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Particle Characteristics and Densification of W6Mo5Cr4V2Co5Nb Overspray Powder

  • Powder Metallurgy of Non-Ferrous Metals
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Abstract

W6Mo5Cr4V2Co5Nb (825 K) alloy was prepared by a two-step sintering process from overspray 825 K alloy powder. The overspray powder characteristics and the microstructure and mechanical properties of the as-sintered 825 K alloy were investigated. Results showed that two types of carbides formed a network structure in the overspray powder, which had spherical or quasispherical shape: one was MC carbide that was rich in vanadium (V), and the other was M2C carbide enriched with vanadium (V) and tungsten (W). The sintered 825 K alloy contained M6C and MC carbides, of which M6C was rich in tungsten (W) and molybdenum (Mo), and both of these two carbides were uniformly distributed in the alloy matrix. The alloy had relative density of 98.43%, hardness of HRC 51.8, and superior bending strength of 2042 MPa. These mechanical properties can meet the requirements of most engineering applications.

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Acknowledgements

This research is sponsored by the National High Technology Research and Development Program of China (863 Program) under Grant No. 2012AA03A509 and the National Natural Science Foundation of China (No. 51204015).

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Authors and Affiliations

  1. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China

    Ziqiang Pi, Xin Lu, Bowen Liu, Chengchang Jia & Xuanhui Qu

  2. Waikato Centre for Advanced Materials, School of Engineering, University of Waikato, Hamilton, 3240, New Zealand

    Fei Yang

  3. HEYE Special Steel Co., Ltd, Shijiazhuang, 052165, China

    Wei Zheng, Lizhi Wu & Qingli Shao

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  1. Ziqiang Pi
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  2. Xin Lu
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  4. Bowen Liu
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  5. Chengchang Jia
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  6. Xuanhui Qu
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  7. Wei Zheng
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  8. Lizhi Wu
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  9. Qingli Shao
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Correspondence to Xin Lu or Fei Yang.

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Pi, Z., Lu, X., Yang, F. et al. Particle Characteristics and Densification of W6Mo5Cr4V2Co5Nb Overspray Powder. JOM 70, 2224–2229 (2018). https://doi.org/10.1007/s11837-018-2926-9

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  • DOI: https://doi.org/10.1007/s11837-018-2926-9

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