Brazing sheet and manufacturing method thereof
US11780034B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 27, 2019 |
| Grant date | Oct 10, 2023 |
| Priority date | — |
| Expiry date | Nov 19, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F2275/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A brazing sheet (1) includes a core material (11) composed of an Al alloy that contains 0.20-3.0 mass % of Mg; and a filler material (12) layered on the core material and composed of an Al alloy that contains Mg, 6.0-13.0 mass % of Si, and more than 0.050 mass % and 1.0 mass % or less of Bi. The Mg concentration of the filler material becomes continuously lower in a direction from a boundary (122) with the core material to an outermost surface (121). The Mg concentration of the filler material is 0.150 mass % or less at a first depth from the outermost surface that is ⅛ of a thickness (tf) of the filler material and is 5-90% of the amount of Mg in the core material at a second depth from the outermost surface that is ⅞ of the thickness of the filler material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.