1. Cov ntsiab lus txhais tau thiab cov khoom siv ntawm ib519 8742 steel yeeb nkab
Ib qho 519 8742 yog ib qho ultra {1} {{} chromium rooj plaub {} {{} {tawv tawv steel). Nws cov tub ntxhais muaj pes tsawg leeg yog:
Carbon (0.20% -0.25%): Lub zog yooj yim thiab muaj peev xwm carburizing
Nickel (0.40%- 0.70%): Txhim kho cov tub ntxhais kev ua tau zoo thiab kev ua kub kub tsawg
Chromium (0.40% -0.60%) + Molybdenum (0.20% -0.30%): txhim kho cov khoom siv tsis kam
Los ntawm kev carburizing thiab quenching txheej txheem, lub qhov saum npoo hardness tuaj yeem ncav cuag HRC 58-62, thaum lub luag haujlwm ruaj khov (tensile lub zog ntau dua lossis sib npaug nrog 1200 MPA). Tsim los rau cov nra hnyav thiab cov kev ua kom muaj kev sib txawv. 2.}} kev lag luam thiab kev lag luam zoo
Kev tiv thaiv thiab kev tiv thaiv: lub qhov siab loj lub zog, dav hlau dav hlau tsaws iav Bearings
Kev lag luam sib tw: Kev sib tw siab {- Kev ua haujlwm kis tau lub zog, Universal Sib Koom Tes Sib Koom Tes
Cov Khoom Siv Hluav Taws Xob: Sib sib zog nqus -} Hiav txwv drilling cuab yeej, cua hiav txwv
Nco tseg: Lub Carburized txheej qhov tob yog tswj hwm (0.5-24) sib txawv los ntawm cov hlau ua kom tawv nqaij (piv txwv li, {{4 4}})
Cov ntsiab lus Molybdenum siab dua: Txhim kho qhov siab - kub lub zog thiab creep tsis kam
Nickel - chromium synergistic nyhuv: kev cuam tshuam lub zog ntawm -50℃tau dhau 30% zoo dua li8620 steel
Kev qaug zog lub neej: sib cuag kev ua kom rog rog tau nce los ntawm 20% -25% tom qab carburizing
4. Cov ntsiab lus tseem ceeb rau kev ua thiab kho cua sov
Txheej Txheem Carburizing:
930 depree roj carburizing yog pom zoo, nrog cov pa cab muaj peev xwm tswj tau ntawm 0.8% thiab 1.0%
Kev sib sib zog nqus carburizing yuav tsum tau staged diffusion (piv txwv li, 930℃ua raws 850 degree)
Vuam kev txwv:
Vuam tsuas yog nyob rau hauv anealed xeev, preheating rau 200-250 degree
Vuam tom qab carburizing yog nruj me ntsis txwv (tuaj yeem ua rau tawg hauv cov txheej carburized)
Xov Xwm Tshaj Tawm Xov Xwm:
Zom nrog CBN log tom qab carburizing kom tsis txhob muaj saum npoo overheating
5. Nruj cov qauv pov thawj zoo
Kev Ntsuas Kuaj: Cov ntsiab lus txog Nickel yuav tsum muaj ntau dua los yog sib npaug rau 0.4% (aviation-} qib yuav tsum muaj ntau dua lossis sib npaug rau 0.5%)
Kev Kuaj Xyuas:
Cov tub ntxhais muaj tawv (HRC) 30-40 (kom muaj kev nyuaj)
Carburized txheej hardness gradient (HV0.3 txo qis nkhaus los ntawm saum npoo rau cov tub ntxhais)
Nondestructive Testing:
100% fluorescent penetrant kuaj (Ams 2644 txuj)
Cov Cheebtsam Cov Cheebtsam yuav tsum tau dhau mus ntxaij qaug zog kev sim (ntau dua lossis sib npaug rau 10 teev
