# US 2010/0167083 A1 · Composite material and producing mehtod thereof

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- Number: US 2010/0167083 A1
- Document ID: US20100167083A1
- Status: Published application
- Kind: A1
- Application number: 12/645,779
- Filed: 2009-12-23
- Published: 2010-07-01
- Earliest claimed: 2008-12-26
- Assignees: Hitachi, Ltd.
- Inventors: Seunghwan Park; Satoshi Hirano; Kazutaka Okamoto
- Web page: https://patentgrep.com/patent/US20100167083A1

## CPC

- B23K 20/1265: {Non-butt welded joints, e.g. overlap-joints, T-joints or spot welds}
- B23K 20/1225: {Particular aspects of welding with a non-consumable tool}
- B23K 20/128: {making use of additional material}
- Y10T 428/12493: Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An object of the present invention is to provide a method for producing a composite material that can prevent a powdered additive to be mixed from scattering and control a quantity of the additive dispersed in the composite material. A method for producing a composite material in which an additional material different from a base material is dispersed into a part of the base material comprises the steps of providing a wire rod formed by applying a metallic film to the additional material to be dispersed or by stuffing a metallic tube with the additional material to be dispersed, fixing the wire rod on a surface or into an inside of the base material, and applying stirring along the fixed wire rod with a tool for friction stirring to disperse the additional material into the part of the base material.

## Claims

### Claim 1

A method for producing a composite material in which an additional material different from a base material is dispersed into a part of the base material, comprising the steps of:
providing a wire rod formed by applying a metallic film to the additional material to be dispersed or by stuffing a metallic tube with the additional material to be dispersed;
fixing the wire rod on a surface or into an inside of the base material; and
applying stirring along the fixed wire rod with a tool for friction stirring to disperse the additional material into the part of the base material.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the wire rod is fixed into a groove formed on the base material.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the groove is formed at a protrusion formed on the base material.

### Claim 4 (depends on 3)

method according to claim 3, wherein the protrusion is cut off after the stirring.

### Claim 5 (depends on 2)

The method according to claim 2, wherein the wire rod is stuck into the groove by pressure imposing unit for imposing pressure on the wire rod.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the tool for friction stirring has a pin-shaped probe protruding on an end surface of the tool.

### Claim 7 (depends on 6)

The method according to claim 6, wherein a diameter of the pin-shaped probe is larger than an outer dimension of the wire rod.

### Claim 8 (depends on 1)

method according to claim 1, wherein the additional material to be dispersed is powder.

### Claim 9 (depends on 1)

The method according to claim 1, wherein the additional material to be dispersed contains a component for generating a gas.

### Claim 10 (depends on 9)

The method according to claim 9, wherein the component has a decomposition temperature lower than temperature of the base material in the stirring of the wire rod.

### Claim 11 (depends on 10)

The method according to claim 10, further comprising the step of heating the composite material to generate bubbles after the stirring of the wire rod.

### Claim 12 (depends on 1)

The method according to claim 1, wherein the wire rod is interposed between pluralities of the base materials.

### Claim 13 (depends on 1)

The method according to claim 1, wherein the wire rod is inserted into a through-hole formed in the base material.

### Claim 14 (depends on 1)

A composite material produced by the method according to claim 1.

### Claim 15 (depends on 14)

The composite material according to claim 14, containing an intermetallic compound in a stirred region.

### Claim 16

An apparatus for producing a composite material, comprising:
a pressure imposing unit for sticking a wire rod to a base material; and
a stirring unit for stirring the wire rod stuck by the pressure imposing unit and the base material.

### Claim 17 (depends on 16)

The apparatus according to claim 16, further comprising a heating unit for heat-treating a region where the base material and the wire rod are stirred by the stirring unit.

### Claim 18 (depends on 16)

The apparatus according to claim 16, comprising a cutting unit for cutting off a part of the region.