1. Cov ntsiab lus txhais tau thiab cov khoom siv ntawm ib519 8655 steel yeeb nkab
A 519 8655 yog ib qho ultra-}}}} molybdenum {}} vanadium alloy hlau). Nws cov tub ntxhais muaj pes tsawg leeg yog:
Cov pa roj carbon (0.50% -0.60%): Muab cov theem pib hardness thiab lub zog
Chromium (0.70% - 0.90%) + Molybdenum (0.15% -0.25% hloov kho lub zog thiab kub-zog
Vanadium (0.10% -0.20%): Rov ua kom loj dua, txhim kho kev ua kom nruj thiab hnav tsis kam
Tom qab quenching thiab tempering kub kev kho mob (quenching + tempering), ua kom haum rau kev siv hauv cov ntaub ntawv zoo thiab cov ntsiab lus zoo
Kev Ua Tub Rog Kev Lag Luam: Cov Cuab Yeej Tsheb Ntaus Pob Pins, Artillery Feloil Khoom Siv
Cov Khoom Siv Zog: Ultra- dusple tob laum dlars, shaale roj av pob roj av
Cov Machinery: Tsuas yog crusher ntxaiv, loj stamping tuag
Nco tseg: Cov neeg dispersed carbides tsim los ntawm Vanadium cov lus hais tawm, nce li 4140) {3} {lub zog steels (piv txwv li, 4340)
Cov ntsiab lus Chromium: Txhim kho corrosion tsis kam, haum rau cov chaw nres nkoj hiav txwv
Vanadium Microoalloying: Loj hlob zoo dua siab - kub lub zog (800 MPa ntawm 500 Mpa kom deb)
Nqe - Kev Ua Tau Zoo Li Cas: Tus nqi qis dua Generiation-}
4. Cov ntsiab lus tseem ceeb hauv kev ua thiab kho cua sov
Txheej Txheem Kho Kom Kub:
Quenching: 840-870°C with Oil Cooling (Water Quenching is Required for Sections >75 hli)
Tempering: 450-550 Qib (kho kom haum rau hardness yuav tsum tau, cov zog 35-42 hrc)
Yuav tsum muaj cov vuam ua vuam:
Preheat kub 280 {- 320 degree, post-weld dehydrogenation kev kho mob ntawm 620℃rau 2 teev
Pom zoo Vuam Cov Khoom Siv: AWS E9018- g (sib xws nrog cov dej num high-zog yuav tsum tau)
Machining Cov Lus Taw Qhia:
Rau quenched thiab tempered machining, ceramic - Coated cov cuab yeej yog nyiam, thiab cov kev txiav dej yuav tsum muaj lubricity siab.
5. Nruj me ntsis kev lees paub cov qauv
Kev Kuaj Xyuas Kev Kuaj: Vanadium cov ntsiab lus yuav tsum muaj ntau dua lossis sib npaug rau 0.10% (icp spectroscopy tsom)
Cov Khoom Siv Neeg Kho Tshuab:
Paib lub zog ntau dua los yog sib npaug rau 950 mpa, elongation ntau dua los yog sib npaug rau 10%
Charpy V -} negch cuam tshuam lub zog ntawm -40℃ntau dua los yog sib npaug ntawm 25j
Tsis - Kev sim:
Kev sim ultrasonic (ua raws li API 5ct p110 qib)
Metallographic kev ntsuam xyuas ntawm cov nplej loj (astm E112 qib siab dua lossis sib npaug rau 8)
