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Title:
HIGH-STRENGTH STAINLESS STEEL WIRE HAVING EXCELLENT HEAT DEFORMATION RESISTANCE, HIGH-STRENGTH SPRING, AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2013/146876
Kind Code:
A1
Abstract:
This high-strength stainless steel wire contains, by mass percent, C (0.02-0.12%), N (0.005-0.03%), where 0.05% ≤ (C + N) ≤ 0.13%, Si (0.1-2.0%), Mn (0.1-2.0%), Ni (6.8-9.0%), Cr (12.0-14.4%), Mo (1.0-3.0%), and Al (0.5-2.0%), the remainder being Fe and unavoidable impurities; the generated index MdS value for deformation-induced martensite being 15-60, the amount of deformation-induced martensite being 80-99 vol%, and tensile strength being 1800-2200 MPa. MdS = 551 - 462 (C + N) - 9.2 Si - 8.1 Mn - 29 (Ni + Cu) - 13.7 Cr - 18.5 Mo

Inventors:
TOHJOH MASAYUKI (JP)
TAKANO KOHJI (JP)
KAJIMURA HARUHIKO (JP)
AKIURA TSUNEO (JP)
TOYODA GOU (JP)
Application Number:
PCT/JP2013/058992
Publication Date:
October 03, 2013
Filing Date:
March 27, 2013
Export Citation:
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Assignee:
NIPPON STEEL & SUMIKIN SST (JP)
NIPPON SEISEN CO LTD (JP)
International Classes:
C22C38/00; B21C1/00; C21D8/06; C21D9/02; C22C38/58; F16F1/02
Foreign References:
JP2002146483A2002-05-22
JP2005298932A2005-10-27
JP2008248271A2008-10-16
JP2012097350A2012-05-24
JP4163055B22008-10-08
JPH1068050A1998-03-10
JP3482053B22003-12-22
JP4327601B22009-09-09
Other References:
TAKANO ET AL.: "Longitudinal Cracking in Metastable Austenitic Stainless Steels during Cold Drawing", JOURNAL OF THE IRON & STEEL INSTITUTE OF JAPAN, vol. 85, no. 3, March 1999 (1999-03-01), pages 229 - 235, XP055162944
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
Masatake Shiga (JP)
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