Topy Kogyo Kabushiki Kaisha

Weidong Xue

Kiyokazu Niwa

Nobuyuki Suga

Daisuke Nojo

Yugo Takeuchi

Kenzo Uchida

Seiji Nobata

Ryuhei Masuda

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 relates to a method for heat treatment of a columnar work. In order to provide the method for heat treatment of a columnar work being able to attain a high productivity, a reduction of cost, and an improvement of quality, as compared with the prior art, the method for heat treatment of a columnar work of the present invention includes a quench-hardening step (S) and a tempering step (S) being carried out after the quench-hardening step (S), the quench-hardening step (S) includes a first quench-hardening step (S) and a second quench-hardening step (S) being carried out after the first quench-hardening step (S), the entire region of the columnar work () from an outer circumferential surface () to a core thereof (), or a partial region thereof, is heated up to a temperature not lower than a transformation temperature Ac, and then, the work is quench-hardened.

Heat treatment method of pin for endless track

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Tokyo, Japan

Weidong Xue