Other

Kurimoto, Ltd.

Higashi, Kenji

Kishiwada Stainless Steel Works

Keiichi Maekawa

Kenji Higashi

Yoshisada Michiura

Mitsuaki Kohara

Masayoshi Kitagawa

Takeyuki Asaoka

A threaded fastener lighter in weight and easier to produce is made by the moderate temperature-forging, from a raw magnesium material that contains microcrystals whose diameter is about 100 &mgr;m or less. The raw material may be pure magnesium of industrial grade in one case, and alternatively be any magnesium alloy or such a composition as comprising as its matrix the alloy or pure magnesium, in the other cases. The raw material has a superplastic property and a fine-granulated metallographic internal texture, and when making the fastener, will be heated to 250-400&deg; C. at which superplasticity takes place to facilitate the forging to form the fastener. A method proposed in the invention to make the fastener is thus such that the number of necessary processing steps is reduced and manufacture cost is lowered.

Threaded fastener and a method of making same

Growing community of inventors

Osaka, Japan

Keiichi Maekawa