Microstructure and tribological behavior of W-Mo alloy coating on powder metallurgy gears based on double glow plasma surface alloying technology

  • Dongbo Wei Nanjing University of Aeronautics and Astronautics
  • Hongxuan Liang Nanjing University of Aeronautics and Astronautics
  • Shuqin Li Nanjing University of Aeronautics and Astronautics
  • Fengkun Li Nanjing University of Aeronautics and Astronautics
  • Feng Ding Nanjing University of Aeronautics and Astronautics
  • Shiyuan Wang Nanjing University of Aeronautics and Astronautics
  • Zili Liu Nanjing University of Aeronautics and Astronautics
  • Pingze Zhang Nanjing University of Aeronautics and Astronautics

Abstract


In the present paper, plasma surface alloying was implemented on powder metallurgy gears to improve its wear resistance based on double glow plasma surface metallurgy technology. A W-Mo alloy coating was obtained in the process. The morphologies, microstructure and phase composition were investigated by SEM, EDS and XRD. The hardness was examined by Vickers hardness test and nano-indentation test. The tribological behavior of PM gears before and after plasma surface alloying was evaluated on a ball-on-disc reciprocating sliding tribometer under dry sliding condition at room temperature. The results are as follow. The W-Mo alloy coating was dense and homogeneous without defects, which included deposition layer and interdiffusion layer. Microhardness of PM gears before and after plasma surface alloying were 145.8HV0.1 and 344.4HV0.1, respectively; Nano hardness of deposition layer and interdiffusion layer was 5.76GPa, 14.35GPa, respectively. The specific wear rate of W-Mo alloy coating was lower than the original PM gears. The wear mechanism of W-Mo alloy coating was slight adhesive wear. The W-Mo alloy coating prepared by double glow plasma surface alloying technology can effectively improve the surface wear resistance of powder metallurgy gears.

Author Biographies

Dongbo Wei, Nanjing University of Aeronautics and Astronautics

College of Materials Science and Technology，

Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing University of Aeronautics and Astronautics)

Hongxuan Liang, Nanjing University of Aeronautics and Astronautics
College of Materials Science and Technology
Shuqin Li, Nanjing University of Aeronautics and Astronautics
College of Materials Science and Technology
Fengkun Li, Nanjing University of Aeronautics and Astronautics

College of Materials Science and Technology

Feng Ding, Nanjing University of Aeronautics and Astronautics

College of Materials Science and Technology

Shiyuan Wang, Nanjing University of Aeronautics and Astronautics

College of Materials Science and Technology,

Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing University of Aeronautics and Astronautics)

Zili Liu, Nanjing University of Aeronautics and Astronautics
College of Materials Science and Technology
Pingze Zhang, Nanjing University of Aeronautics and Astronautics

College of Materials Science and Technology,

Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing University of Aeronautics and Astronautics),

Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology

Published
2019/07/25
How to Cite
Wei, D., Liang, H., Li, S., Li, F., Ding, F., Wang, S., Liu, Z., & Zhang, P. (2019). Microstructure and tribological behavior of W-Mo alloy coating on powder metallurgy gears based on double glow plasma surface alloying technology. Journal of Mining and Metallurgy, Section B: Metallurgy, 55(2), 227. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/19353
Issue
Vol. 55 No. 2 (2019)
Section
Original Scientific Paper

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