Title:
SPRING HAVING EXCELLENT CORROSION FATIGUE STRENGTH
Document Type and Number:
WIPO Patent Application WO/2012/093506
Kind Code:
A1
Abstract:
This spring has a Rockwell hardness of HRC 53 to HRC 56. If the Rockwell hardness of the spring is denoted as H, in a Rockwell hardness range of HRC 53 to HRC 56, the dislocation density ρ (cm-2) satisfies formula (1), and the prior austenite grain size number is no. 10 or higher. (Formula 1) ρ ≥ 1.4 × 1011 × H - 6.7 × 1012
Inventors:
KUNO TAKANORI (JP)
WAKITA MASAMI (JP)
WAKITA MASAMI (JP)
Application Number:
PCT/JP2011/068916
Publication Date:
July 12, 2012
Filing Date:
August 23, 2011
Export Citation:
Assignee:
CHUO HATSUJO KK (JP)
KUNO TAKANORI (JP)
WAKITA MASAMI (JP)
KUNO TAKANORI (JP)
WAKITA MASAMI (JP)
International Classes:
C22C38/00; C22C38/46; F16F1/02; C21D7/06; C21D9/02; C22C38/54
Foreign References:
| JP2001220650A | 2001-08-14 | |||
| JP2000282176A | 2000-10-10 | |||
| JPH05271879A | 1993-10-19 |
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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