Method of producing a tantalum stock material of high ductility

US4844746A · kind A · utility

Assignee

• W. C. Heraeus GmbH · DE

Inventors

• Michael Hormann · Bodenwerder, DE
• Otto Bach · Schöneck, DE

Key dates

• Filing date: Mar 23, 1988
• Grant date: Jul 4, 1989
• Expiry date: Mar 23, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22F1/18
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method is described for the production of a ductile tantalum stock material for high-speed deformation use. A bar-shaped body is made from directly reduced tantalum powder of a given purity and is remelted repeatedly as a consumable electrode in an electron beam furnace. The obtained ingot is shaped into a slab which, after being machined to a smooth surface, is further worked to produce the stock material. At least one heat treatment under vacuum is included in the process of making the stock material.