Process for fabricating articles of tungsten-nickel-iron alloy

US3979234A · kind A · utility

Assignee

• The United States of America as represented by the United States Energy Research and Development Administration · US

Inventors

• Walter G. Northcutt, Jr. · Oak Ridge, US
• William B. Snyder, Jr. · Greenville, US

Key dates

• Filing date: Sep 18, 1975
• Grant date: Sep 7, 1976
• Expiry date: Sep 18, 1995

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2999/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A high density W--Ni--Fe alloy of composition 85-96% by weight W and the remainder Ni and Fe in a wt. ratio of 5:5-8:2 having enhanced mechanical properties is prepared by compacting the mixed powders, sintering the compact in reducing atmosphere to near theoretical density followed by further sintering at a temperature where a liquid phase is present, vacuum annealing, and cold working to achieve high uniform hardness.