SPRING AND METHOD FOR MANUFACTURING THE SPRING
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United States of America Patent
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Issued Date -
Jul 21, 2016
app pub date -
Sep 2, 2014
filing date -
Oct 28, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A spring, fatigue strength thereof is improved is provided. A spring 10 includes a steel layer 12 and a compound layer 14 provided on a surface of the steel layer and containing nitride. The compound layer 14 contains an ε phase, and a compressive residual stress of the ε phase is set to range from 800 to 1400 MPa.
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International Classification(s)
- C23C:COATING METALLIC MATERIAL; COATING MATERIAL WITH M....
- B24C:ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATE....
- F16F:SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRAT....
- C21D:MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS....
- C23F:NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM S....
- C22C:ALLOYS
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