Flux composition
AssigneeUacj Corporation
InventorsHidetoshi Kumagai, Yuji Hisatomi, Naoki Yamashita
Life of this patent
Estimating the term…
Abstract
A flux composition includes a component (A) that is a powder of an alkali metal zinc fluoroaluminate represented by “MwZnxAlyFz (1)” (wherein M is K or Cs, and w, x, y, and z are a positive integer, the greatest common divisor of w, x, y, and z being 1), the content of the component (A) in the flux composition being 50 mass % or more. The flux composition prevents occurrence of a brazing defect and discoloration even when an aluminum alloy is brazed in an atmosphere having a high oxygen concentration, or an atmosphere having high humidity.
Claims7
A flux composition comprising:
- a component (A) that is a powder of an alkali metal zinc fluoroaluminate represented by a general formula (1), the content of the component (A) in the flux composition being 50 mass % or more,
- MwZnxAlyFz (1)
- wherein M is K or Cs, and w, x, y, and z are a positive integer, the greatest common divisor of w, x, y, and z being 1, and
- a component (B) that is at least one powder selected from the group consisting of a powder of an alkali metal fluoroaluminate and a powder of an alkali metal fluorozincate.
A flux composition comprising:
- a component (A) that is a powder of an alkali metal zinc fluoroaluminate represented by a general formula (1), the content of the component (A) in the flux composition being 50 mass % or more,
- MwZnxAlyFz (1)
- wherein M is K or Cs, and w, x, y, and z are a positive integer, the greatest common divisor of w, x, y, and z being 1, and
- a component (C) that is at least one metal powder selected from the group consisting of a powder of an aluminum alloy an Al powder, an Si powder, a Cu powder, and a Zn powder, the aluminum alloy comprising at least one metal element selected from the group consisting of Si, Cu, and Zn.
A flux composition comprising a component (A) that is a powder of an alkali metal zinc fluoroaluminate represented by the general formula (1), a component (B) that is one type of powder or two or more types of powders selected from a powder of an alkali metal fluoroaluminate and a powder of an alkali metal fluorozincate, and a component (C) that is at least one metal powder selected from the group consisting of a powder of an aluminum alloy, an Al powder, an Si powder, a Cu powder, and a Zn powder, the aluminum alloy comprising at least one metal element selected from the group consisting of Si, Cu, and Zn.
Dependencies are inferred from the claim text.