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Title:
NI-BASED SUPER HEAT-RESISTANT ALLOY AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2018/155446
Kind Code:
A1
Abstract:
This Ni-based super heat-resistant alloy has a component composition in which the equilibrium precipitated amount of a gamma prime phase at 700°C is 35 mol% or greater, and has crystal grains having a maximum diameter of 75 nm or less in the cross-sectional structure thereof. Also provided is a method for manufacturing this Ni-based super heat-resistant alloy. This method includes a preparation step for preparing a raw material of a Ni-based super heat-resistant alloy having a component composition in which the equilibrium precipitated amount of a gamma prime phase at 700°C is 35 mol% or greater, and a processing step for performing plastic processing of the raw material a plurality of times at a temperature of 500°C or less so as to obtain a cumulative processing rate of 30% or greater. Furthermore provided is a method for manufacturing a Ni-based super heat-resistant alloy, comprising preparing an alloy material having the abovementioned component composition, a hardness of 500 HV or greater, and crystal grains having a maximum diameter of 75 nm or less in the cross-sectional structure thereof, performing plastic processing of the alloy material at a temperature of 500°C or less, and obtaining an alloy having a hardness of 500 HV or greater.

Inventors:
HAN GANG (JP)
FUNAKOSHI YASUHIRO (JP)
MUHAMAD AINUL ARAFAH BINTI (JP)
Application Number:
PCT/JP2018/006046
Publication Date:
August 30, 2018
Filing Date:
February 20, 2018
Export Citation:
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Assignee:
HITACHI METALS LTD (JP)
International Classes:
C22C19/05; C22F1/10; C22F1/00
Domestic Patent References:
WO2009028671A12009-03-05
WO2016158705A12016-10-06
WO2016129485A12016-08-18
WO2016129485A12016-08-18
Foreign References:
JP2013057122A2013-03-28
US20020041821A12002-04-11
JP2009097094A2009-05-07
JP2013177668A2013-09-09
JP2008075171A2008-04-03
JP2008179845A2008-08-07
JP2009013450A2009-01-22
JP2008144202A2008-06-26
JP2017179592A2017-10-05
US4777710A1988-10-18
Other References:
See also references of EP 3587606A4
Attorney, Agent or Firm:
ASAMURA PATENT OFFICE, P.C. (JP)
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