Patent · US Expired

Flux for brazing difficult to wet metallic materials

US6613159B1 · kind B1 · utility

13Cited by

1References

18Claims

0Family size

Assignee

Degussa-Huels AG · DE

Inventors

Jurgen Koch · Refrath, DE
Sandra Wittpahl · Obertshausen, DE
Wolfgang Weber · Hemau, DE
Wolfgang Kohlweiler · Frankfurt, DE

Key dates

Filing date	May 5, 2000
Grant date	Sep 2, 2003
Priority date	—
Expiry date	May 5, 2020

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K35/025
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A flux based on inorganic boron and/or halogen compounds for brazing difficult to wet metallic materials with silver- and copper-based solders, which contains, as an activating addition, based on the total amount of the flux, 0.01-10 wt. % of elemental boron and 0.01-10 wt. % of at least one of the elements Mo, W, Mn, Co, Ni, Pd, Cu or Ag in the form of elements, alloys or compounds. The activating addition brings about a substantial increase in the wettability by the solder, particularly in the case of difficult to wet stock materials.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.