1. Cov ntsiab lus txhais tau thiab cov khoom siv ntawm ib519 8740 steel yeeb nkab
A 519 8740 yog lub siab {1} {} chromium roj av al ...- molybdenum txheej txheej alloy). Nws cov tub ntxhais muaj pes tsawg leeg yog:
Cov pa roj carbon (0.38% -0.43%): Muab cov theem pib hardness thiab lub zog
Nickel (0.40% - 0.70%): txhim kho kev ua tau zoo thiab tsawg-kub
Chromium (0.40% -0.60%) + Molybdenum (0.15% -0.25%): txhim kho cov kev siv zog thiab xeb tsis kam
Tom qab quenching thiab tempering kub kev kho mob (quenching + tempering), ua kom haum rau cov ntawv thov dynamic zoo thiab kev lag luam zoo
Aviation thiab Defense: Aircraft tsaws iav Cheebtsam, Missile Casings
Automotive: high - Performance crankshafts thiab tsav tsaj
Cov Khoom Siv Hluav Taws Xob: Roj Tho Khaub Ncaws, Hydraulic Turnbine Main Shafts
Nco tseg: nws qhov qis - kub heev (xws li sib luag ntau dua lossis sib npaug ntawm cov lej almoy (piv txwv li cov qhab nia zoo sib xws (piv txwv li ntawm 4340)
Txo cov ntsiab lus me me: txo qhov kev pheej hmoo ntawm weld tawg thiab txhim kho tshuab luam ntawv
Nickel - chromium - molybdenum tshuav nyiaj: ntawm sib npaug lub zog, 8740 tau siab dua pob zeb nyuaj
Tus nqi - ua tau hauj lwm zoo: muaj kev lag luam ntau dua aerospace {}}}}}, 300m hlau)
4. Cov ntsiab lus tseem ceeb ntawm kev ua thiab kho cua sov
Cov txheej txheem vuam:
Preheat kub 200 - 300 degree; Tam sim no Post-Weld Dehydrogenation kev kho mob
Pom zoo Vuam cov khoom siv: AWS E11018 - g (rau cov kev yuav tsum muaj zog siab)
Kev Kho Cua Sov:
Quenching: Roj txias ntawm 830-860℃(dej quenching rau cov ntu loj)
Tempering: yeem (hardness 28-35 hrc tom qab tempering ntawm 500-600 degree)
5. Cov qauv pov thawj zoo
Kev Kuaj Xyuas Kev Kuaj: Nickel, chromium, thiab molybdenum cov ntsiab lus yuav tsum ua raws li AMS cov qauv . 6415}}}}}}}}}}}}}}}}}}} kev qhia
Cov Khoom Siv Neeg Kho Tshuab:
Paib lub zog ntau dua los yog sib npaug rau 850 MPa, elongation ntau dua los yog sib npaug rau 12%
Charpy V - negch cuam tshuam lub zog kuaj ntawm -40 degree
Nondestructive Testing:
Kev Kuaj (ASTM A388)
Sib Nqus Particle soj ntsuam rau saum npoo tsis xws luag (Astm E709)
