Title

Undissolved Ferrite Can Affect Performance

Abstract

Free ferrite is the most detrimental of the nonmartensitic microstructures and also affects the performance of the product is discussed. Poor quench severity and incomplete austenitization are leading causes for the presence of non-martensitic microstructures in heat-treated steel. Incomplete austenitization can result from overloading a furnace, improper load distribution, temperature gradients and temperature controller that is out of calibration. Undissolved ferrite is relatively easy to recognize by the characteristic shape created as austenite grows into the ferrite. The scale of the starting ferrite and pearlite microstructure is very important when considering induction hardening. Two approaches reduce the amount of undissolved ferrite in induction-heated components.

Department(s)

Materials Science and Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2001 BNP Media, Inc. , All rights reserved.

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