Sintered body, method of manufacturing sintered body, combustor panel, and method of manufacturing combustor panel

Patent metadata

Field	Value
Publication number	US-11666967-B2
Application number	US-202217968917-A
Country	US
Kind code	B2
Filing date	Oct 19, 2022
Priority date	Apr 5, 2016
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

By melting a shaping material in which a metal powder and a binder are mixed and by carrying out injection molding (primary shaping) in an injection mold, an injection molded body, or an intermediate shaped body are produced. The injection molded body or the intermediate shaped body is placed by a transfer mold and is subjected to a gravity shaping (secondary shaping) with a transformation. A sintered body is manufactured by carrying out debindering and sintering to the injection molded body.

First claim

The invention claimed is:

1. A method of manufacturing a sintered body comprising:
a debindering process of carrying out a debindering to an injection molded body produced by a primary shaping by injecting into an injection mold a shaping material in which a metal powder and a binder are mixed, to produce an intermediate shaped body;
a sintering process of carrying out a sintering to the intermediate shaped body to produce a sintered body; and
a secondary shaping process of transforming the injection molded body or the intermediate shaped body before the sintered body is produced,
wherein the secondary shaping process includes a process of grasping a first part and a second part of the injection molded body or the intermediate shaped body, and rotating the first part and the second part relatively to apply torsion transformation to the injection molded body or the intermediate shaped body.

2. The method of manufacturing the sintered body according to claim 1 , wherein the metal powder is nickel-based alloy, cobalt-based alloy or steel, and
wherein the shaping temperature in the secondary shaping process is a range from 1200 K to 1650 K.

3. The method of manufacturing the sintered body according to claim 1 , wherein the shaping temperature in the secondary shaping process is in a temperature range which causes surface melting of the metal powder.

4. The method of manufacturing the sintered body according to claim 1 , wherein the secondary shaping process is carried out before the debindering process.

Assignees

• Mitsubishi Heavy Ind Aero Engines Ltd

Inventors

• Suzuki Kenji
• TERAUCHI Syuntaro
• Kitagaki Hisashi
• HANAMI Kazuki
• Hanada Tadayuki

Classifications

• B22F3/227

  by organic binder assisted extrusion · CPC title

• B22F3/1021

  Removal of binder or filler (removal of binder from ceramics C04B35/638) · CPC title

• B22F1/10

  Metallic powder containing lubricating or binding agents; Metallic powder containing organic material · CPC title

• F23R3/002

  Wall structures (F23R3/02 and F23R3/007 take precedence) · CPC title

• B22F2005/005

  Article surface comprising protrusions · CPC title