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Study on an Fe–TiC surface composite produced in situ

✍ Scribed by Yisan Wang; Xinyuan Zhang; Fengchun Li; Guangting Zeng

Publisher
Elsevier Science
Year
1999
Weight
462 KB
Volume
20
Category
Article
ISSN
0261-3069

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✦ Synopsis

An Fe᎐TiC surface composite, with a thickness of 4.2 mm, consisting of self-lubricant graphites and chromium᎐carbides was produced in situ on a surface of cast steel by a liquid reaction casting technique. The structure and composition of the Fe᎐TiC surface composite were studied with the help of a SEM and an electron probe. From the outside in, the concentration of Ti, Cr, Si and Ni took on a gradient distribution and decreased gradually into that of a master-alloy, the morphology of chromium᎐carbides transformed from strip᎐chunky into chrysanthemum and make-and-break reticulation in turn. The particle size of TiC was in the range 1᎐3 m, the volume fraction of TiC particles was up to 38% in the subsurface layer, and with the distance from the outside increasing, the volume fraction of TiC particles decreased gradually. Under the condition of dry slipping with a heavy load, the Fe᎐TiC surface composite offers virtually unique wear-resistance.

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