# US 7,608,157 B2 · Heat resistance copper alloy materials

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,608,157 B2
- Document ID: US7608157B2
- Status: Granted
- Kind: B2
- Application number: 10/529,804
- Filed: 2003-09-19
- Published: 2006-11-23
- Granted: 2009-10-27
- Earliest claimed: 2003-03-03
- Assignees: Mitsubishi Shindoh Co., Ltd.
- Inventors: Keiichiro Oishi
- Web page: https://patentgrep.com/patent/US7608157B2

## CPC

- C22C 9/06: with nickel or cobalt as the next major constituent
- B23K 35/302: {Cu as the principal constituent}
- C21D 9/50: for welded joints
- C22C 9/02: with tin as the next major constituent
- C22C 9/04: with zinc as the next major constituent
- C22F 1/08: of copper or alloys based thereon
- F28F 21/085: {from copper or copper alloys}
- B23K 2101/14: Heat exchangers
- B23K 2103/12: Copper or alloys thereof
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- 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
- C21D: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F17/00; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B)
- C22F: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass, C23F17/00)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## Abstract

The present invention discloses a heat resistance copper alloy material characterized in that said copper alloy material comprises 0.15 to 0.33 mass percent of Co, 0.041 to 0.089 mass percent of P, 0.02 to 0.25 mass percent of Sn, 0.01 to 0.40 mass percent of Zn and the remaining mass percent of Cu and inevitable impurities, wherein each content of Co, P, Sn and Zn satisfies the relationships 2.4≦([Co]−0.02)/[P]≦5.2 and 0.20≦[Co]+0.5[P]+0.9[Sn]+0.1[Zn]≦0.54, wherein [Co], [P], [Sn] and [Zn] are said mass percents of Co, P, Sn and Zn content, respectively; and said copper alloy material is a pipe, plate, bar, wire or worked material obtained by working said pipe, plate, bar or wire material into predetermined shapes.

## Claims

### Claim 1

A heat resistance copper alloy material characterized in that said copper alloy material comprises:
0.15 to 0.33 mass percent of Co;
0.041 to 0.089 mass percent of P;
0.02 to 0.25 mass percent of Sn;
0.01 to 0.40 mass percent of Zn; and
the remaining mass percent of Cu and inevitable impurities, wherein each content of Co, P, Sn and Zn satisfies the relationships 2.4≦([Co]−0.02)/[P]≦5.2 and 0.20≦[Co]+0.5[P]+0.9[Sn]+0.1[Zn]≦0.54, wherein [Co], [P], [Sn] and [Zn] are said mass percents of Go, P, Sn and Zn content, respectively; and
said copper alloy material is a pipe, plate, bar, wire or worked material obtained by working said pipe, plate, bar or wire material into predetermined shapes.

### Claim 2 (depends on 1)

The heat resistance copper alloy material according to claim 1, further comprising 0.01 to 0.20 mass percent of Mn or 0.001 to 0.10 mass percent of Mg, Zr or Y, wherein each content of Mn, Mg, Y, Zr and said additive elements satisfies the relationship 0.20≦[Co]+0.5[P]+0.9[Sn]+0.1[Zn]+[Mn]+[Mg]+[Y]+3[Zr]≦0.54 wherein [Mn], [Mg], [Y] and [Zr] are said mass percents of Mn, Mg, Y and Zr content, respectively.

### Claim 3 (depends on 2)

The heat resistance copper alloy material according to claim 2, wherein content of oxygen as said inevitable impurity is less than or equal to 0.0070 mass percent.

### Claim 4 (depends on 2)

The heat resistance copper alloy material according to claim 2, wherein a furnace cooling of said copper alloy material is performed after a brazing treatment or a heat treatment under the same condition as said brazing treatment, and the thermal conductivity is raised by cooling from 670° C. to 480° C. with a cooling rate of 1.5 to 12° C./min in said furnace cooling process.

