Tribological behavior of borocarburized layer on low-carbon steel treated by double glow plasma surface alloying

In this paper, the performance of low-carbon steel is enhanced after introducing a borocarburized diffusion layer via double glow plasma surface alloying technology. Due to the boron-carbon gradient structure of low-carbon steel, the protective coating exhibits an excellent wear and corrosion resistance. Interestingly, the borocarburized layer consists of a 64 μm carburized layer and a 27 μm boride layer, which plays an effective role in enhancing the microhardness of borocarburized low-carbon steel, exhibiting a 1440 Vickers hardness increase in the surface microhardness of low-carbon steel. The potentiodynamic polarization measurement and impedance measurement results indicate that the boride protective film can effectively prevent aggressive chloride ions from invading the substrate, which indicates an excellent property of corrosion resistance. This systematic study paves a promising way for the future application of hard coatings in severe environments.

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A study on tribological behavior of double-glow plasma surface alloying W-Mo coating on gear steel

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2015.08.003 ◽

2015 ◽

Vol 278 ◽

pp. 92-98 ◽

Cited By ~ 24

Author(s):

Zhong-Kai Qiu ◽

Ping-Ze Zhang ◽

Dong-Bo Wei ◽

Xiang-Fei Wei ◽

Xiao-Hu Chen

Keyword(s):

Tribological Behavior ◽

Surface Alloying ◽

Plasma Surface ◽

Gear Steel ◽

Glow Plasma ◽

Plasma Surface Alloying

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Tribological Properties of Double-Glow Plasma Surface Niobizing on Low-Carbon Steel

Tribology Transactions ◽

10.1080/10402004.2014.913326 ◽

2014 ◽

Vol 57 (5) ◽

pp. 786-792 ◽

Cited By ~ 5

Author(s):

Ya Wang ◽

Pingze Zhang ◽

Hongyan Wu ◽

Dongbo Wei ◽

Xiangfei Wei ◽

...

Keyword(s):

Carbon Steel ◽

Tribological Properties ◽

Low Carbon Steel ◽

Low Carbon ◽

Plasma Surface ◽

Glow Plasma

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Precipitation Behavior on Carbon Steel Modified by Double Glow Plasma Surface Alloying with W and Mo

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.42.1994 ◽

2001 ◽

Vol 42 (9) ◽

pp. 1994-1997

Author(s):

Bin Zhao ◽

Jiansheng Wu ◽

Zhong Xu ◽

Zhonghou Li ◽

Xiaoping Liu

Keyword(s):

Carbon Steel ◽

Surface Alloying ◽

Precipitation Behavior ◽

Plasma Surface ◽

Glow Plasma ◽

Plasma Surface Alloying

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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 ◽

10.2298/jmmb181031022d ◽

2019 ◽

Vol 55 (2) ◽

pp. 227-234 ◽

Cited By ~ 2

Author(s):

D.-B. Wei ◽

H.-X. Liang ◽

S.-Q. Li ◽

F.-K. Li ◽

F. Ding ◽

...

Keyword(s):

Wear Resistance ◽

Powder Metallurgy ◽

Tribological Behavior ◽

Alloy Coating ◽

Nanoindentation Test ◽

Surface Alloying ◽

Plasma Surface ◽

Before And After ◽

Glow Plasma ◽

Plasma Surface Alloying

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 morphology, microstructure and phase composition were investigated by SEM, EDS and XRD. The hardness was examined by Vickers hardness test and nanoindentation test. The tribological behavior of powder metallurgy 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 indicate that the W-Mo alloy coating is homogeneous without defects, which includes deposition layer and interdiffusion layer. The average microhardness of powder metallurgy gears before and after plasma surface alloying is 145.8 HV0.1 and 344.4 HV0.1, respectively; Nano hardness of deposition layer and interdiffusion layer is 5.76 GPa, 14.35 GPa, respectively. The specific wear rate of W-Mo alloy coating is lower than original PM gears. The wear mechanism of W-Mo alloy coating is slight adhesive wear. The W-Mo alloy coating prepared by double glow plasma surface alloying technology can effectively improve wear resistance of powder metallurgy gears.

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