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Development of High-strength Induction Hardened Crankshaft

Article of Honda R&D Technical Review Vol.15 No.2


A high fatigue strength and wear resistance induction hardened crankshaft has been developed for diesel engines. Crankshafts for use in diesel engines must be engineered to tolerate the high loads generated by high in-cylinder pressures, and be capable of resisting wear caused by the carbon which collects in the lubricating oil as a combustion by-product. Simultaneous hardening of the shaft and the fillet has been adopted in the newly developed crankshaft to achieve high strength while reducing the number of production processes, resulting in the development of a crankshaft with excellent fatigue strength, resistance to wear, and mass producibility. A special material was developed for the crankshaft to enable the curvature occurring during induction hardening of the fillet to be easily corrected. In addition, control of inclusions in materials has enabled the lead component, conventionally added to increase machinability, to be removed without sacrificing workability.


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Author (organization or company)

Hayato ONDA(Tochigi R&D Center)、Tetsuya ASAI(Tochigi R&D Center)、Kenji FUJIKI (Tochigi R&D Center)、Hirotsugu KUDO(Tochigi R&D Center)、Kazumasa MUROFUSHI(Tochigi R&D Center)

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