Other

Dowa Thermotech Co., Ltd.

Shunzou Umegaki

Masahiro Suzuki

Youichi Watanabe

Ikuo Tani

Kiyotaka Akimoto

Keiji Yokose

Yuichi Heishi

Kiyota Akimoto

A maraging steel is subjected to the aging to have a hardness of more than 500 Hv. A nitrided case is formed to have a depth that is about 20% to 50% to a &frac12; thickness of the maraging steel plate. An endless ring for a metal belt is constructed by the above maraging steel. According to methods of manufacturing the maraging steel and the endless ring, the nitrided case having the depth that is 20% to 50% of a distance from a plate surface to a center can be formed by executing an aging to have the hardness of more than 500 Hv, then executing a nitriding in the nitrogen atmosphere to which organic chloride is added.

Nitrided maraging steel and method of manufacture thereof

Growing community of inventors

Yokohama, Japan

Shunzou Umegaki