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Journal of Applied Sciences
  Year: 2010 | Volume: 10 | Issue: 13 | Page No.: 1255-1262
DOI: 10.3923/jas.2010.1255.1262
 
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Direct Partial Remelting of XW-42 Steel in Semi-Solid Zone

A. Alfan, M.Z. Omar, J. Syarif and Z. Sajuri

Abstract:
Microstructure that consists of spheroid grains in liquid matrix is desirable for semi-solid metal forming. In this study, a direct partial remelting from as annealed condition was used to examine microstructural evolution of XW-42 steel prior to thixoforming process. It was found out that M7C3 carbides dissolve inside the semi solid zone (between 1250-1270°C) while M23C6 carbides dissolve completely before entering semi-solid zone. The dissolution of these grain boundary carbides during partial remelting helps the grain spheroidisation of the XW-42 steel samples. Partial remelting at 1300 and 1340°C resulted in the formation of relatively spherical grains with liquid percent around 17%. The results indicate the suitability of these steel as a potential material for thixoforming through direct partial remelting route.
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How to cite this article:

A. Alfan, M.Z. Omar, J. Syarif and Z. Sajuri, 2010. Direct Partial Remelting of XW-42 Steel in Semi-Solid Zone. Journal of Applied Sciences, 10: 1255-1262.

DOI: 10.3923/jas.2010.1255.1262

URL: https://scialert.net/abstract/?doi=jas.2010.1255.1262

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