1. Cov khoom txhais thiab cov khoom tseem ceeb
Q: Dab tsi yog ovm 519 5120 cov yeeb nkab?
A:
5120 cov yeeb nkab steel yog cov roj carbon chomium chomium alloy steel seamless yeeb (tsis yog G51200) teev nyob rau hauv Astm ATTM A519 tus qauv. Nws cov tub ntxhais muaj pes tsawg leeg yog 0.17% -0.222% carbon thiab 0.70% -0.90% chromium. Muaj zog los ntawm cov chromium carbides, cov khoom no sib xyaw ua ke ua haujlwm zoo (roj quenching tseem ceeb tshaj plaws ntawm lub zog (rooj plaub hardness 58-62 hrc). Nws yog tus cwj pwm los ntawm cov tseem ceeb tseem ceeb tom qab carburizing lub zog loj dua los yog sib npaug nrog cov khoom siv hluav taws xob siab dua lossis sib npaug rau cov khoom siv hluav taws xob ntau dua.
2. Cov Khoom Siv Cov Neeg Kho Tshuab thiab Cov Lus Qhia
Q: Qhov ntsuas tau ua tiav ntawm 5120 cov yeeb nkab steel? A:
Nyob rau hauv carburized, quenched, thiab tsawg-kub lub xeev:
Cov Khoom Nto: Hardness Hrc 58-62, hu rau kev qaug zog tsis tshua muaj ntau dua lossis sib npaug rau 1500 MPa
Cov Khoom Siv: Tensile lub zog ntau dua lossis sib npaug nrog 850 MPa, cov zog rau 700 mpa, chav-kub cuam tshuam lub zog loj dua lossis sib npaug nrog 50j
Cov khoom tshwj xeeb: khoov rog rog (10⁷ musnas dag) 50% -55% ntawm tensile lub zog, carburized deformation tsawg dua los yog sib npaug rau 0.05mm / m
3. Cov ntawv thov raug
Q: Qhov kev siv ntawm 5120 cov yeeb nkab tseem ceeb dab tsi?
A:
Kev Lag Luam Automotive: Cov Tsheb Sib Kis Lub Zog, Cov Khaub Ncaws Loj Loj (Cov Ntaub Ntawv Carburgais 58-1.2mm)
Machinery: Agricultural machinery Tsav Shafts, Industrial Gearage Housings
Qhov chaw dav dav: cov kabmob rings, kev siv lub cev muaj zog hydraulic (yuav tsum muaj saum npoo hardening)
4. Cov ntsiab lus tseem ceeb hauv kev kho cua sov thiab kev ua
Q: Kuv tuaj yeem ua kom zoo dua kev kho cua sov thiab kev ua haujlwm ntawm 511 cov yeeb nkab steel? A:
Cov txheej txheem pom zoo ua ke:
Roj carburizing (930℃x 6h, carbon, app% -1.0%) + direct quenching
Vuam: Siv ER70S-6 VUAM HLAU, Preheat rau 150-200 Qib
Tig: Siv Tialn-Coated Cuab Yeej (Txiav Ceev 100-120 m / min)
Kev tswj tseem ceeb: Zam kom qeeb qeeb hauv 600-800℃ntau yam, uas tuaj yeem ua rau cov nplej oxidation.
5. Piv nrog cov ntaub ntawv zoo sib xws
Q: Dab tsi yog qhov txawv ntawm 5120, 5115, thiab 8620 steel yeeb nkab?
A:
vs {. 5115: 5120 muaj cov ntsiab lus carbon ntau dua (0.17% -0.22% vs {%, ua rau 20% nce ntxiv hauv kev ua haujlwm ntawm cardability tab sis me ntsis qis dua me ntsis.
vs {. 8620: 5120 tsis muaj npib tsib:
