ALLOY, ALLOY POWDER, ALLOY MEMBER, AND COMPOSITE MEMBER

Title:

ALLOY, ALLOY POWDER, ALLOY MEMBER, AND COMPOSITE MEMBER

Document Type and Number:

WIPO Patent Application WO/2021/201118

Kind Code:

A1

Abstract:

The present invention provides an alloy, alloy powder, an alloy member, and a composite member which are excellent in corrosion resistance and abrasion resistance, have crack resistance, and are suitable for an additive fabrication method and the like. The alloy and the alloy powder: contain, by mass%, Cr: 18-22%, Mo: 18-28%, Ta: 1.5-57%, and C: 1.0-2.5%; comprise Nb: 0-42%, Ti: 0-15%, V: 0-27%, Zr: 0-29%, and the balance Ni and inevitable impurities; and satisfy (Ta + 0.7 Nb + Ti + 0.6 V + Zr)/C = 0.5-1.5 in terms of molar ratio. The alloy member is an additively fabricated body or a casting having such a solidification structure, said solidification structure having carbide and a metallic phase having a face-centered cubic lattice structure, and forming a dendrite crystalline structure. The composite member has a substrate and an alloy layer formed on a surface of the substrate, wherein the alloy layer is an additively fabricated body having this kind of solidification structure, said solidification structure having carbide and the metallic phase having the face-centered cubic lattice structure, and forming the dendrite crystalline structure.

Inventors:

SHIRATORI HIROSHI (JP)
SHINAGAWA KAZUYA (JP)
KUWABARA KOUSUKE (JP)
KOSEKI SHUHO (JP)

Application Number:

PCT/JP2021/013889

Publication Date:

October 07, 2021

Filing Date:

March 31, 2021

Export Citation:

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Assignee:

HITACHI METALS LTD (JP)

International Classes:

B22F1/00; B22F3/105; B22F3/16; B22F7/04; B33Y70/00; B33Y80/00; C22C1/04; C22C19/05; C22C27/02; C22C30/00; C22C30/02

Domestic Patent References:

WO2019049594A1

2019-03-14

Foreign References:

JP2016216762A	2016-12-22
JPH07316696A	1995-12-05
JP2015160965A	2015-09-07
JP2014221940A	2014-11-27
JPH05156396A	1993-06-22

Other References: