Title:
SPRING AND METHOD FOR MANUFACTURING SPRING
Document Type and Number:
Japanese Patent JP2015086890
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a spring having improved fatigue strength.SOLUTION: A spring 10 includes a steel material layer 12, and a compound layer 14 formed on a surface of the steel material layer 12 and containing nitride. The compound layer 14 includes an ε phase, which has a compressive residual stress of 800-1400 MPa.
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Inventors:
YOSHIKAWA HIDETOSHI
Application Number:
JP2013223529A
Publication Date:
May 07, 2015
Filing Date:
October 28, 2013
Export Citation:
Assignee:
CHUO HATSUJO KK
International Classes:
F16F1/02; B24C1/10; B24C11/00; C21D1/06; C21D7/06; C21D9/02; C22C38/00; C22C38/34; C23C8/26
Domestic Patent References:
| JP2000042922A | 2000-02-15 | |||
| JPH07214216A | 1995-08-15 | |||
| JPH07179985A | 1995-07-18 |
Attorney, Agent or Firm:
Kaiyu International Patent Office