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J. Mater. Sci. Technol. 2009, 25(02) 199-202 DOI:     ISSN: 1005-0302 CN: 21-1315/TG
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Keywords
Pulse electric current
Spherical graphite iron
Cementite
Decomposition
Authors
Qingchun Li
Guowei Chang
Qijie Zhai
PubMed
Article by
Article by
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Cementite Decomposition in Spherical Graphite Iron by Electropulsing

Qingchun Li1)†, Guowei Chang1) and Qijie Zhai2)

1) Department of Materials and Chemical Engineering, Liaoning University of Technology, Jinzhou 121001, China
2) Department of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

Abstract：

The influence of electropulsing on cementite decomposition in the spherical graphite iron has been studied.  The results indicated that the cementite was decomposed in a short time by high current density electropulsing. With increasing electropulsing time, the in situ nucleation of graphite in cementite was accompanied with the quick decomposition of cementite. The dislocation accumulation adjacent to the cementite and the quick diffusion of carbon atom by electropulsing were main reasons for the quick decomposition of cementite. The in situ nucleation of graphite in the cementite resulted from the dislocation climbing crossing the cementite lamellae.

Keywords： Pulse electric current   Spherical graphite iron   Cementite   Decomposition  
Received 2007-11-02 Revised 2008-01-11 Online: 2009-10-10 
DOI:
Fund:

the Department of Education of Liaoning Province, China (No. 2008T089)

Corresponding Authors:
Email: lqcsusan@126.com
About author:
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