Title:
AUSTENITIC HEAT-RESISTANT ALLOY AND WELDED STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2017/002523
Kind Code:
A1
Abstract:
Provided is an austenitic heat-resistant alloy capable of stably achieving excellent crack resistance and high-temperature strength. This austenitic heat-resistant alloy has a chemical composition including, in mass%, 0.04-0.14% C, 0.05-1% Si, 0.5-2.5% Mn, equal to or less than 0.03% P, less than 0.001% S, 23-32% Ni, 20-25% Cr, 1-5% W, 0.1-0.6% Nb, 0.1-0.6% V, 0.1-0.3% N, 0.0005-0.01% B, 0.001-0.02% Sn, equal to or less than 0.03% Al, equal to or less than 0.02% O, 0-0.5% Ti, 0-2% Co, 0-4% Cu, 0-4% Mo, 0-0.02% Ca, 0-0.02% Mg, 0-0.2% REM, and Fe and impurities as the remainder, and the austenitic heat-resistant alloy has a structure having a crystal grain size of equal to or greater than 2.0 to less than 7.0 in terms of grain size number as defined by ASTM E112.
Inventors:
HIRATA HIROYUKI (JP)
SEMBA HIROYUKI (JP)
JOTOKU KANA (JP)
ISEDA ATSURO (JP)
ONO TOSHIHIDE (JP)
TANAKA KATSUKI (JP)
SEMBA HIROYUKI (JP)
JOTOKU KANA (JP)
ISEDA ATSURO (JP)
ONO TOSHIHIDE (JP)
TANAKA KATSUKI (JP)
Application Number:
PCT/JP2016/066458
Publication Date:
January 05, 2017
Filing Date:
June 02, 2016
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C22C38/58
Domestic Patent References:
WO2012176586A1 | 2012-12-27 |
Foreign References:
JP2014047409A | 2014-03-17 | |||
JP2006307313A | 2006-11-09 | |||
JP2004250783A | 2004-09-09 | |||
JPH05195127A | 1993-08-03 |
Other References:
See also references of EP 3318650A4
Attorney, Agent or Firm:
UEBA, Hidetoshi et al. (JP)
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