Patent · US Expired

Method for soldering hard substances onto steels

US5400946A · kind A · utility

13Cited by

7References

9Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Wolfgang Weise · Frankfurt, DE
Harald Krappitz · Kirchheim unter Teck, DE
Willi Malikowski · Aschaffenburg, DE

Key dates

Filing date	Oct 27, 1993
Grant date	Mar 28, 1995
Priority date	—
Expiry date	Oct 27, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/12903
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

When hard-substance parts are soldered onto steel bases, thermal stresses are produced between the hard substance and the steel. These stresses can be reduced by means of using a multilayer solder in which the middle layer consists of a precipitation-hardenable copper alloy or nickel alloy provided on both sides with a layer of a hard-solder alloy whose working temperature is at least 50.degree. C. below the melting point of the precipitation-hardenable copper alloy or nickel alloy. A tempering treatment at 250.degree. to 550.degree. C. is carried out after the soldering in order to achieve a precipitation hardening of the middle layer.

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