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In this paper, we introduce the production of ductile iron crankshaft of the engine status quo and development.
Ductile iron crankshaft discussed smelting process, alloying and manufacturing process mode. This paper focuses on the
application of isothermal hardened spheroidal graphite cast iron in the crankshaft, especially its application in the power
of the engine crankshaft. We also introduce a way for casting production technique of high strength-high toughness
nodular iron crankshaft. In order to increase the strength, toughness of the nodular iron crankshaft and improve casting
quality, a series of investigations were carried out on the mini-amount alloying technique, control technique of iron melt
eutectic point, nodularizing treating technique, curved parting method and the structure normalization process and, as the
result, the high-strength and high toughness nodular iron crankshaft was successfully developed. The tensile strength of
the crankshaft was increased from original 872 MPa to 927 MPa.