Title:
PROCESS FOR MANUFACTURING NI-BASE ALLOY AND NI-BASE ALLOY
Document Type and Number:
WIPO Patent Application WO/2010/038680
Kind Code:
A1
Abstract:
Provided is an Ni-base alloy excellent in strength, ductility and other properties through the resolution of micro-segregation. Also provided is a process for manufacturing an Ni-base alloy containing by mass C: 0.15% or less, Si: 1% or less, Mn: 1% or less, Cr: 10 to 24%, Mo+(1/2)×W (where Mo may be contained either alone or as an essential component): 5 to 17%, Al: 0.5 to 1.8%, Ti: 1 to 2.5%, Mg: 0.02% or less, and either B: 0.02% or less and/or Zr: 0.2% or less at an Al/(Al+0.56Ti) ratio of 0.45 to 0.70 with the balance consisting of Ni and impurities, which comprises subjecting, at least one time, an Ni-base alloy raw material which is prepared by vacuum melting and has the above composition to homogenization heat treatment at 1160 to 1220°C for 1 to 100 hours. The Mo segregation ratio of the alloy is controlled to 1 to 1.17 by the homogenization heat treatment.
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Inventors:
AOKI Chuya (HITACHI METALSLTD.,2107-2,Yasugi-cho,Yasugi-sh, Shimane 01, 〒6928601, JP)
青木 宙也 (〒01 島根県安来市安来町２１０７番地２ 日立金属株式会社 冶金研究所内 Shimane, 〒6928601, JP)
UEHARA Toshihiro (HITACHI METALSLTD.,2107-2,Yasugi-cho,Yasugi-sh, Shimane 01, 〒6928601, JP)
青木 宙也 (〒01 島根県安来市安来町２１０７番地２ 日立金属株式会社 冶金研究所内 Shimane, 〒6928601, JP)
UEHARA Toshihiro (HITACHI METALSLTD.,2107-2,Yasugi-cho,Yasugi-sh, Shimane 01, 〒6928601, JP)
Application Number:
JP2009/066703
Publication Date:
April 08, 2010
Filing Date:
September 25, 2009
Export Citation:
Assignee:
HITACHI METALS,LTD. (2-1Shibaura 1-chome, Minato-ku Tokyo, 14, 〒1058614, JP)
日立金属株式会社 (〒14 東京都港区芝浦一丁目２番１号 Tokyo, 〒1058614, JP)
AOKI Chuya (HITACHI METALSLTD.,2107-2,Yasugi-cho,Yasugi-sh, Shimane 01, 〒6928601, JP)
青木 宙也 (〒01 島根県安来市安来町２１０７番地２ 日立金属株式会社 冶金研究所内 Shimane, 〒6928601, JP)
日立金属株式会社 (〒14 東京都港区芝浦一丁目２番１号 Tokyo, 〒1058614, JP)
AOKI Chuya (HITACHI METALSLTD.,2107-2,Yasugi-cho,Yasugi-sh, Shimane 01, 〒6928601, JP)
青木 宙也 (〒01 島根県安来市安来町２１０７番地２ 日立金属株式会社 冶金研究所内 Shimane, 〒6928601, JP)
International Classes:
C22F1/10; C22B9/18; C22B9/187; C22B9/20; C22C19/05; C22F1/02; C22F1/00
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