Topy Kogyo Kabushiki Kaisha

Yugo Takeuchi

Kiyokazu Niwa

Daisuke Nojo

Nobuyuki Suga

Weidong Xue

Ryuhei Masuda

Yasuo Yoshida

Noboru Kakizawa

Takehiro Osugi

Takanori Yoshikawa

Seiji Nobata

Kenzo Uchida

Toshihiko Sato

The present invention addresses the issue of providing a heat treatment system and a heat treatment method whereby the inner circumference of a cylindrical workpiece can be reliably cooled regardless of the dimensions or shape of the workpiece and productivity can be improved, during quenching of the inner circumference of the cylindrical workpiece. The present invention has: rotating devicesthat rotate the cylindrical workpiece: holding membersthat hold the cylindrical workpieceat a prescribed position; a heating memberthat heats the cylindrical workpiecefrom the inner circumferential surface side; a cooling devicethat injects cooling fluid and cools the cylindrical workpiecefrom the outer circumferential surface side; and a injecting deviceprovided at a position separated from the cooling deviceand which inject the cooling fluid.

Heat treatment system and heat treatment method

The present invention is a press forging method by which porosities in a raw material are removed and mechanical properties such as ductility and toughness of a steel product are at a required level in a case that a steel ingot is treated as a raw material in press forging. A cylindrical steel ingot (a so-called 'round billet') is set onto a die as a raw material, and, a forging process is applied to the steel ingot so that buckling of the steel is not generated during the forging process and that a reduction ratio and a forging ratio are more than predetermined values, respectively.

Press forging method

Growing community of inventors

Tokyo, Japan

Yugo Takeuchi