Method of manufacturing billet for plastic working for producing composite member, and billet manufactured thereby

Patent metadata

Field	Value
Publication number	US-11633783-B2
Application number	US-201916427909-A
Country	US
Kind code	B2
Filing date	May 31, 2019
Priority date	Apr 15, 2019
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

Disclosed are a method of manufacturing a billet used in plastic working for producing a composite member and a billet manufactured by the method. The method includes (A) ball-milling powders of two more materials to prepare a composite powder and (B) preparing a multi-layered billet containing the composite powder. The multi-layered billet includes a core layer and two or more shell layers. The shell layers except for the outermost shell layer are made of the composite powder. The outermost shell layer is made of a pure metal or metal alloy. The composite powders contained in the core layer and each of the shell layers have different compositions. The method has an advantage of manufacturing a plastic working billet being capable of overcoming the limitation of a single-material billet and enabling production of a characteristic-specific composite member such as a clad member.

First claim

What is claimed is:

1. A method of manufacturing a billet for plastic working for producing a composite member, the method comprising:
(A) ball-milling aluminum powder and carbon nanotubes (CNT) to produce a plurality of composite powders; and
(B) preparing a multi-layered billet using the plurality of composite powders,
wherein in the step (B), the preparing of the multi-layered billet comprises subjecting the composite powder to spark plasma sintering performed at a pressure of 30 to 100 MPa and a temperature of 280° C. to 600° C. for a duration of 1 second to 30 minutes,
wherein the multi-layered billet comprises a first billet having a can shape and serving as a second shell layer; a second billet disposed inside the first billet as a first shell layer; and a third billet disposed inside the second billet as a core layer,
wherein the first billet is made of aluminum, and the second billet comprises one of the plurality of composite powders and the third billet comprise another one of the plurality of the composite powders, and
wherein the second billet comprises 0.09 to 10 parts by volume of the carbon nanotubes with respect to 100 parts by volume of the aluminum powder, and the third billet comprises 0.08 part by volume of the carbon nanotubes with respect to 100 parts by volume of the aluminum powder.

2. A multi-layered billet used in plastic working for producing a composite member, the multi-layered billet comprising a first billet having a can shape and serving as a second shell layer; a second billet disposed inside the first billet as a first shell layer; and a third billet disposed inside the second billet as a core layer,
wherein the first billet is made of aluminum, the second billet comprises 0.09 to 10 parts by volume of carbon nanotubes with respect to 100 parts by volume of an aluminum powder, and the third billet comprises 0.08 part by volume of carbon nanotubes with respect to 100 parts by volume of the aluminum powder,
wherein the multi-layered billet is manufactured by the method of claim 1 .

Assignees

• Nat Univ Pukyong Ind Univ Coop Found

Inventors

• Kwon Hansang

Classifications

• B22F3/105

  by using electric current {other than for infrared radiant energy}, laser radiation or plasma (B22F3/11 takes precedence){; by ultrasonic bonding (B22F3/115 takes precedence)} · CPC title

• B22F7/06 Primary

  of composite workpieces or articles from parts, e.g. to form tipped tools {(B22F7/002 takes precedence)} · CPC title

• B22F3/20

  by extruding · CPC title

• B22F2003/1051

  by electric discharge · CPC title

• B22F7/008

  characterised by the composition · CPC title