Alloying-element additive and method of manufacturing copper alloy

Patent metadata

Field	Value
Publication number	US-2016298212-A1
Application number	US-201615010780-A
Country	US
Kind code	A1
Filing date	Jan 29, 2016
Priority date	Apr 13, 2015
Publication date	Oct 13, 2016
Grant date	—

Abstract

An alloying-element additive for adding an alloy element to a copper melt formed by melting a base material including a copper in manufacturing a copper alloy. The alloying-element additive includes a wire-shaped or plate-shaped core including an alloy element, and an outer layer material including a copper and covering the core. A weight ratio of the copper in the outer layer material and the alloy element in the core is in a range of weight ratio where the alloying-element additive has a liquid phase in a temperature range of not more than a melting point of the copper in a copper-alloy element phase diagram.

First claim

What is claimed is:

1 . An alloying-element additive for adding an alloy element to a copper melt formed by melting a base material including a copper in manufacturing a copper alloy, the alloying-element additive comprising:
a wire-shaped or plate-shaped core including an alloy element; and an outer layer material including a copper and covering the core, wherein a weight ratio of the copper in the outer layer material and the alloy element in the core is in a range of weight ratio where the alloying-element additive has a liquid phase in a temperature range of not more than a melting point of the copper in a copper-alloy element phase diagram

2 . The alloying-element additive according to claim 1 , wherein the outer layer material is provided on the core such that no intermetallic compound comprising the copper in the outer layer material and the alloy element in the core is formed therebetween.

3 . The alloying-element additive according to claim 1 , wherein the core is wire-shaped, and
wherein the outer layer material comprises a composite wire provided to cover the whole circumference of the wire-shaped core.

4 . The alloying-element additive according to claim 1 , wherein the core is plate-shaped, and
wherein the outer layer material comprises a clad plate provided to cover both main surfaces of the plate-shaped core.

5 . The alloying-element additive according to claim 1 , wherein the alloy element comprises at least one of Mg, Al, Ti, Be, Zr, Ce, Mn, Si and Y.

6 . A method of manufacturing a copper alloy including an alloy element, the method comprising:
providing a strip material including a copper and a wire rod including an alloy element; forming a composite wire material having the wire rod wrapped with the strip material, the composite wire material being formed by placing the wire rod on the strip material along a longitudinal direction, rolling up the strip material in a width direction so as to wrap the wire rod while conveying the strip material and the wire rod in the longitudinal direction, and joining the rolled strip material at a seam, drawing the composite wire material to form an alloying-element additive that comprises a wire-shaped core including an alloy element and an outer layer material including a copper and covering the core, wherein a weight ratio of the copper in the outer layer material to the alloy element in the core is in a range of weight ratio where the alloying-element additive has a liquid phase in a temperature range of not more than a melting point of copper in a copper-alloy element phase diagram; melting a base material including a copper to form a copper melt concurrently with the providing, the forming and the drawing; and adding the alloying-element additive to the copper melt.

7 . The method according to claim 6 , wherein during the drawing, the composite wire material is drawn at an area reduction rate in a range of not less than 20% and not more than 99.99%.

Assignees

• Hitachi Metals Ltd

Inventors

• Fujito Keisuke
• Hayasaka Takashi
• Usami Takeshi
• Sumi Toru

Classifications

• C22C1/02 Primary

  by melting {(C22C1/1036 takes precedence)} · CPC title

• B21C37/042

  Manufacture of coated wire or rods · CPC title

• C22C1/06 Primary

  with the use of special agents for refining or deoxidising · CPC title

• B21C1/02

  Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums · CPC title

• C22C9/00

  Alloys based on copper · CPC title