HIGH-STRENGTH LOW-THERMAL-EXPANSION CASTING ALLOY FOR HIGH TEMPERATURE, METHOD FOR MANUFACTURING SAME, AND CASTING FOR TURBINE

Title:

HIGH-STRENGTH LOW-THERMAL-EXPANSION CASTING ALLOY FOR HIGH TEMPERATURE, METHOD FOR MANUFACTURING SAME, AND CASTING FOR TURBINE

Document Type and Number:

WIPO Patent Application WO/2017/006659

Kind Code:

A1

Abstract:

The present invention contains, in terms of % by mass, 0.02-0.06% C, 0.2-0.6% Si, 0.3-1.5% Mn, 24.0-29.5% Ni, and 17.5-25.5% Co, the Ni equivalent being in the range of 40.5-44.5%, the value of A represented by formula (I) being in the range of 27.5-29.5, and the remainder comprising Fe and unavoidable impurities, and the surface area of a martensitic phase in the microstructure being 30-90%. Formula (I): A = 30[C] – 1.5 × [Si] + 0.5 × ([Mn] – 55 × [S]/32) + [Ni] + 0.05 × [Co] + 0.1

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Inventors:

HANDA TAKUO (JP)
RYU SHIMIN (JP)
KURUSU NAOTOSHI (JP)
NIINUMA TORU (JP)
TAKEDA SHINICHI (JP)
SANYOSHI MASAHIRO (JP)

Application Number:

PCT/JP2016/066220

Publication Date:

January 12, 2017

Filing Date:

June 01, 2016

Export Citation:

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Assignee:

NIPPON CHUZO K K (JP)

International Classes:

C22C38/00; C21D6/00; C22C38/10; C22C38/60

Foreign References:

JPH04218642A	1992-08-10
JP2003286546A	2003-10-10
JPH11279708A	1999-10-12
US20030118468A1	2003-06-26
JP2016117924A	2016-06-30

Attorney, Agent or Firm:

TAKAYAMA Hiroshi (JP)

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