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Title:
HIGH-STRENGTH SPRING STEEL
Document Type and Number:
WIPO Patent Application WO/2011/078165
Kind Code:
A1
Abstract:
Provided is a spring steel that contains 0.15-0.40% carbon, 1-3.5% silicon, 0.20-2.0% manganese, 0.05-1.20% chromium, at most 0.030% phosphorus, at most 0.02% sulfur, and at least one of the following: 0.005-0.10% titanium, 0.005-0.05% niobium, and at most 0.25% vanadium. The remainder of said spring steel comprises iron and unavoidable impurities. The carbon equivalent (Ceq1) of the provided spring steel, as calculated by formula (1), is at most 0.55. (1) Ceq1 = [C] + 0.108×[Si] − 0.067×[Mn] + 0.024×[Cr] − 0.05×[Ni] + 0.074×[V] (In formula (1), each symbol in brackets represents the content (mass%) of the corresponding element.)

Inventors:
NAGAMATSU, Sayaka (())
永松 清佳 (())
MARUO, Tomotada (())
Application Number:
JP2010/073003
Publication Date:
June 30, 2011
Filing Date:
December 21, 2010
Export Citation:
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Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO (10-26, Wakinohama-cho 2-chome Chuo-ku, Kobe-sh, Hyogo 85, 〒6518585, JP)
株式会社神戸製鋼所 (〒85 兵庫県神戸市中央区脇浜町二丁目10番26号 Hyogo, 〒6518585, JP)
NAGAMATSU, Sayaka (())
永松 清佳 (())
International Classes:
C22C38/00; C21D9/02; C22C38/38; C22C38/58; C21D7/06
Foreign References:
JP2001049337A
JPH11323495A
JP2004263247A
JP2009046764A
JP4406341B2
JP3577411B2
JP3246733B2
Other References:
See also references of EP 2518175A4
Attorney, Agent or Firm:
TANAKA, Mitsuo et al. (AOYAMA & PARTNERS, IMP Building 3-7, Shiromi 1-chome, Chuo-ku, Osaka-sh, Osaka 01, 〒5400001, JP)
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