Granted Patent B2

US 12,359,286 · App. 18/025,473 · Granted Jul 15, 2025

Inventors: Dai Yamamoto (Aichi, JP); Phumprasop Kanokploy (Aichi, JP); Makoto Ando (Aichi, JP)

Assignee: UACJ Corporation

C22C21/02B23K1/00B23K1/0012B23K1/19B23K1/20B23K35/0233B23K35/286B23K35/288C22F1/043C22F1/053B23K35/38B23K2101/14B23K2103/10C22C21/10

Abstract

Claims (42)

1. A brazing, monolayer, aluminum-alloy material having:

a chemical composition composed of Si: 1.5 mass % or more and 3.5 mass % or less, Fe: 0.05 mass % or more and 2.00 mass % or less, Mn: 0.1 mass % or more and 2.0 mass % or less, Mg: 0.005 mass % or more and 0.500 mass % or less, and Bi: 0.010 mass % or more and 0.500 mass % or less, the remainder being Al and unavoidable impurities; and

a metallographic structure in which Mg—Bi-series compounds are dispersed in an Al matrix;

wherein the surface-area ratio of the Mg—Bi-series compounds in any arbitrary cross section is 0.05% or more.

2. The brazing, monolayer, aluminum-alloy material according to claim 1 , wherein one or more elements selected from the group consisting of Zn: 6.0 mass % or less, In: 0.1 mass % or less, Sn: 0.1 mass % or less, Cu: 0.6 mass % or less, Zr: 0.3 mass % or less, and Ti: 0.3 mass % or less are further included in the brazing, monolayer, aluminum-alloy material.

3. The brazing, monolayer, aluminum-alloy material according to claim 2 , wherein the Zn content is 0.05-4.0 mass %.

4. The brazing, monolayer, aluminum-alloy material according to claim 2 , wherein the Zn content is 0.5-3.0 mass %.

5. The brazing, monolayer, aluminum-alloy material according to claim 1 , wherein one or more elements selected from the group consisting of Sr: 0.1 mass % or less, Na: 0.1 mass % or less, and Sb: 0.3 mass % or less are further included in the brazing, monolayer, aluminum-alloy material.

6. A method of manufacturing an aluminum structure in which the brazing, monolayer, aluminum-alloy material according to claim 1 is used, comprising:

preparing an assembly, which comprises the brazing, monolayer, aluminum-alloy material and an opposing material that makes contact with the brazing, monolayer, aluminum-alloy material, and wherein etching is performed on at least one from among the brazing, monolayer, aluminum-alloy material and the opposing material;

forming a melt, in which a portion of the brazing, monolayer, aluminum-alloy material is melted by heating the assembly under heating conditions in which the temperature is within the range of 580° C.-590° C. and the time is 30 seconds or more; and

preparing the aluminum structure, in which the assembly is brazed by the melt.

7. The brazing, monolayer, aluminum-alloy material according to claim 1 , wherein the Si content is 2.0-3.0 mass %.

8. The brazing, monolayer, aluminum-alloy material according to claim 1 , wherein the Mg content is 0.010-0.200 mass %.

9. The brazing, monolayer, aluminum-alloy material according to claim 1 , wherein the Mg content is 0.010-0.050 mass %.

10. The brazing, monolayer, aluminum-alloy material according to claim 1 , wherein the Bi content is 0.010-0.100 mass %.

11. The brazing, monolayer, aluminum-alloy material according to claim 1 , wherein the Fe content is 0.10-2.00 mass %.

12. The brazing, monolayer, aluminum-alloy material according to claim 1 , wherein the surface-area ratio of the Mg—Bi-series compounds in any arbitrary cross section is 0.10% or more.

13. The brazing, monolayer, aluminum-alloy material according to claim 1 , wherein the brazing, monolayer, aluminum-alloy material has a sheet thickness of less than 0.15 mm.

14. The brazing, monolayer, aluminum-alloy material according to claim 1 , wherein:

the Si content is 2.0-3.0 mass %;

the Mg content is 0.010-0.050 mass %;

the Bi content is 0.010-0.100 mass %; and

the Fe content is 0.10-2.00 mass %.

15. The brazing, monolayer, aluminum-alloy material according to claim 14 , wherein the Zn content is 0.5-3.0 mass %.

16. The brazing, monolayer, aluminum-alloy material according to claim 15 , wherein the surface-area ratio of the Mg—Bi-series compounds in any arbitrary cross section is 0.10% or more.

17. The brazing, monolayer, aluminum-alloy material according to claim 16 , wherein the brazing, monolayer, aluminum-alloy material has a sheet thickness of less than 0.15 mm.

18. A method of manufacturing an aluminum structure, comprising:

providing the brazing, monolayer, aluminum-alloy material according to claim 1 ;

providing an opposing material;

etching at least one of the brazing, monolayer, aluminum-alloy material and the opposing material;

preparing an assembly by placing the brazing, monolayer, aluminum-alloy material in contact with the opposing material;

heating the assembly at temperature within a range of 580° C.-590° C. for 30 seconds or more to generating a melt on a surface of the brazing, monolayer, aluminum-alloy material that contacts the opposing material; and

allowing the melt to solidify to prepare the aluminum structure with one or more brazed joints formed by the solidified melt between the brazing, monolayer, aluminum-alloy material and the opposing material.

19. A monolayer aluminum-alloy material suitable for brazing, having:

an aluminum alloy composition comprising Si: 1.5-3.5 mass %, Fe: 0.05-2.00 mass %, Mn: 0.1-2.0 mass %, Mg: 0.005 mass %-0.500 mass %, and Bi: 0.010-0.500 mass %;

wherein:

the aluminum alloy composition has a metallographic structure in which Mg—Bi-series compounds are dispersed in an Al matrix; and

the surface-area ratio of the Mg—Bi-series compounds in any arbitrary cross section is 0.05% or more.

20. The monolayer aluminum-alloy material according to claim 19 , wherein the aluminum alloy composition:

is present on all outermost surfaces of the monolayer aluminum-alloy material and throughout the monolayer aluminum-alloy material, and

melts in a temperature range of 580° C.-590° C.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (27)