Steel wire for spring and method for manufacturing same

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United States of America Patent

PATENT NO 10294540
APP PUB NO 20150376731A1
SERIAL NO

14767996

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Abstract

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A steel wire for a spring, in which the sag resistance and the fatigue characteristics are improved by production processes without addition of alloy elements, is provided. The spring has a structure obtained by quenching and tempering and includes a first layer at a surface thereof, a second layer interior to the first layer, and a third layer, which is interior to the second layer and reaches a center of the spring, and the second layer has lower hardness than the first and the third layers.

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Patent Owner(s)

Patent OwnerAddress
HONDA MOTOR CO LTDTOKYO

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fuchigami, Hirokuni Saitama, JP 2 2

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