High Temperature Bearing Steel

Feem ntau, cov bearings siv ntawm qhov kub siab tshaj 150 degree yog hu ua high-temperature bearings. Vim tias qhov nyuaj ntawm chromium bearing steel yuav poob qis thaum qhov kub siab tshaj 150 degree ~ C, qhov loj yuav tsis ruaj khov, thiab cov kabmob yuav tsis ua haujlwm ib txwm. Yog li ntawd, rau cov bearings uas ua hauj lwm ntawm ib tug ua hauj lwm kub ntawm 150 ° C ~ E ~ 250 ° C, yog hais tias lub rings thiab rolling ntsiab tseem yog ua los ntawm zoo tib yam high-carbon chromium bearing steel, tshwj xeeb tempering kev kho mob yuav tsum tau nqa tawm nyob rau hauv lub bearings. , feem ntau siab dua Tempering yog nqa tawm ntawm kev ua haujlwm kub ntawm 50 degree . Cov kabmob steel uas tau tempered raws li cov kev xav tau saum toj no tuaj yeem siv tau raws li qhov kub thiab txias ua haujlwm. Txawm li cas los xij, vim qhov txo qis hauv hardness tom qab tempering, lub neej bearing yog txo. Thaum ua haujlwm kub ntawm cov kabmob yog siab dua 250 degree, nws yuav tsum tau ua los ntawm cov kabmob kub tiv taus steel.
Ntxiv nrog rau cov khoom ntawm cov kabmob dav dav, cov kabmob kub kub yuav tsum muaj qee qhov kub-kub hardness, siab kub hnav tsis kam, siab kub tiv taus qaug zog, oxidation tsis kam, kub-kub los tiv thaiv thiab siab-kub qhov ntev. ruaj khov. Feem ntau siv high temperature bearing steels yog:
Molybdenum hlau: Cr4M04V, Crl5M04, 9Crl8Mo, Crl4M04;
Tungsten steel: W9Cr4V2Mo, W18Cr4V;
Tungsten thiab molybdenum series: W6MoSCr4V2.High-temperature bearing steels W, Cr, V, Mo, thiab lwm yam tuaj yeem tsim cov carbides insoluble ntawm qhov kub thiab txias, thiab tuaj yeem precipitate dispersed carbides thaum tempering, uas ua rau cov nyhuv hardening theem nrab, ua rau cov hlau no. tseem muaj qhov kub thiab txias ntawm qee qhov kub. High hardness, hnav tsis kam, muaj zog oxidation tsis kam, siab qaug zog tsis kam thiab seem stability. Ntawm cov kub kub bearing steels, Cr4M04V thiab W18Cr4V yog cov feem ntau siv.
Rau cov kabmob uas muaj cov txheej txheem nyuaj thiab muaj zog cuam tshuam, lawv tuaj yeem ua los ntawm cov hlau kub-kub carburized. 12Cr2Ni3M05 yog qhov kub-kub carburized steel nrog kev ua tau zoo dua. Vim nws cov ntsiab lus carbon tsawg (kwv yees li 0.15 feem pua), tsis muaj qhov tsis sib xws ntawm carbides tsis sib xws, tsis tshua muaj annealing hardness, zoo txiav kev ua tau zoo, thiab siab toughness. Zoo forgeability tuaj yeem nce qhov sib piv ntawm cov kabmob, uas muaj txiaj ntsig zoo rau kev pabcuam lub neej ntawm cov kabmob. Tom qab carburizing, nws tuaj yeem ua tau raws li qhov kev pabcuam ntawm qhov kub hauv qab 430 ~ C, thiab muaj kev cuam tshuam zoo.
H10Cr4M04Ni4VA yog tam sim no qhov zoo tshaj plaws high-temperature carburized bearing steel, tab sis nws cov nqi kuj kim heev. Thaum qhov kev pabcuam kub ntawm cov kabmob siab tshaj 500 ~ E, nws yog ib qho nyuaj rau ua tau raws li qhov yuav tsum tau ua ntawm high-temperature-resistant bearing steel, thiab high-temperature-resistant cov ntaub ntawv xws li cobalt-based, nickel-based alloys lossis ceramics yuav tsum yog. siv.
High-temperature bearings yog siv nyob rau hauv aviation dav hlau cav, roj turbines, nuclear reactor systems, X-ray raj tungsten discs, thiab high-speed aircraft, foob pob ua ntxaij, thiab spacecraft.