Neturen Co., Ltd.

Nihon Parkerizing Co., Ltd.

Yoshihiro Ikeda

Kazuhiro Kawasaki

Yoshitaka Misaka

Arata Suda

Masaaki Beppu

Kengo Fukazawa

Providing an iron and steel material having quenched surface part, avoiding oxidation of a compound layer formed on the surface of the iron and steel material due to quenching, its production method, and an induction-quenched component. A quenched iron and steel materialcomprises an iron and steel material, a compound layerformed on the iron and steel material, and an antioxidant cover layerformed on the compound layer. The iron and steel materialhas a hardened layer having a given depth, and the surface of the iron and steel materialhas enhanced hardness. A method for producing the iron and steel materialcomprises a first step for forming the antioxidant cover layerto cover the compound layerformed on the iron and steel material, and a second step for applying induction hardening to the iron and steel materialhaving the compound layerand the antioxidant cover layer, with the temperature increased in a given heating time until the given heating temperature is reached, and with cooling immediately performed once the heating temperature is reached.

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Chuo-ku, Japan

Yoshihiro Ikeda