Toyota Jidosha Kabushiki Kaisha

Mec International Co., Ltd.

Setsuyu Hayakawa

Yuichi Furukawa

Takeshi Matsuo

Takaaki Niinomi

Kyosuke Yoshimi

Toshio Uchida

Mitsuo Suzuki

An object is to propose a mold release agent improving the state of a mold surface by repeating casting cycle so as to extend the life of the metal mold actively, and a casting method using the mold release agent. A water-soluble mold release agent applied on a mold surface of a metal mold contains organic acid or organic acid salt which is reducing and ligand, wherein concentration of a total thereof is not less than 0.01 wt % in using concentration and is not more than a fixed concentration which is stability limit of emulsion of the mold release agent in undiluted concentration. Construction weight ratio of the organic acid or organic acid salt which is reducing and the ligand is in the range from 99/1 to 30/70. The mold release agent is applied on a mold surface of a die casting metal mold, molten metal is injected into the metal mold, and the organic acid or organic acid salt which is reducing in the mold release agent is reacted with a component of the mold surface so as to deoxidize FeOon the mold surface to FeO.

Mold release agent and casting method

A metal material that is, without using expensive apparatus, carburized in a low temperature region where crystal grains do not grow so much, and a producing method of the metal material are provided. A metal material mainly containing iron, wherein a surface of the metal material is subjected to a carburization treatment by a treatment using fullerenes as a carbon source.

Carburized metal material and producing method thereof

Growing community of inventors

Nagoya, Japan

Setsuyu Hayakawa