Toyota Jidosha Kabushiki Kaisha

Dowa Thermotech Co., Ltd.

Mitsue Koga

Tomohiko Nishiyama

Takahiro Fujita

Masayoshi Ikeyama

A heat treatment apparatus includes: a treatment chamber unit that is, inside a furnace shell, detachably fixed to the furnace shell; and a power supply portion, in which the treatment chamber unit includes: a treatment container in which a heat treatment is performed on a workpiece; a heat insulating material provided inside the treatment container; a heater that has a heating element located inside the treatment container and has a terminal located outside the treatment container; and a busbar that is provided on the outside of the treatment container and is electrically connected to the terminal of the heater, the power supply portion is provided outside the treatment container, and the busbar and the power supply portion are detachably connected to each other.

Heat treatment apparatus

Provided is an endless metal ring manufacturing method for manufacturing an endless metal ring by carrying out a barrel polishing step for polishing the endless metal ring by using a barrel of a resin material, a rolling step for rolling the endless metal ring which was cleaned, and a nitriding step for nitriding the endless metal ring which was rolled, wherein after the barrel polishing step and before the rolling step, provided is a resin removing step for removing resin that has adhered to the endless metal ring.

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Toyota, Japan

Mitsue Koga