# US 10,478,919 B2 · Method for producing aluminum joined body

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- Number: US 10,478,919 B2
- Document ID: US10478919B2
- Status: Granted
- Kind: B2
- Application number: 15/674,677
- Filed: 2017-08-11
- Published: 2018-03-15
- Granted: 2019-11-19
- Earliest claimed: 2016-09-13
- Assignees: Kobe Steel, Ltd.
- Applicants: Kobe Steel, Ltd.
- Inventors: Takuro Aoki; Tsuyoshi Matsumoto
- Web page: https://patentgrep.com/patent/US10478919B2

## CPC

- B23K 26/32: taking account of the properties of the material involved
- B23K 26/242: Fillet welding, i.e. involving a weld of substantially triangular cross section joining two parts
- B23K 26/26: of rectilinear seams
- B23K 35/286: {Al as the principal constituent}
- B23K 2101/006: {Vehicles}
- B23K 2103/10: Aluminium or alloys thereof
- 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

## Abstract

A method for producing an aluminum joined body includes a step of forming a flare joint by using a first aluminum member and a second aluminum member; and a step of performing laser welding by irradiating a groove of the flare joint with a laser beam having a beam diameter of 0.8 to 3.5 mm while feeding a filler material to the groove, the filler material being made of an aluminum alloy containing, in percent by mass, 1.0% to 3.0% of Mg, 0.50% to 1.0% of Mn, 0.05% to 0.20% of Cr, and 0.05% to 0.20% of Ti, with the balance being aluminum and incidental impurities.

## Claims

### Claim 1

A method for producing an aluminum joined body comprising:
a step of forming a flare joint by using a first aluminum member and a second aluminum member; and
a step of performing laser welding by irradiating a groove of the flare joint between the first aluminum member and the second aluminum member with a laser beam having a beam diameter of 0.8 to 3.5 mm while feeding a filler material to the groove, the filler material being made of an aluminum alloy containing, in percent by mass, 1.0% to 3.0% of Mg, 0.50% to 1.0% of Mn, 0.05% to 0.20% of Cr, and 0.05% to 0.20% of Ti, with the balance being aluminum and incidental impurities.

### Claim 2 (depends on 1)

The method for producing an aluminum joined body according to claim 1, wherein the laser beam has a beam diameter of 2.0 to 3.0 mm.