Title:
オーステナイト系耐熱合金ならびにこの合金からなる耐熱耐圧部材とその製造方法
Document Type and Number:
Japanese Patent JP4431905
Kind Code:
B2
Abstract:
An austenitic heat resistant alloy, which comprises by mass percent, C: over 0.02 to 0.15%, Si ‰¤ 2%, Mn ‰¤ 3%, P‰¤ 0.03%, S ‰¤ 0.01%, Cr: 28 to 38%, Ni: over 40 to 60%, Co ‰¤ 20% (including 0%), W over 3 to 15%, Ti: 0.05 to 1.0%, Zr: 0.005 to 0.2%, Al: 0.01 to 0.3%, N ‰¤ 0.02%, and Mo < 0.5%, with the balance being Fe and impurities, in which the following formulas (1) to (3) are satisfied has high creep rupture strength and high toughness after a long period of use at a high temperature, and further it is excellent in hot workability. This austenitic heat resistant alloy may contain a specific amount of one or more elements selected from Nb, V, Hf, B, Mg, Ca, Y, La, Ce, Nd, Sc, Ta, Re, Ir, Pd, Pt and Ag. P ‰¤ 3/{200(Ti + 8.5 × Zr)}... (1), 1.35 × Cr ‰¤ Ni + Co ‰¤ 1.85 × Cr ... (2), Al ‰¥ 1.5 × Zr ... (3).
Inventors:
Junyuki Senba
Koichi Okada
Masaaki Igarashi
Koichi Okada
Masaaki Igarashi
Application Number:
JP2009524838A
Publication Date:
March 17, 2010
Filing Date:
June 15, 2009
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
C22C19/05; C22F1/00; C22F1/10
Domestic Patent References:
| JP2004003000A | 2004-01-08 | |||
| JP2005048284A | 2005-02-24 | |||
| JPH07216511A | 1995-08-15 | |||
| JPH08127848A | 1996-05-21 | |||
| JPH07331390A | 1995-12-19 |
Attorney, Agent or Firm:
Mikiji Sugioka
Terutada Hogami
Chihara
Terutada Hogami
Chihara