Development of high fatigue strength spring steel

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To achieve high fatigue strength of small springs for automotive use, we have developed a new spring steel utilizing surface hardening of coil spring by nitriding. This newly developed spring has high internal hardness and fatigue strength that is more than 40 percent higher than that of conventional steel SAE9254.

Description

To achieve high fatigue strength of small springs for automotive use, we have developed a new spring steel utilizing surface hardening of coil spring by nitriding. This newly developed spring has high internal hardness and fatigue strength that is more than 40 percent higher than that of conventional steel SAE9254.

Additional information

Author(s)

Yoshirou Koyasu and Masato Yanase, Nippon Steel Corp.; Osamu Nakano, Toyota Motor Corp.; Yoshinobu Izawa, Togo Seisakusyo Corp.; and Mitsuyoshi Onoda, Suzuki Metal Industry Co., Ltd., Japan.

Publication/Event/Pages

Paper presented at WAI 65th Annual Convention, Atlanta, GA USA. Paper published in Wire Journal International, May 1996, pg. 88.

Year

1995