txoj haujlwm tseem ceeb vim nws qhov tshwj xeeb ua haujlwm tawv tawv. Austenitic siab manganese hlau, sawv cev los ntawm ZGMn13, pom tias tsis tshua muaj pib hardness tab sis zoo heev toughness. Raws li kev cuam tshuam muaj zog, nws ntog sai heev, nrog hardness nce los ntawm kwv yees li HB200 mus rau tshaj HB500. Cov yam ntxwv ntawm "ua nyuaj nrog kev cuam tshuam" ua rau nws tshwj xeeb tshaj yog haum rau cov khoom tseem ceeb hauv lub khob hliav qab crushers thiab lub puab tsaig crushers, tshwj xeeb tshaj yog thaum ua cov ntaub ntawv nyuaj xws li granite thiab basalt. Txawm li cas los xij, thaum lub zog cuam tshuam tsis txaus, kev ua haujlwm hardening mechanism tsis tuaj yeem ua kom tiav, ua rau muaj kev hnav tsis zoo.
Rau kev khiav hauj lwm tej yam kev mob uas puas yog thawj qhov kev txhawj xeeb thiab kev cuam tshuam yog theem nrab, siab chromium cam khwb cia hlau yog ib qho kev xaiv zoo tshaj plaws. Cov khoom siv no feem ntau muaj 12% mus rau 26% chromium, nrog lub microstructure uas muaj cov ntim loj ntawm siab -hardness M7C3-hom carbides, thaum lub matrix ua tiav cov qauv tempered martensite los ntawm kev kho cua sov, ncav cuag tag nrho hardness ntawm HRC60 lossis siab dua. Nws tsis kam mus rau abrasive hnav tau ntau dua li cov hlau manganese siab, ua rau nws siv dav hauv cov khoom xws li cuam tshuam crusher tshuab tuav thiab xuab zeb ua tshuab hnav qhov chaw. Txawm li cas los xij, siab chromium cam khwb cia hlau muaj qhov toughness tsis tshua muaj thiab muaj kev cuam tshuam rau cov khoom thauj, ua rau muaj kev pheej hmoo ntawm kev tawg raws li kev cuam tshuam hnyav los ntawm cov ntaub ntawv loj.
Nyob nruab nrab ntawm ob qhov no, qis- alloy hnav- cov hlau tsis muaj zog ua rau muaj qhov sib txawv ntawm kev ua haujlwm. Los ntawm kev sib koom ua ke cov ntsiab lus alloying xws li chromium, molybdenum, thiab npib tsib xee, ua raws li quenching thiab tempering, cov khoom siv no tsim cov qauv tempered martensite los yog bainite, ua kom muaj kev sib npaug zoo ntawm hardness thiab toughness. Nws zoo- cov khoom siv tshuab sib npaug ua rau nws haum rau crushing nruab nrab- cov ntaub ntawv nyuaj thiab rau cov xwm txheej nyuaj uas muaj kev cuam tshuam thiab puas.
Hauv kev siv tswv yim, tsis muaj ib qho khoom siv tuaj yeem hais txog txhua qhov xwm txheej crushing. High manganese steel excels nyob rau hauv kev cuam tshuam tsis kam, siab chromium cam khwb cia hlau tshwj xeeb hauv kev hnav tsis kam, thiab alloy steel muaj kev sib haum xeeb ntawm ob. Kev xaiv cov khoom tsim nyog yuav tsum tau xav txog cov khoom siv hardness, pub me me, hom crusher, thiab cov theem ntawm lub zog. Raws li cov cuab yeej txuas ntxiv nce thiab cov kev ua haujlwm loj hlob zuj zus, thev naus laus zis xws li kev sib xyaw ua ke, bimetallic composites, thiab kev tswj xyuas microstructure meej tau tshwm sim los ua cov lus qhia tseem ceeb. Lub hom phiaj tseem ceeb tseem tab tom nrhiav kom muaj qhov sib npaug zoo dua hauv kev ua lag luam mus tas li - tawm ntawm qhov tawv thiab tawv.
