Title:
REFRACTORY STEEL MATERIAL WITH WELDED JOINT EXCELLENT IN UNSUSCEPTIBILITY TO REHEAT EMBRITTLEMENT AND TOUGHNESS AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2009/123076
Kind Code:
A1
Abstract:
A refractory steel material is provided which has excellent high-temperature strength and includes a welded joint excellent in unsusceptibility to reheat embrittlement and toughness. The material is produced from a steel which has a room-temperature strength in the 400-600 N/mm2 class and contains, as main components: 0.010-0.05%, excluding 0.05%, carbon; 0.01-0.50% silica; 0.80-2.00% manganese; 0.50-2.00%, excluding 2.00%, chromium; 0.03-0.30% vanadium; 0.01-0.10% niobium; 0.001-0.010% nitrogen; and 0.005-0.10% aluminum. The steel has limited contents of nickel, copper, molybdenum, and boron, and the following elements satisfy the relationship 4Cr[%]-5Mo[%]-10Ni[%]-2Cu[%]-Mn[%]>0.
Inventors:
HASEGAWA YASUSHI (JP)
MIZOGUCHI MASAKI (JP)
WATANABE YOSHIYUKI (JP)
YOSHIDA SUGURU (JP)
OKADA TADAYOSHI (JP)
MIZOGUCHI MASAKI (JP)
WATANABE YOSHIYUKI (JP)
YOSHIDA SUGURU (JP)
OKADA TADAYOSHI (JP)
Application Number:
PCT/JP2009/056411
Publication Date:
October 08, 2009
Filing Date:
March 24, 2009
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
HASEGAWA YASUSHI (JP)
MIZOGUCHI MASAKI (JP)
WATANABE YOSHIYUKI (JP)
YOSHIDA SUGURU (JP)
OKADA TADAYOSHI (JP)
HASEGAWA YASUSHI (JP)
MIZOGUCHI MASAKI (JP)
WATANABE YOSHIYUKI (JP)
YOSHIDA SUGURU (JP)
OKADA TADAYOSHI (JP)
International Classes:
C22C38/00; B21B3/02; C21D8/02; C22C38/58
Foreign References:
| JP2007277679A | 2007-10-25 | |||
| JP2007277680A | 2007-10-25 | |||
| JP2007119861A | 2007-05-17 |
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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