Cr-BASED TWO-PHASE ALLOY AND PRODUCT USING SAID TWO-PHASE ALLOY

WIPO Patent Application WO/2017/037851

A1

The purpose of the present invention is to provide a low-cost Cr-based two-phase alloy which is a metal material suitable for applications in a highly corrosive environment and in a temperature range of oil wells or the like, and which has high corrosion resistance and good mechanical characteristics equivalent to or higher than those of conventional metal materials for such applications. A Cr-based two-phase alloy according to the present invention has an austenite phase and a ferrite phase, and is characterized in that: the chemical composition of the Cr-based two-phase alloy contains from 34% by mass to 70% by mass (inclusive) of Cr, from 17% by mass to 45% by mass (inclusive) of Ni, from 10% by mass to 35% by mass (inclusive) of Fe, from 0.1% by mass to 2% by mass (inclusive) of Mn, from 0.1% by mass to 3% by mass (inclusive) of Mo, from 0.1% by mass to 1% by mass (inclusive) of Si and impurities; and the total content of Ni and Fe is from 30% by mass to 65% by mass (inclusive).

KIMURA TOMONORI (JP)
NOUJIMA MASAFUMI (JP)
AONO YASUHISA (JP)
YAMAUCHI HIROSHI (JP)

PCT/JP2015/074786

March 09, 2017

August 31, 2015

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HITACHI LTD (JP)

C22C27/06; C22C30/00; C22F1/11; C22F1/00

JPH08127848A	1996-05-21
JPH07331390A	1995-12-19
JPH07216511A	1995-08-15
JPH0770681A	1995-03-14
JPH03264641A	1991-11-25
JPS589922A	1983-01-20
JPS586927A	1983-01-14
JPS57207149A	1982-12-18
JPS57203738A	1982-12-14
JPS5554553A	1980-04-21
JPS50133114A	1975-10-22

POLAIRE I.P.C. (JP)

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