Title:
STEEL FOR INDUCTION HARDENING AND CRANKSHAFT MANUFACTURED USING SAME
Document Type and Number:
WIPO Patent Application WO/2012/029395
Kind Code:
A1
Abstract:
Provided is steel for induction hardening that is less likely to develop cracks and has excellent hardness and anti-seizing properties, even when not tempered after induction hardening. The steel for induction hardening fulfills formula (1) and comprises, in percent by mass: 0.20-0.34% C, 0.20% or less Si, 0.75-2.0% Mn, 0.03% or less P, 0.20% or less S, 0.05-1.2% Cr, 0.002% to less than 0.030% Ti, 0.005-0.04% Al, and 0.0040-0.020% N, with the remainder comprising Fe and impurities.
1.20≦Mn+Cr≦2.10 (1). The amount of each chemical element (percent by mass) is substituted for each of the chemical symbols in the formula (1).
Inventors:
MIZOBE YUTA (JP)
TAHIRA HIROAKI (JP)
YOSHINO KEN (JP)
TAHIRA HIROAKI (JP)
YOSHINO KEN (JP)
Application Number:
PCT/JP2011/064709
Publication Date:
March 08, 2012
Filing Date:
June 27, 2011
Export Citation:
Assignee:
SUMITOMO METAL IND (JP)
MIZOBE YUTA (JP)
TAHIRA HIROAKI (JP)
YOSHINO KEN (JP)
MIZOBE YUTA (JP)
TAHIRA HIROAKI (JP)
YOSHINO KEN (JP)
International Classes:
C22C38/00; C21D1/18; C21D9/30; C22C38/60; F16C3/06
Foreign References:
| JP2005264265A | 2005-09-29 | |||
| JP2000026933A | 2000-01-25 | |||
| JP2005256134A | 2005-09-22 | |||
| JPS6436779A | 1989-02-07 |
Attorney, Agent or Firm:
UEBA Hidetoshi et al. (JP)
Hidetoshi Ueha (JP)
Hidetoshi Ueha (JP)
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Claims: