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COBALT-BASE ALLOY WITH HIGH HEAT RESISTANCE AND HIGH STRENGTH AND PROCESS FOR PRODUCING THE SAME

Foreign code F110003668
File No. A281-06WO
Posted date Jul 1, 2011
Country EPO
Application number 06797765
Gazette No. 1925683
Gazette No. 1925683
Date of filing Sep 5, 2006
Gazette Date May 28, 2008
Gazette Date Nov 6, 2013
International application number WO2006JP317939
Date of international filing Sep 5, 2006
Priority data
  • P2005-267964 (Sep 15, 2005) JP
Title COBALT-BASE ALLOY WITH HIGH HEAT RESISTANCE AND HIGH STRENGTH AND PROCESS FOR PRODUCING THE SAME
Abstract

A Co-base alloy which has a basic composition including, in terms of mass proportion, 0.1% - 10% Al, 3.0 - 45% W, and Co as the remainder and has an intermetallic compound of the Ll 2 type [Co 3 (Al,W)] dispersed and precipitated therein. Part of the Co may be replaced with Ni, Ir, Fe, Cr, Re, or Ru, while part of the Al and W may be replaced with Ni, Ti, Nb, Zr, V, Ta or Hf. The intermetallic compound [Co 3 (Al, W)] has a high melting point, and this compound and the matrix are mismatched little with respect to lattice constant. Thus, the cobalt-base alloy can have high-temperature strength equal to that of nickel-base alloys and excellent structure stability.

  • Applicant
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • Inventor
  • ISHIDA, KIYOHITO
  • KAINUMA, RYOSUKE
  • OIKAWA, KATUNARI
  • OHNUMA, IKUO
  • SATO, JUN
IPC(International Patent Classification)
Reference ( R and D project ) CREST The Innovation of Simulation Technology and the Construction of Foundations for Its Practical Use AREA
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