Microstructure and wear resistance of WC particle reinforced Fe based alloy coating

doi:10.13251/j.issn.0254-6051.2023.10.042

Abstract

Abstract: Plasma melt injection(PMI) was used to prepare WC particles reinforced metal matrix composites layer on the 45 steel. During the PMI process, different voltage parameters were applied. The clad coating were analyzed by optical microscope (OM), scanning electron microscopy (SEM),X-ray diffraction(XRD) and energy dispersive spectrometer(EDS) to study microstructure, phase composition and chemical compositions of the clad coating. And a self-made friction and wear tester was used for wear characteristics analysis. SEM analysis result reveals that the clad coating, being metallurgical bonding with base material, is crack-free, and the WC particles distribute uniformly in the clad coating. In addition, the primary phase of the clad coating contains WC, W₂C, Cr₂₃C₆, Fe₃W₃C, Cr₃C₂ and Cr₇C₃. The maximum hardness of the clad coating is about 1600 HV. The friction and wear test results show that the wear loss of the plasma clad coating with WC reduces by more than 50% compared with that of the Fe based alloy coating. The main mechanism of wear is abrasive wear, with a large number of WC particles hindering micro cutting and exhibiting high wear resistance.

Key words: plasma melt injection, metal matrix composites, microstructure, wear resistance, WC particles

CLC Number:

TG455

Gao Wandong. Microstructure and wear resistance of WC particle reinforced Fe based alloy coating[J]. Heat Treatment of Metals, 2023, 48(10): 274-278.

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