INVESTIGATION OF PHYSICAL AND MECHANICAL PROPERTIES OF ZRCN COATINGS OBTAINED BY HIGH VELOCITY OXYGEN FUEL METHOD

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Abstract

The use of zirconium carbonitride (ZrCN) coatings has demonstrated a significant increase in hardness and wear resistance of 65G and U8G steels. High velocity oxygen fuel (HVOF) has proved to be an effective method of formation of dense coatings with high adhesion, which contributes to a significant improvement in the performance characteristics of treated surfaces. It was found that microhardness of samples depends on HVOF spraying parameters, as it increases 1.5-2 times after coating. In particular, the microhardness of 65G steel after ZrCN application reached 456.6 HV, and for U8G steel this index was 649.7 HV. The obtained results confirm the high efficiency of ZrCN in improving the mechanical and operational properties of steels, which is due to their significant hardness, increased wear resistance and high adhesion. This makes these coatings promising for application in conditions of intensive mechanical and abrasive impact.