Title:
SPRING AND PROCESS FOR PRODUCING SPRING
Document Type and Number:
WIPO Patent Application WO/2015/064202
Kind Code:
A1
Abstract:
A spring which has improved fatigue strength is provided. A spring (10) has both a steel layer (12) and a compound layer (14) which is formed on the surface of the steel layer (12) and which contains a nitride. The compound layer (14) contains an ε phase, and the compressive residual stress of the ε phase is adjusted to 800 to 1400MPa.
Inventors:
YOSHIKAWA HIDETOSHI (JP)
Application Number:
PCT/JP2014/073059
Publication Date:
May 07, 2015
Filing Date:
September 02, 2014
Export Citation:
Assignee:
CHUO HATSUJO KK (JP)
International Classes:
F16F1/02; B24C1/10; C21D1/06; C21D7/06; C21D9/02; C22C38/00; C22C38/34; C23C8/26; C23C8/80
Foreign References:
| JP2000042922A | 2000-02-15 | |||
| JPH07214216A | 1995-08-15 | |||
| JPH07179985A | 1995-07-18 |
Attorney, Agent or Firm:
KAI-U PATENT LAW FIRM (JP)
Patent business corporation KAI-U Patent Law Firm (JP)
Patent business corporation KAI-U Patent Law Firm (JP)
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