Title:
STEEL SHEET FOR HOT PRESSING, HOT-PRESS-MOLDED ARTICLE IN WHICH SAID STEEL SHEET IS USED, AND METHOD FOR MANUFACTURING SAID ARTICLE
Document Type and Number:
WIPO Patent Application WO/2015/194571
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a steel sheet for hot pressing with which it is possible to achieve exceptional ductility after hot pressing. This steel sheet for hot pressing contains specific amounts of C, Si, Mn, Cr, P, S, Al, Ti, B, and N, the balance being iron and unavoidable impurities; and, as shown below, has a carbon equivalent Ceq of 0.43-0.7% and an Ms point of 415°C or more. Ceq=[C]+[Mn]/6+[Si]/24+[Ni]/40+[Cr]/5+[Mo]/4+[V]/14 (1)
Ms(°C)=550–361[C]–39[Mn]-10[Cu]–17[Ni]-20[Cr]–5[Mo]+30[Al] (2)
Inventors:
MURAKAMI TOSHIO
NAITOU JUNYA
NAITOU JUNYA
Application Number:
PCT/JP2015/067363
Publication Date:
December 23, 2015
Filing Date:
June 16, 2015
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C22C38/00; B21D22/20; C21D1/18; C21D9/00; C21D9/46; C22C38/34; C22C38/54; C22C18/04
Domestic Patent References:
| WO2012120692A1 | 2012-09-13 | |||
| WO2012137687A1 | 2012-10-11 |
Foreign References:
| JP2012092365A | 2012-05-17 | |||
| JP2013194249A | 2013-09-30 | |||
| JP2006152427A | 2006-06-15 |
Attorney, Agent or Firm:
Eikoh Patent Firm, P. C. et al. (JP)
Patent business corporation glory patent firm (JP)
Patent business corporation glory patent firm (JP)
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