In-situ TiC precipitation in molten Fe-C and their characterisation by K. I. Parashivamurthy, P. Sampathkumaran, and S. Seetharamu

Crystal Research and Technology

Cryst. Res. Technol. 43, 674 (2008) - Abstract -

In-situ TiC precipitation in molten Fe-C and their characterisation

K. I. Parashivamurthy, P. Sampathkumaran*, and S. Seetharamu*

Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur – 572 103, Karnataka, India
*Materials Technology Division, Central Power Research Institute, Bangalore- 560 080, Karnataka, India

Keywords	ferrous matrix, titanium carbide, precipitation, crystal morphology
PACS	81.05.Je
DOI	10.1002/crat.200711103

TiC particles were formed in liquid iron solution by the reaction between pure titanium and carbon available in molten iron. TiC particles have been precipitated in steels with four different carbon contents by in situ reactions during melting. The influence of titanium and carbon concentration on the precipitation of TiC was studied. The samples were studied by means of optical microscopy, scanning electron microscopy and X-ray microanalysis. The morphology of the obtained crystals was studied and correlated with carbon and titanium. It was found that TiC crystallises as primary crystals at 1600°C during solidification of the Fe-Ti-C melt. The obtained crystals were of cubic, rectangle and had maximum size of 18.7 μm. The size and shape of the carbides increases with increasing carbon and titanium in molten iron.

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