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Microstructure and Properties of the Stellite6/WC Composite Coatings Prepared by Laser Cladding

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Abstract

To improve the microhardness and wear resistance of Q235 steel, Stellite6/WC composite coatings were prepared on the surface of Q235 steel by laser cladding mixed powder (Stellite6, WC, W, and C powder) on its surface. The microstructure and mechanical properties of directly added WC and in situ synthesized WC were analyzed and compared by scanning electron microscope(SEM), X-ray diffractometer(XRD), microhardness tester, and friction and wear testing machine. The results showed that the main phases of the composite coatings were the γ-Co, Cr7C3, CoCx, WC, and W2C. The change of microhardness in the middle and lower parts of the composite coatings prepared by in-situ synthesized WC was smaller than that of the directly added WC. The best wear resistance was obtained for the composite coating with 12 wt% WC direct addition, which was slightly better than the composite coating with 3 wt% W in-situ. This is because when the amount of W was more than 6 wt%, some W particles could not be completely synthesized in situ in the friction test, and are easy to fall off, and the wear resistance of the cladding layer decreased sharply.

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Funding

This work was supported by the Natural Science Foundation of Hebei Province (No. E2021209026).

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Authors and Affiliations

  1. College of Mechanical Engineering, North China University of Science and Technology, Tangshan, 063210, People’s Republic of China

    Haoqiang Zhang, Hao Liu, Chengxiang Ren, Zhifeng Li & Suoxia Hou

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Contributions

Conceptualization: Haoqiang Zhang, Suoxia Hou; Methodology: Chengxiang Ren, Suoxia Hou; Formal analysis and investigation: Chengxiang Ren, Zhifeng Li; Writing - original draft preparation: Hao Liu, Chengxiang Ren; Writing - review and editing: Hao Liu; Funding acquisition: Haoqiang Zhang. All authors read and approved the final manuscript.

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Correspondence to Suoxia Hou.

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Zhang, H., Liu, H., Ren, C. et al. Microstructure and Properties of the Stellite6/WC Composite Coatings Prepared by Laser Cladding. Lasers Manuf. Mater. Process. 10, 645–658 (2023). https://doi.org/10.1007/s40516-023-00228-3

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