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Studies on Hardfaced Overlay of Diamond Grits Reinforced Ni-Based Alloy Fabricated by Laser Cladding

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Abstract

In this work, a hardfaced overlay of diamond grits reinforced Ni-based alloy was attempted to fabricate on carbon steel by laser cladding technique. In order to obtain the optimal microstructures of hardfaced overlay, the different heat inputs were experimented by varying laser power and sweep speed. The results testify that the hardfaced overlay can be successfully obtained. SEM observation shows that most diamond grits are buried in the overlay, and a few is exposed on the surface. When laser energy density is ranged from 28.6 to 32.0 J/mm2, the diamond grits are wetted well and bonded tightly with Ni-based alloy. A consecutive compound layer is formed at the interface of diamond and Ni-based alloy. Raman spectra analysis indicates that the diamond grits suffer from thermal damages when the laser energy density is higher than 32.0 J/mm2.

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Acknowledgments

The research work was supported by Open Project Fund of Key Laboratory of Shenyang Ligong University (Project Number 4771004kfs05), State Key Lab of Advanced Welding and Joining, Harbin Institute of Technology, and by Open Project Fund of Key Disciplines of Shenyang Ligong University (Project Number 4771004kfx04). Additionally, the authors would like to thank Doctor YuHui Zhao (Shenyang Institute of Automation, Chinese Academy of Sciences) for providing laser apparatus, and thank Doctor ZhiMing Zhang (Institute of Metal Research, Chinese Academy of Sciences) for assisting in Raman spectra inspection of the diamond surface.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Shenyang Ligong University, Shenyang, 110159, China

    HuanHuan Sun, FanLing Meng & AiGuo Liu

  2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China

    MianHuan Guo

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  1. HuanHuan Sun
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  2. MianHuan Guo
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  3. FanLing Meng
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  4. AiGuo Liu
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Correspondence to HuanHuan Sun.

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Sun, H., Guo, M., Meng, F. et al. Studies on Hardfaced Overlay of Diamond Grits Reinforced Ni-Based Alloy Fabricated by Laser Cladding. Trans Indian Inst Met 69, 1369–1376 (2016). https://doi.org/10.1007/s12666-015-0668-8

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  • DOI: https://doi.org/10.1007/s12666-015-0668-8

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