Toyota Jidosha Kabushiki Kaisha

Nippon Steel Corporation

Yusuke Inukai

Manabu Kubota

Motoichi Murakami

Yuichiro Kajiki

Yusuke Morita

Takeshi Fukui

Tatsuhiko Abe

Satoru Okawa

A crankshaft with improved seizure resistance is provided. A crankshaft () is a crankshaft including journals () and pins (), having a chemical composition of, in mass %: 0.35 to 0.40% C; up to 0.70% Si; 1.00 to 2.00% Mn; up to 0.50% Cr; up to 0.050% Al; up to 0.020% N; up to 0.020% P; 0.005 to 0.200% S; and balance Fe and impurities, each of the journals () and pins () having a surface microstructure containing tempered martensite in not less than 80 volume % and a surface hardness not higher than HV 450.

Crankshaft

Growing community of inventors

Aichi-ken, Japan

Yusuke Inukai