Tshawb nrhiav cov khoom siv hlau hnav-resistant (1)
Cov khoom siv hlau hnav-tiv taus muaj xws li cov ntaub ntawv yas thiab cov ntaub ntawv tawv tawv. Tam sim no, hom hauv qab no tau siv dav.
(1) Austenitic hnav-resistant manganese steel Austenitic manganese hlau yog paub rau nws cov siab toughness thiab yooj yim ua hauj lwm hardening. Cov austenitic manganese steel tsim thiab siv hauv tsev thiab txawv teb chaws tseem yog Mnl3 series, thiab nws cov tshuaj muaj pes tsawg leeg yog:=1.0 feem pua ~ 1.4 feem pua ,=11 feem pua ~ 14 feem pua . Tom qab 1000 ~ 1050 feem pua ntawm cov dej toughening kho, ib qho austenitic manganese hlau tuaj yeem tau txais. lub cev nqaij daim tawv. Txog tam sim no, nws tau siv rau hauv cov khoom siv abrasive nrog cov kev cuam tshuam loj (xws li cov phab ntsa dov thiab crushing phab ntsa ntawm lub khob hliav qab crusher, hauv ob sab phlu ntawm gyratory crusher, particle phaj ntawm qhov loj thiab nruab nrab particle crusher, Austenitic manganese steel yog tseem siv nyob rau hauv lub mine pob zeb liner. Qee lub teb chaws xws li Nyiv nyiam Mnl3Cr2 hnav-resistant steel nrog ntau dua yield zog thiab hnav. Nyob rau xyoo 1950 thiab 1960s hauv kuv lub tebchaws, cov hlau manganese siab yuav luag siv los ua cov khoom siv universal hnav-resistant, tab sis nyob rau hauv kev xyaum ntau lawm, nws tau pom tias siab manganese hlau yog hnav-resistant tsuas yog nyob rau hauv tej yam kev mob ntawm loj tej yam kev mob, siab. kev nyuaj siab, thiab tawv abrasives, thiab nws cov yield zog tsawg, yooj yim rau deform.
Cov kev kawm tau zoo ntawm austenitic manganese steel feem ntau yog tshwm sim hauv kev tswj nruj ntawm Si thiab P cov ntsiab lus uas cuam tshuam rau kev ua tau zoo thaum lub sij hawm tsim khoom, tshwj xeeb tshaj yog kev txwv ntawm P cov ntsiab lus; Tsis tas li ntawd, txhawm rau txo cov slag suav nrog, columnar grain thiab coarse grain Trace cov ntsiab lus xws li V, NI) thiab RE feem ntau ntxiv rau siab manganese hlau. Mnl7 (Mnl8) thiab Mn25, uas yog lub npe hu ua ultra-high manganese steels, muaj txiaj ntsig los daws cov teeb meem uas carbides yooj yim tshwm rau hauv cov hlau manganese tom qab ua kua toughening kev kho mob ntawm cov tuab thiab loj, thiab lub toughness yog txo, thiab nws kuj tseem muaj txiaj ntsig los daws qhov teeb meem ntawm manganese steel qhov chaw uas tej zaum yuav nkig thaum siv hauv qhov kub thiab txias. teeb meem tawg. Txawm li cas los xij, kev hnav tsis kam thiab nqi kev ua haujlwm ntawm ultra-siab manganese steel nyob rau hauv cov xwm txheej ntawm kev cuam tshuam loj thiab hnav tsis zoo, kev xaiv ntawm Mn, C thiab Mn / C ntsig txog / 6 tsis muaj, tshwj xeeb tshaj yog cov teeb meem tseem ceeb xws li lub neej qis hauv qab. tsis tshua muaj kev nyuab siab hnav, tseem yuav daws tau. Nws xav tau kev tshawb fawb tob thiab ua pov thawj ntawm kev siv dav hauv kev ua haujlwm sib txawv.
(2) Chromium-raws li dawb cam khwb cia hlau Txoj kev loj hlob ntawm txawv teb chaws hnav-resistant dawb cam khwb cia hlau yog muab faib ua peb theem: zoo tib yam dawb cam khwb cia hlau, nickel-hard cam khwb cia hlau thiab high-chromium dawb cam khwb cia hlau. Chromium-raws li dawb cam khwb cia hlau tseem yog lub ntsiab ntawm hnav-resistant cam khwb cia hlau nyob rau hauv tsev thiab txawv teb chaws. Crl5, Cr20, Cr26 series high-chromium hnav-resistant cam khwb cia hlau tau raug tsim tawm ntau thiab siv hauv Tebchaws Meskas, Nyiv thiab kuv lub tebchaws. Raws li lub hauv paus ntawm high-chromium cam khwb cia hlau, kuv lub teb chaws tau kawm nruab nrab-chromium-silicon hnav-resistant cam khwb cia hlau thiab tsawg-chromium hnav-resistant cam khwb cia hlau haum rau li-cam khwb cia daim ntaub ntawv, thiab tau loj-tsim thiab industrially thov.
Cov qauv ntawm high chromium cam khwb cia hlau tom qab solidification yog (Fe, Cr) C carbide thiab theem. Thaum lub matrix yog tag nrho martensite, hnav tsis kam ntawm no alloy yog qhov zoo tshaj plaws. Yog tias muaj cov austenite residual hauv matrix, nws feem ntau yuav tsum tau nqa tawm kev kho cua sov; tsawg chromium alloy dawb cam khwb cia hlau muaj kev ruaj ntseg carbide zoo dua li cov dawb El cam khwb cia hlau. Hauv kev kawm ntawm chromium-raws li dawb cam khwb cia hlau, nws yog feem ntau txiav txim siab tias qhov nyuaj ntawm cam khwb cia hlau, qhov hnav-resistant ntau dua. Nyob rau hauv qhov tseeb, qhov muag tsis pom kev ntawm hardness tej zaum yuav tsis tas ua tiav cov nyhuv xav tau, tab sis yuav ua rau kom tus nqi ntau thiab ua rau cov khoom pov tseg. Cov kev ntsuam xyuas tau pom tias qhov siab chromium cam khwb cia hlau yog ze li ntawm 90 feem pua. Thaum lub kaum sab erosion hnav, nws hnav tsis kam yog zoo li 20 steel.
