Composite member

Patent metadata

Field	Value
Publication number	US-12134127-B2
Application number	US-202318533431-A
Country	US
Kind code	B2
Filing date	Dec 8, 2023
Priority date	Mar 31, 2020
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

The present invention provides an alloy, an alloy powder, an alloy member, and a composite member which are excellent in corrosion resistance and wear resistance, have crack resistance, and are suitable for an additive manufacturing method and the like. An alloy and an alloy powder include, by mass %, Cr: 18 to 22%, Mo: 18 to 28%, Ta: 1.5 to 57%, C: 1.0 to 2.5%, Nb: 0 to 42%, Ti: 0 to 15%, V: 0 to 27%, Zr: 0 to 29%, and a remainder consisting of Ni and unavoidable impurities, where a molar ratio of (Ta+0.7Nb+Ti+0.6V+Zr)/C=0.5 to 1.5 is satisfied. An alloy member is an additively manufactured product or a cast having such a solidification structure, and the solidification structure is a dendrite-like crystal structure having a metal phase having a face-centered cubic structure and carbides.

First claim

The invention claimed is:

1. A composite member comprising:
a base material; and
an alloy layer laminated on a surface of the base material, wherein
the alloy layer which is a laminated model having a solidification structure, includes, by mass %,
Cr: 18 to 22%,
Mo: 18 to 28%,
Ta: 1.5 to 57%,
C: 1.0 to 2.5%
Nb: 0 to 42%,
Ti: 0 to 15%,
V: 0 to 27%,
Zr: 0 to 29%, and
a remainder consisting of Ni and unavoidable impurities, where a molar ratio of (Ta+0.7Nb+Ti+0.6V+Zr)/C=0.5 to 1.5 is satisfied, and wherein

the solidification structure is a dendrite crystal structure having a metal phase having a face-centered cubic structure and carbides including a carbide phase mainly containing any element of Ta, Nb, Ti, V, and Zr.

2. The composite member according to claim 1 , which is a screw for injection molding or a cylinder for injection molding.

Assignees

• Proterial Ltd

Inventors

• Shiratori Hiroshi
• Shinagawa Kazuya
• Kuwabara Kousuke
• Koseki Shuho

Classifications

• C22C19/056

  with the maximum Cr content being at least 10% but less than 20% · CPC title

• C22C19/055

  with the maximum Cr content being at least 20% but less than 30% · CPC title

• B22F2999/00

  Aspects linked to processes or compositions used in powder metallurgy · CPC title

• B22F2304/10

  Micron size particles, i.e. above 1 micrometer up to 500 micrometer · CPC title

• B22F2303/01

  Main component · CPC title