Furnace for the partial heat treatment of work tools

US4682011A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Gerhard Hoffmann · Otterstadt, DE
• Rudolf Bauer · Hallerndorf, DE
• Paul Heilmann · Maintal, DE
• Erwin Schumann

Key dates

• Filing date: Nov 5, 1985
• Grant date: Jul 21, 1987
• Expiry date: Nov 5, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D9/22
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

For the partial heat treatment of tools which have a work surface and a clamping in region, there is disclosed a furnace, the useful space of which is subdivided into two separate heating spaces by a plate made of heat insulating material whereby the temperature in these heating spaces is lowered by disconnection of the connecting members between the individual heating elements of the all-around heating and the clamping in region of the work tools may be maintained below the conversion temperature of the metal.