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Article: Use of inert atmosphere reduces scaling of induction-heated forging stock: Part 2; Use of a protective atmosphere during induction preheating of forging billets reduces scaling, resulting in significantly increased life of forging dies compared with preheating in air.(Industrial Gases/Combustion)
- Article from:
- Industrial Heating
- Article date:
- April 1, 2005
- Author:
CopyrightCOPYRIGHT 2005 BNP Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Preheating billet and bar forging stock in fuel combustion direct-flame furnaces results in significant metal loss through oxidation and scaling. It is possible to use a protective atmosphere in preheating forging stock using induction heating. Nitrogen, nitrogen-based atmospheres, argon and other atmospheres can be introduced into the inductor(s) to prevent or reduce oxidation and scaling of the material. Part 1 of this article (February 2005 Industrial Heating) discussed the protective atmosphere/induction heating installation, while results are discussed in this article.
The atmospheres were tested using an Ajax TOCCO Magnethermic Corp. (Warren, Ohio; ...