Piv nrog rau cov pa roj carbon hlau thiab qee cov roj txhuas qis, 39nicrmo3 steel muaj alloy, chromium, thiab molybdenum, uas ua rau nws muaj cov khoom siv tsis yooj yim. Thaum lub sij hawm quenching, ib tus qauv sib tw sib tw tuaj yeem tau txais nyob ntawm qhov chaw hla kev loj dua. Piv txwv li, thaum ua kom loj loj 39Nnicrmo3 Shafts lossis zog, nws tuaj yeem ua kom muaj cov nyhuv zoo los ntawm qhov chaw rau cov tub ntxhais. Tib neeg cov pa roj carbon hlau tsuas yog ua kom tawv rau saum npoo av, thiab cov tub ntxhais tseem yog tus qauv muag muag.
Cov khoom siv alloy hauv 39NicRMo3 steel tuaj yeem nce cov recrystallization kub ntawm cov hlau. Thaum rhuab kub, nws cov nplej loj hlob ib txwm yog me me, kom nws muaj cov tshuaj tiv thaiv zoo heev. Hauv kev sib piv, qee cov hlau zoo tib yam yog nquag ua kom cov nplej ua kom sov thaum lub sijhawm kev kho cua sov kub thaum sov, ua rau txo qis kev ua tau zoo.
Thaum lub sij hawm lub sijhawm tempering, 39nicrmo3 steel tuaj yeem tswj lub zog zoo thiab hardness ntawm ntau dua qhov kub thiab muaj qhov ua tau zoo ruaj khov. Piv nrog qee cov pa roj carbon hlau, 39nicrmo3 steel tuaj yeem ua rau muaj kev ntxhov siab ntau dua thaum tseem muaj zog, thaum muaj cov txheej txheem hluav taws xob siab yuav cuam tshuam nyuaj.
39Nicrmo3 steel yog haum rau nitrived. Tom qab nitriving, ib txheej nitrived nrog siab tawv, zoo coj tsis kam thiab corrosion tsis kam tuaj yeem tsim nyob rau saum npoo, ntxiv txhim kho cov kev ua tau zoo ntawm qhov chaw. Nws yog qhov haum rau lub sijhawm uas muaj cov kev xav tau siab heev, xws li qee qhov tseem ceeb ntawm cov hlau tshuab, uas muaj ntau cov hlau txawv tsis muaj.
Tshuaj lom neeg muaj pes tsawg leeg% ntawm steel 39nicrmo3 (1.6510): en 10277-5-2008
| C | Si | Mn | Ni | P | S | Cr | Mo |
| 0.35 - 0.43 | Max 0. 4 | 0.5 - 0.8 | 0.7 - 1 | Max 0. 025 | Max 0. 035 | 0.6 - 1 | 0.15 - 0.25 |
39NicRMO3 Kev Kho Tshav Kub Kub
- Muag muag Annaling: Thaum tshav kub rau 650-690 degree, ces maj mam txias rau hauv cov hlau, uas yooj yim rau kev ua tiav tom ntej. Lub hardness feem ntau qis dua 240hbw.
- Li no: cua sov rau 860-880 degree thiab cua txias. Nws tuaj yeem txhim kho tus qauv thiab txiav cov qauv ntawm cov hlau, ua kom cov nplej, thiab nce lub zog thiab tawv.
- Quenching: Thaum tshav kub rau 830-850 degree, ces nrawm nrawm nws hauv dej lossis roj kom tau txais martensic qauv. Nws yuav txhim kho hardness thiab lub zog, tab sis txo nruj.
- Tempering: Tom qab quenching, ua kom sov cov hlau rau 540-630 degree. Raws li cov txheej txheem sib txawv thiab qhov ntsuas kub, lub zog ua kom pom tseeb kom tshem tawm cov qauv kev ntxhov siab thiab qhov loj me, thiab tiv thaiv deformation thiab tawg.
Hardness ntawm 39nicrmo3 steel nrog txawv diameters tom qab quenching thiab tempering
- Txoj kab uas hla tsawg dua lossis sib luag rau 16 hli, lub brinell hardness HB yog nruab nrab ntawm {1}}.
- Qhov uas hla ntawm 16-40 hli, lub brinell hardness HB yog nruab nrab ntawm {1}}.
- Qhov uas hla ntawm 40-100 hli, lub brinell hardness HB yog nruab nrab ntawm {1}}.
- Qhov uas hla ntawm 100-160 hli, lub brinell hardness HB yog nruab nrab ntawm {1}}.
- Qhov uas hla ntawm 160-250 hli, lub brinell hardness HB yog nruab nrab ntawm {1}}.
