Title:
METHOD FOR MANUFACTURING SPRING FOR SUSPENSION DEVICE, AND SPRING FOR SUSPENSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/158408
Kind Code:
A1
Abstract:
This method for manufacturing a spring for a suspension device is characterized by including a molding step S10 for molding a steel member that contains, in mass%, C: 0.10-0.39%, Mn: 1.00-1.50%, and B: 0.0005-0.003% in hot or cold molding to a spring shape, and a quenching step S20 for carrying out quenching of the molded steel member using a medium having a heat transfer coefficient about equal to that of water or close to that of water, without the steel member subjected to quenching being tempered at 400°C or above.
Inventors:
TANGE AKIRA (JP)
KURIMOTO KIYOSHI (JP)
KURIMOTO KIYOSHI (JP)
Application Number:
PCT/JP2016/058284
Publication Date:
October 06, 2016
Filing Date:
March 16, 2016
Export Citation:
Assignee:
NHK SPRING CO LTD (JP)
International Classes:
C21D9/02; B60G11/04; B60G11/14; C21D1/60; C22C38/00; C22C38/04; C22C38/60; F16F1/02
Domestic Patent References:
| WO2011129179A1 | 2011-10-20 |
Foreign References:
| JPH0116889B2 | 1989-03-28 | |||
| JP2008202124A | 2008-09-04 | |||
| JP2009256771A | 2009-11-05 |
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P. C. (JP)
Patent business corporation Isono international patent trademark office (JP)
Patent business corporation Isono international patent trademark office (JP)
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