Microstructure and Properties of New Developed Fe-Cr-C-B Powders for Wear-Protection Purposes

This paper discusses the development of Fe-Cr-C-B powder feedstocks for the production of wear-resistant coatings by HVOF spraying. Chromium content in the powder is in the range of 30 wt% and carbon content is about 5 wt%, yielding a unique powder structure that results in coatings with high and well distributed carbide content. Powder and coating microstructure are examined and the results of wear tests are presented. The extent to which the powders can substitute for conventional carbide coatings is discussed as well.