### Claim 5 (depends on 2)

The heat resistance copper alloy material according to claim 2, wherein said copper alloy material is quenched after a brazing treatment or a heat treatment under the same condition as said brazing treatment, and the thermal conductivity and strength are raised by performing re-heating treatment in which said copper alloy material is heated under conditions with temperature of 480° C. to 670° C. for 3 to 100 minutes after said quenching has been finished.

### Claim 6 (depends on 2)

The heat resistance copper alloy material according to claim 2, wherein said copper alloy material is a pipe, plate, bar, wire or worked material obtained by working said pipe, plate, bar or wire material into predetermined shapes to be brazed.

### Claim 7 (depends on 6)

The heat resistance copper alloy material according to claim 6, wherein said copper alloy material is a seamless copper alloy tube or a welded copper alloy tube to be used as a heat exchanger tube or a piping tube of a heat exchanger.

### Claim 8 (depends on 1)

The heat resistance copper alloy material according to claim 1, wherein content of oxygen as said inevitable impurity is less than or equal to 0.0070 mass percent.

### Claim 9 (depends on 1)

The heat resistance copper alloy material according to claim 1, wherein 0.2% proof stress is higher than or equal to 55 N/mm2 after a brazing treatment or a heat treatment under the same condition as said brazing treatment.

### Claim 10 (depends on 9)

The heat resistance copper alloy material according to claim 9, wherein the brazing treatment comprises treatment of the alloy material at 800° C. for 10 minutes followed by cooling at a rate of 20° C. per minute.

### Claim 11 (depends on 1)

The heat resistance copper alloy material according to claim 1, wherein a furnace cooling of said copper alloy material is performed after a brazing treatment or a heat treatment under the same condition as said brazing treatment, and the thermal conductivity is raised by cooling from 670° C. to 480° C. with a cooling rate of 1.5 to 12° C./min in said furnace cooling process.

### Claim 12 (depends on 1)

The heat resistance copper alloy material according to claim 1, wherein a furnace cooling of said copper alloy material is performed after a brazing treatment or a heat treatment under the same condition as said brazing treatment, and the thermal conductivity is raised by performing re-heating treatment in which said copper alloy material is heated under conditions with temperature of 480° C. to 670° C. for 3 to 100 minutes before or after said furnace cooling process has been finished.

### Claim 13 (depends on 1)

The heat resistance copper alloy material according to claim 1, wherein said copper alloy material is quenched after a brazing treatment or a heat treatment under the same condition as said brazing treatment, and the thermal conductivity and strength are raised by performing re-heating treatment in which said copper alloy material is heated under conditions with temperature of 480° C. to 670° C. for 3 to 100 minutes after said quenching has been finished.

### Claim 14 (depends on 1)

The heat resistance copper alloy material according to claim 1, wherein said copper alloy material is a pipe, plate, bar, wire or worked material obtained by working said pipe, plate, bar or wire material into predetermined shapes to be brazed.

### Claim 15 (depends on 14)

The heat resistance copper alloy material according to claim 14, wherein said copper alloy material is a seamless copper alloy tube or a welded copper alloy tube to be used as a heat exchanger tube or a piping tube of a heat exchanger.

### Claim 16 (depends on 14)

The heat resistance copper alloy material according to claim 14, wherein said copper alloy material is a seamless copper alloy tube or a welded copper tube composing a heat exchanger tube or a piping tube of a heat exchanger using a heat medium gas aside from HCFC system fluorocarbon.

### Claim 17 (depends on 14)

The heat resistance copper alloy material according to claim 14, wherein said copper alloy material is a plate part in a heat exchanger or a plate used as a component of connecting plate which couples said plate part with said heat exchanger tube or other plate parts.

### Claim 18 (depends on 1)

The heat resistance copper alloy material according to claim 1, wherein thermal conductivity of the heat resistance copper alloy material is higher than 0.57 cal/cm·sec·° C.