Topura Co., Ltd.

Nhk Spring Co., Ltd.

Kouhei Miyamoto

Takeshi Suzuki

Noriyoshi Kaneda

Naoki Horiuchi

An aluminum alloy contains 0.7% to 1.8% of silicon, 0.5% to 2.1% of copper, 0.4% to 1.8% of manganese, 0.6% to 1.6% of magnesium, and 0.1% to 0.7% of zinc in terms of mass ratio and the balance aluminum with inevitable impurities.

Aluminum alloy and fastener member

By changing the timing of applying a heat treatment, a high-strength aluminum based alloy-made fastening part having an unprecedented tensile strength or other strength property and a method for manufacturing of the same are provided. The method is characterized in that an aluminum based alloy-made material is subjected to a solution treatment and is then age-hardened; work hardening is further applied to a shaft portion by drawing thereof in a heading process; and the shaft portion is thereafter subjected to a process of rolling male threads.

Growing community of inventors

Kanagawa, Japan

Kouhei Miyamoto