Zvichienderana neruzivo rwedu rweindasitiri, tinoda kugovera rumwe ruzivo nezve zvigadzirwa uye kupisa kupisa kwelocomotive crankshafts.
Iyo mikuru yemidziyo yedhiziri locomotive crankshafts isimbi yakaumbwa uye ductile iron. Forged steel crankshafts, nekuda kwesimba rayo rakakura uye kuomarara, anoshandiswa zvakanyanya mumagetsi emazuva ano ane simba redhiziri locomotives. 42CrMoA uye 42CrMo4 ndezvimwe zvezvinonyanya kushandiswa zvedhiziri locomotive crankshafts nekuda kwesimba radzo uye kuoma. Nekuti crankshafts inotakura mitoro mikuru inotsinhana panguva yekushanda chaiko, zvigadzirwa zvinofanirwa kuve nekunyanya kusimba uye kuburitsa simba, kurebesa, kudzikiswa kwenzvimbo, uye simba rekuita. Uyezve, zvinhu zvacho pachazvo zvinofanirwa kusangana nekuchena kwepamusoro (hydrogen content uye non-metallic inclusions, nezvimwewo) uye yakakwirira chaiyo (kusangana njanji indasitiri zviyero zvakadai TB / T3475.1-2017). Maitiro ekupisa kupisa (crankshaft rolling, surface nitriding, uye yepakati-frequency induction kuomesera) inodawo mazinga epamusoro ekuramba kupfeka uye kuramba kuneta. Nekuda kwekumisikidzwa uye hurema, ductile iron crankshafts haichashandiswi muchitima chedhiziri locomotives.