Impact Wear of the Protective Cr3C2-Based HVOF-Sprayed Coatings

Materials

卷:13

Jan Grossman¹  Josef Daniel¹  Martin Bystrianský²  Šárka Houdková³ 

[1] Institute of Scientific Instruments of the Czech Academy of Sciences, Královopolská 147, 612 64 Brno, Czech Republic;

[2] Regional Technological Institute, University of West Bohemia, 306 14 Plzeň, Czech Republic;

[3] Research and Testing Institute in Plzeň, Tylova 46, 301 00 Plzeň, Czech Republic;

关键词: HVOF;    hardmetal;    chromium carbide;    dynamic impact test;    impact wear;    thermal spraying;   

DOI  :  10.3390/ma13092132

来源: DOAJ

【 摘 要 】

High velocity oxygen-fuel (HVOF) prepared CrC-based hardmetal coatings are generally known for their superior wear, corrosion, and oxidation resistance. These properties make this coating attractive for application in industry. However, under some loading conditions and in aggressive environments, the most commonly used NiCr matrix is not sufficient. The study is focused on the evaluation of dynamic impact wear of the HVOF-sprayed Cr₃C₂-25%NiCr and Cr₃C₂-50%NiCrMoNb coatings. Both coatings were tested by an impact tester with a wide range of impact loads. The Wohler-like dependence was determined for both coatings’ materials. It was shown that, due to the different microstructure and higher amount of tough matrix, the impact lifetime of the Cr₃C₂-50%NiCrMoNb coating was higher than the lifetime of the Cr₃C₂-25%NiCr coating. Differences in the behavior of the coatings were the most pronounced at high impact loads.

【 授权许可】

Unknown