Patent · US Expired

Processing of copper alloys

US4599120A · kind A · utility

16Cited by

5References

5Claims

0Family size

Assignee

BRUSH WELLMAN, INC. · US

Inventors

Nathan Church · Chagrin Falls, US
W. Raymond Cribb · Mentor, US
John C. Harkness · Lakewood, US

Key dates

Filing date	Feb 25, 1985
Grant date	Jul 8, 1986
Priority date	—
Expiry date	Feb 25, 2005

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K35/402
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

This invention is directed to the treatment of copper beryllium alloys, and to articles and parts made therefrom, containing special small amounts of beryllium and nickel, e.g., about 0.05% to about 0.5% beryllium and about 0.05% to about 1% nickel where cobalt may be substituted for up to about one-half of said nickel content at a substitution ratio of about 1 part by weight cobalt for about 2 parts by weight nickel, which imparts to these alloys a superior combination of stress relaxation resistance, formability, ductility, conductivity and strength by the process of solution annealing, cold working at least about 50% or at least about 70% or 90% or more and age hardening.

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