Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Yoshinari Tsuchiya

Toshiaki Tanaka

Hiroyuki Mori

Kazuyuki Nakanishi

Hideo Tachikawa

Fumio Shimizu

Tadashi Oshima

Yasuyuki Fujiwara

Takashi Iseki

Masazumi Onishi

Izuru Yamamoto

Atsushi Danno

Munehisa Matsui

Shintaro Igarashi

An amorphous carbon film includes carbon as a major component, and silicon in an amount of from 0.1 atomic % or more to 10 atomic % or less when the entire amorphous carbon film is taken as 100 atomic %. The carbon is composed of carbon having an sphybrid orbital in an amount of from 60 atomic % or more to 90 atomic % or less when the entire carbon amount is taken as 100 atomic %. Also disclosed is a process for producing the amorphous carbon film.

Amorphous carbon film, process for forming the same, and high wear-resistant sliding member with amorphous carbon film provided

A method for producing cast iron gears includes the steps of heating a blank composed of cast iron and having a teeth forming part to such a temperature that at least the teeth forming part is at least austenitized, and hot rolling the teeth forming part of the blank by pressing projecting teeth of a rolling machine against the teeth forming part which is in a hot state and within an austenitized range, while cooling the blank, thereby generating a teeth part in the teeth forming part of the blank. Hot rolling with a low plastic deformation resistance prevents lowering of strength due to the exposure of graphite particles of cast iron and occurrence of quenching cracks and rolling cracks, and improves gear accuracy.

Method for producing cast iron gear

Growing community of inventors

Kasugai, Japan

Yoshinari Tsuchiya