MICROSTRUCTURE AND MECHANICAL PROPERTIES OF Mo-MODIFIED Ti6Al4V SPUR GEAR

Yong Ma, Xiaoyan Niu (), Lin Qin (), Naiming Lin (), Xiangyu Zhang () and Bin Tang ()
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Yong Ma: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China
Xiaoyan Niu: #x2020;College of Civil Engineering, Hebei University, Baoding, Hebei 071002, P. R. China
Lin Qin: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China
Naiming Lin: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China
Xiangyu Zhang: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China
Bin Tang: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China

Surface Review and Letters (SRL), 2017, vol. 24, issue 03, 1-10

Abstract: In order to improve the performance of the Ti6Al4V (TC4) spur gear, a Mo surface modified layer is prepared by the plasma surface metallurgy technique. The element concentration, microstructure and elastoplastic properties are investigated with glow-discharge optical emission spectroscope (GDOES), scanning electron microscope, optical microscope (OM) and nanoindenter. Engaging with 41Cr4 steel gears, the wear resistances of the treated and untreated TC4 spur gears are evaluated through running-in and operation tests performed by a friction and wear tester under lubricated conditions. By finite element analysis, contact stress distributions in the TC4 and 41Cr4 spur gears pair are quantitatively determined. The results indicate that, being compact and uniform, the Mo-modified layer has higher hardness and retains relatively fine plasticity. The wear resistance of the treated TC4 spur gear is improved significantly.

Keywords: TC4 spur gear; plasma surface alloying; nanoindentation; wear testing (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X17500305

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