1. Cov yam ntxwv cov yam ntxwv thiab kev teeb tsa qauv
ASTM Attm 519 94 b15 yog qhov kev tsim tawm tsawg, zoo sib xws rau 4115 hlau, thiab conformed rau qhov tseeb aws aitm A519-2025 tus qauv. Nws cov tub ntxhais muaj pes tsawg leeg yog 0.15% carbon, 0.8-1.1% chromium, thiab 0.15-0.25% molybdenum. Nruj me ntsis cov lus faj sulfur thiab phosphorus cov ntsiab lus (tsawg dua los yog sib npaug rau 0.035%) thiab muaj kev sib luag rau (CE) tsawg dua lossis sib npaug nrog 0.35%). Cov khoom siv no yog tsim nyog rau cov ntawv thov, ua tiav kev sib xyaw ntawm cov npoo hardness (HRC}) thiab cov tub ntxhais.
2. Piv nrog cov ntaub ntawv zoo sib xws
94b15 muaj cov ntsiab lus carbon qis (0.15%) hauv A519 koob. Piv rau 94b17 (0.17% c) thiab 94b30 (0.30% c):
Cov txiaj ntsig zoo: Cov peev xwm ua haujlwm dhau los ua haujlwm (xws li hydroforming), tsis muaj preheating yuav tsum tau siv rau vuam (tuab <25m), thiab zoo dua carburizing kev sib dhos;
Cov kev txwv: Tsawg tawv, yog li ntawv ceev faj yog qhia rau tus ntoo khaub lig - seem thickinges> 50 hli.
Cov xwm txheej raug xaiv: 94b15 yog nyiam rau cov qauv kev nyab xeeb thiab muaj cov txheej txheem welded, thaum 94b30 yog pom zoo rau high} log Cheebtsam.
3. Cov ntawv thov tseem ceeb
Automotive: Rooj tog zaum caij nplooj ntoo hlav, lub zog hluav taws xob tshiab roj teeb hluav taws xob pob ntxiv (qis qis weld tawg tsis zoo);
Neeg kho tshuab Engineering: Hydraulic Valal Blocks, Textile Machinery Yarn Qhia (hnav tsis kam thiab xeb tsis kam);
Cov ntawv pov thawj tshwj xeeb: ua raws li EU en 10204 3.1 tus qauv, tso cai rau kev kho mob kho mob. 4. kev kho cua sov thiab nto hardening
Carburizing: 930 depree roj carburizing + ncaj qha quenching, hardened txheej tob tau kho tau los ntawm 0.3-0.8mm;
Corrosion tiv thaiv:
Qpq Salt da dej sib xyaw ua haujlwm (corrosion kuj nce 5x);
Electropcating zinc -} nickel alloy (haum rau cov tub rog ib puag ncig).
Cov Ntsiab Lus no: annealing hardness HB Tsawg dua lossis sib npaug rau 150, Tempering Kub 180-200 Qib X 2H.
5. Ua thiab Tswjhwm Saib Xyuas Cov Ntsiab Lus Tseem Ceeb
Txias ua haujlwm: Txwv tsis pub kos duab coefficient 0.55 (anealed yuav tsum tau), daim pam dawb huv 12% -15%;
Vuam: Mag vuam yog pom zoo siv ib qho Ar + 8% sib tov tsawg dua lossis sib npaug rau 10 kj / cm;
Yuav tsum tau xeem:
Kev Kuaj Ultrasonic Raws li Astm E213 Chav Kawm B;
Noob loj dua los yog sib npaug rau qib 5 (ASTM E112);
Lub 2025 tsab ntxiv ntxiv hydrogen -}} qhov kev sib tsoo (HIC) kev xeem.
