Tshawb nrhiav cov khoom siv hlau hnav-resistant (2)
(3) Aube ductile hlau series hnav-resistant cam khwb cia hlau bainite-martensitic hnav-resistant ductile hlau yog tshav kub-kho los ntawm austempering los yog ntxiv cov ntsiab lus alloy los hloov cov matrix rau hauv bainite-ferrite matrix nrog residual austenite Lub cev qauv muaj qhov zoo ntawm siab. lub zog, zoo plasticity, thiab siab dynamic load kev ua tau zoo xws li khoov qaug zog thiab tiv nrog qaug zog. Nws tau siv rau hauv lub zog, camshafts, tsheb traction hooks thiab lwm yam khoom siv hauv tsev thiab txawv teb chaws. Daim ntawv thov ntawm Aube ductile hlau hauv kuv lub teb chaws tseem txwv rau cov khoom nruab nrab thiab qib qis, thiab tseem tsis tau mus txog qib ntawm kev tsim khoom. Nws yog tsuas yog siv nyob rau hauv zus tau tej cov yam ntxwv yam xws li wedge irons thiab crankshafts rau railway wagons, raws li zoo raws li zus tau tej cov hnav-resistant qhov chaw xws li sib tsoo pob thiab rauj taub hau. Qee qhov kev tshawb fawb thiab kev siv tau ua tiav hauv kev tsim cov bainite ductile hlau kav, liners, iav thiab yob.
(4) Steel-raws li hnav-resistant composite cov ntaub ntawv Steel-raws li hnav-resistant composite cov ntaub ntawv siv steel raws li cov hlau bonding thiab refractory hlau carbide raws li cov khoom sib txuas rau cov theem nyuaj, thiab tau industrially siv nyob rau hauv tej yam hnyav hnav. Nws cov microstructure yog tus cwj pwm los ntawm cov hmoov nplej zoo sib npaug sib npaug hauv cov hlau matrix, uas muaj cov tawv tawv thiab hnav tsis kam ntawm cov tebchaw nyuaj, nrog rau lub zog thiab tawv ntawm cov hlau, thiab yog nyob rau hauv nruab nrab ntawm cov tawv tawv thiab cov hlau. Txawm li cas los xij, feem ntau siv cov ntsiab lus ntxiv rau cov ntawv khi yog cov hlau tsis tshua muaj xws li npib tsib xee thiab chromium, thiab cov hmoov hlau metallurgy txoj kev, impregnation txoj kev, kub nias txoj kev, kub isostatic nias txoj kev, tshuaj tsuag txoj kev, sib tov thiab nplawm casting txoj kev thiab plasma melting hmoov txoj kev. yuav tsum tau. thiab lwm txoj kev ua.
(5) Qhov nruab nrab thiab qis alloy hnav-resistant steel muaj cov qauv zoo hnav-tiv taus, uas tuaj yeem muab siab hardness thiab txaus toughness. Cov txiaj ntsig tshawb fawb qhia tau tias:①Lub lath martensite muaj cov pob txha me me thiab cov kua muag ntau dua thaum lub sij hawm quasi-cleavage fracture, uas siv cov pob txha ua haujlwm, yog li txhim kho cov tawv nqaij.②Cov bainite qis siv ferrite laths nrog cov kev taw qhia sib txawv raws li qhov tsawg kawg nkaus tawg chav tsev, thiab nws cov toughness yog siab dua li tempered martensite nrog tib hardness.③Khaws austenite muaj nyob rau hauv martensite lossis qis dua bainite qauv, uas tuaj yeem so kev ntxhov siab, cuam tshuam kev tawg, ua kom lub zog nqus thaum cov khoom tawg, thiab txhim kho toughness.④Fine thiab dispersed carbides yog qhov zoo rau hnav tsis kam.
Cov quenched microstructures nyob rau hauv nruab nrab thiab qis alloy steels muaj xws li martensite (lath, ntawv), bainite, khaws cia austenite thiab carbides, thiab cov saum toj no microstructures tuaj yeem tau. Cov ntsiab lus ntawm cov ntsiab lus ntawm cov hlau (cov khoom loj) ntawm cov hlau no yog tsawg, feem ntau cov hlau tsis tshua muaj hlau yog 3 feem pua rau 15 feem pua, cov hlau nruab nrab hlau yog 6 feem pua rau 18 feem pua, thiab cov hlau ntxiv yog cov nplua nuj nyob hauv tsev, uas yog yooj yim rau nrov thiab thov; High hardness, kev ua tau zoo ntawm cov toughness txaus, nyob rau hauv cov ntaub ntawv ntawm hardness> 50HRC, toughness. Tus nqi tuaj yeem ncav cuag 20-40J / cm, thiab kev sib raug zoo ntawm hardness thiab toughness tuaj yeem tswj tau ntau yam. Nws tuaj yeem tau txais kev hnav zoo nyob rau hauv ntau yam kev hnav abrasive, thiab muaj daim ntawv thov dav dav thiab qhov tseem ceeb ntawm kev txhawb nqa. .
