Raws li peb cov kev paub dhau los hauv kev lag luam, peb xav qhia qee cov ntaub ntawv hais txog cov khoom siv raw thiab kev kho cua sov ntawm locomotive crankshafts.
Cov ntaub ntawv tseem ceeb rau cov cav tov diesel cav yog forged steel thiab cov hlau ductile. Forged steel crankshafts, vim lawv lub zog siab thiab toughness, yog dav siv nyob rau hauv niaj hnub high-power diesel locomotives. 42CrMoA thiab 42CrMo4 yog ib qho ntawm cov khoom siv dav tshaj plaws rau diesel locomotive crankshafts vim lawv lub zog siab thiab hardenability. Vim hais tias crankshafts dais loj loj alternating loads thaum lub sij hawm ua hauj lwm tiag tiag, cov ntaub ntawv raw yuav tsum muaj siab tensile thiab yield zog, elongation, txo ntawm cheeb tsam, thiab muaj feem xyuam rau lub zog. Tsis tas li ntawd, cov ntaub ntawv lawv tus kheej yuav tsum ua tau raws li qhov siab purity (hydrogen cov ntsiab lus thiab cov khoom tsis yog xim hlau, thiab lwm yam) thiab siab precision (ua tau raws li cov qauv kev lag luam railway xws li TB/T3475.1-2017). Cov txheej txheem kev kho cua sov (crankshaft dov, nto nitriding, thiab nruab nrab zaus induction hardening) kuj yuav tsum muaj qib siab hnav tsis kam thiab qaug zog. Vim muaj kev txwv tsis pub muaj thiab tsis xws luag, cov hlau hlau crankshafts tsis siv nyob rau hauv railway diesel locomotives.