MICROSTRUCTURE EVOLUTION OF HYPEREUTECTOID STEELS DURING WARM DEFORMATION II. Cementite Spheroidization and Effects of Al | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

2606694

Reference Type

Journal Article

Title

MICROSTRUCTURE EVOLUTION OF HYPEREUTECTOID STEELS DURING WARM DEFORMATION II. Cementite Spheroidization and Effects of Al

Author(s)

Chen Wei; Li Longfei; Yang Wangyue; Sun Zuqing; Zhang Yan

Year

2009

Is Peer Reviewed?

Yes

Journal

Jinshu Xuebao
ISSN: 0412-1961

Volume

Issue

Page Numbers

156-160

Web of Science Id

WOS:000264304600005

Abstract

The effects of Al on the spheroidization of cementite and the formation of ultrafine (alpha+theta) microstructure of hypereutectoid steel during isothermal spheroidizing and warm deformation were investigated by uniaxial hot compression simulation experiment. The results indicate that during isothermal spheroidizing, the fine grained cementite particles and ferrite are obtained by addition of Al. Ultrafine (alpha+theta) microduplex microstructures can be formed by warm deformation in a very short time. During warm deformation, the diffusion of carbon and iron atoms are impeded with the addition of Al, the spheroidization of lamellar cementite and the coarsening of cementite particles are retarded. And the re-precipitation of cementite particles in ferrite matrix is also restricted, resulting in a more ultrafine (alpha+theta) microduplex microstructure.

Keywords

hypereutectoid steel; warm deformation; cementite; spheroidization; Al