高疲労強度板ばね用鋼及び板ばね部品

Title:

高疲労強度板ばね用鋼及び板ばね部品

Document Type and Number:

Japanese Patent JP5520591

Kind Code:

B2

Abstract:

Disclosed is steel for a leaf spring with high fatigue strength containing, in mass percentage, C: 0.40 to 0.54%, Si: 0.40 to 0.90%, Mn: 0.40 to 1.20%, Cr: 0.70 to 1.50%, Ti: 0.070 to 0.150%, B: 0.0005 to 0.0050%, N: 0.0100% or less, and a remainder composed of Fe and impurity elements. Also disclosed is a high fatigue-strength leaf spring part obtained by forming the steel. The steel for a leaf spring is prepared to have a Ti content and a N content to satisfy a relation of Ti/N¥10. Preferably, the leaf spring part is subjected to a shot peening treatment in a temperature range of the room temperature through 400°C with a bending stress of 650 to 1900 MPa being applied to it.

Inventors:

Atsushi Sugimoto
Kiyoshi Kurimoto
Akira Tange
Yurika Goto
Mamoru Akeda

Application Number:

JP2009287175A

Publication Date:

June 11, 2014

Filing Date:

December 18, 2009

Export Citation:

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