Title:
MARTENSITIC STAINLESS STEEL SHEET FOR HEAT-RESISTANT DISC BRAKE HAVING EXCELLENT HARDENABILITY
Document Type and Number:
WIPO Patent Application WO/2007/029626
Kind Code:
A1
Abstract:
Disclosed is a martensitic stainless steel for heat-resistant disc brakes which
is excellent in hardenability and can be easily quench hardened at relatively
low temperatures while maintaining high heat resistance. This martensitic
stainless steel for heat-resistant disc brakes is characterized by having a
composition consisting of, in mass%, 0.05-0.10% of C, not less than 0.1% and not
more than 1% of Si, 0.2-2.0% of Mn, not more than 0.04% of P, not more than 0.010%
of S, 0.010-0.025% of N, 11-14% of Cr, 0.5-2% of Ni, 0.5-2% of Cu, 1-2% of Mo, 0.03-0.3%
of Nb, not more than 0.01% of Al, not more than 0.1% of Ti and the balance of Fe and
unavoidable impurities while satisfying that C + N is 0.06-0.1%. This martensitic
stainless steel for heat-resistant disc brakes is also characterized in that
γp obtained by the formula (1) below is not less than 80. γp = 420[%C]
+ 470[%N] + 23[%Ni] + 9[%Cu] + 7[%Mn] - 11.5[%Cr] - 11.5[%Si] -52[%Al] - 12[%Mo]
- 47[%Nb] + 189 (1)
Inventors:
INOUE YOSHIHARU (JP)
KIKUCHI MASAO (JP)
KIKUCHI MASAO (JP)
Application Number:
PCT/JP2006/317401
Publication Date:
March 15, 2007
Filing Date:
August 29, 2006
Export Citation:
Assignee:
NIPPON STEEL & SUMIKIN SST (JP)
INOUE YOSHIHARU (JP)
KIKUCHI MASAO (JP)
INOUE YOSHIHARU (JP)
KIKUCHI MASAO (JP)
International Classes:
C22C38/00; C21D9/00; C22C38/58; F16D65/12
Foreign References:
| JP2002146482A | 2002-05-22 | |||
| JP2005054217A | 2005-03-03 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chom, Minato-ku Tokyo 23, JP)
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