# US 10,478,925 B2 · Brazing filler material and brazing sheet

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- Number: US 10,478,925 B2
- Document ID: US10478925B2
- Status: Granted
- Kind: B2
- Application number: 15/554,044
- Filed: 2016-02-23
- Published: 2018-01-25
- Granted: 2019-11-19
- Earliest claimed: 2015-03-20
- Assignees: Kobe Steel, Ltd.
- Applicants: Kobe Steel, Ltd.
- Inventors: Takahiro Izumi; Kenichiro Yoshida; Akihiro Tsuruno
- Web page: https://patentgrep.com/patent/US10478925B2

## CPC

- B23K 35/282: {Zn as the principal constituent}
- B23K 35/22: characterised by the composition or nature of the material
- B23K 35/28: with the principal constituent melting at less than 950°C
- C22C 21/00: Alloys based on aluminium
- C22C 21/10: with zinc as the next major constituent
- F28F 21/08: of metal
- F28F 21/084: {from aluminium or aluminium alloys}
- 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
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## Abstract

The present invention provides a brazing filler material in which the formation of coarse Si particles is suppressed, and a brazing sheet using the same. The brazing filler material includes Si: 3.5% by mass or more and 13.0% by mass or less, Ti: 0.001% by mass or more and 0.05% by mass or less, V: more than 0.0005% by mass and 0.05% by mass or less, and B: 0.001% by mass or less (excluding 0% by mass), with the balance being Al and inevitable impurities, and the value of V/Ti, which is a value obtained by dividing the V content (% by mass) by the Ti content (% by mass) is 0.05 or more and 5 or less.

## Claims

### Claim 1

A brazing filler material, consisting of:
Si: 3.5% by mass or more and 13.0% by mass or less,
Ti: 0.001% by mass or more and 0.05% by mass or less,
V: more than 0.0005% by mass and 0.05% by mass or less,
Fe: 0.15% by mass or more and 1.2% by mass or less,
Cu: less than 0.05% by mass,
B: 0.001% by mass or less, excluding 0% by mass,
with the balance being Al and inevitable impurities,
wherein a value of V/Ti, which is a value obtained by dividing a V content (% by mass) by a Ti content (% by mass), is 0.05 or more and 5 or less.

### Claim 2

A brazing filler material, consisting of:
Si: 3.5% by mass or more and 13.0% by mass or less,
Ti: 0.001% by mass or more and 0.05% by mass or less,
V: more than 0.0005% by mass and 0.05% by mass or less,
Fe: 0.15% by mass or more and 1.2% by mass or less,
Cu: less than 0.05% by mass,
B: 0.001% by mass or less, excluding 0% by mass,
one or more element selected from the group consisting of Zn: 0.01% by mass or more and 6.0% by mass or less, and Mn: 0.01% by mass or more and 1.2% by mass or less,
with the balance being Al and inevitable imprities,
wherein a value of V/Ti, which is a value obtained by dividing a V content (% by mass) by a Ti content (% by mass), is 0.05 or more and 5 or less.

### Claim 3 (depends on 1)

A brazing sheet, wherein the brazing filler material according to claim 1 is cladded on at least one side of a core material.

### Claim 4 (depends on 2)

A brazing sheet, wherein the brazing filler material according to claim 2 is cladded on at least one side of a core material.

### Claim 5

A brazing filler material, consisting of:
Si: 3.5% by mass or more and 13.0% by mass or less,
Ti: 0.001% by mass or more and 0.05% by mass or less,
V: more than 0.0005% by mass and 0.05% by mass or less,
Fe: 0.15% by mass or more and 1.2% by mass or less,
Cu: less than 0.05% by mass,
B: 0.001% by mass or less, excluding 0% by mass, and
one or more element selected from the group consisting of Zn: 0.01% by mass or more and 6.0% by mass or less, Mn: 0.01% by mass or more and 1.2% by mass or less, Na: 0.0001% by mass or more and 0.01% by mass or less, and Sr: 0.001% by mass or more and 0.05% by mass or less,
with the balance being Al and inevitable impurities,
wherein a value of V/Ti, which is a value obtained by dividing a V content (% by mass) by a Ti content (% by mass), is 0.05 or more and 5 or less.

### Claim 6 (depends on 5)

A brazing sheet, wherein the brazing filler material according to claim 5 is cladded on at least one side of a core material.