scholarly journals A New Plasma Surface Alloying to Improve the Wear Resistance of the Metallic Card Clothing

2019 ◽  
Vol 9 (9) ◽  
pp. 1849 ◽  
Author(s):  
Dongbo Wei ◽  
Fengkun Li ◽  
Shuqin Li ◽  
Xiaohu Chen ◽  
Feng Ding ◽  
...  
Keyword(s):  
Wear Resistance ◽  
High Hardness ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Wear Rates ◽  
Before And After ◽  
Glow Plasma ◽  
Surface Morphologies ◽  
And Diffusion ◽  
Plasma Surface Alloying

A new surface strengthening process: Plasma surface chromizing was implemented on the metallic card clothing to improve its wear resistance based on double glow plasma surface metallurgy technology. A chromizing coating was prepared in the process, which consisted of a deposited layer and diffusion layer. The surface morphologies, microstructure, phase composition, and hardness were analyzed in detail. The friction behaviors of the metallic card clothing before and after plasma surface alloying were comparatively analyzed under various sliding speeds at room temperature. The results showed that: 1. The chromizing coating on the surface of metallic card clothing was dense and homogeneous without defects, and the metallic card clothing still maintained its integrity and sharpness. 2. The chromizing coating consist of [Fe,Cr], Cr, Cr23C6, and Cr7C3, which contribute to the high hardness. 3. The average microhardness of metallic card clothing increased from 365.4 HV0.05 to 564.9 HV0.05 after plasma surface chromizing. Nano hardness of the chromizing coating was approximately 1.87 times than the metallic card clothing. 4. At various sliding velocities of 2 m/min, 4 m/min, and 6 m/min, the specific wear rates of metallic card clothing were 16.38, 9.06 and 6.26 × 10−4·mm3·N−1·m−1, and the specific wear rates of metallic card clothing after plasma surface chromizing were 2.91, 3.30, and 2.95 × 10−4·mm3·N−1·m−1. Furthermore, the wear mechanism of the chromizing coating gradually changed from adhesive wear to abrasive wear as the sliding velocity increased. The results indicate that the wear resistance of metallic card clothing was improved obviously after plasma surface chromizing.

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

2019 ◽  
Vol 55 (2) ◽  
pp. 227-234 ◽  
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.

Preparation and Wear Resistance of TiN/Ti Deposition and Diffusion Multi-Layers by Plasma Alloying Process

2007 ◽  
Vol 353-358 ◽  
pp. 1712-1715
Author(s):  
Yan Ping Liu ◽  
Fei Xing
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Crystal Surface ◽  
Steel Substrate ◽  
Surface Alloying ◽  
Tin Film ◽  
Glow Plasma ◽  
And Diffusion ◽  
Plasma Surface Alloying Technique ◽  
Plasma Surface Alloying

High quality TiN/Ti multi-layers have been successfully obtained on a carbon steel substrate by double glow plasma surface alloying technique (DGP). The TiN/Ti multi-layers consists of deposition layer and diffusion layer, and then on its surface TiN film (PVD) is deposited to form TiN/TiN/Ti compound multi-layers. In addition, studies were carried to compare TiN/Ti multi-layers, TiN/TiN/Ti compound multi-layers and TiN film (PVD) directly deposited on the surface of the carbon steel and their microhardness and dry friction-abrasion properties were also investigated. The results show that the thickness of TiN/Ti multi-permeated layers is above 10*m; Ti and N concentrations change gradually along the depth of alloying layer. TiN/Ti multi-layers and substrates are metallurgically bonded. Preferred orientation of TiN/Ti multi-layers is crystal surface (200). The hardness of the TiN/Ti multi-permeated layers ranges up 2200HV, its average friction coefficient is lower, abrasion crack is shallower and wear resistance better.

Improvement in Wear and Corrosive Wear Resistance of Ti6Al4V Alloy by Double Glow Plasma Surface Alloying with W-Mo and W-Mo-N

2011 ◽  
Vol 675-677 ◽  
pp. 1253-1257 ◽  
Author(s):  
Chang Bin Tang ◽  
Dao Xin Liu ◽  
Fan Qiao Li ◽  
Bin Tang ◽  
Lin Qin
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Ambient Air ◽  
Corrosive Wear ◽  
Surface Alloying ◽  
Nacl Solution ◽  
Plasma Surface ◽  
Glow Plasma ◽  
Surface Modified ◽  
Plasma Surface Alloying

W-Mo and W-Mo-N surface-modified layers on Ti6Al4V alloy were obtained using a double glow plasma surface alloying technique. The morphology, microstructure, and chemical composition distribution of the modified layers were analyzed by scanning electron microscope, Xray diffraction, and glow discharge optical emission spectrometry. The hardness and toughness of the modified layers were measured using a micro-hardness tester, and dynamic repeating press equipment. The wear resistance in ambient air and the corrosive wear resistance in NaCl solution were evaluated using a ball-on-disk wear tester. The results show that W-Mo and W-Mo-N surface modified layers are composed of the alloying layers which vary in composition and phase form along the depth. A microhardness gradient was observed in the modified-surface layers. The surface hardness of the W-Mo-N and W-Mo modified layers was 25.3 and 14.2 GPa, which is seven-fold and 3.9-fold harder than the Ti6Al4V substrate, respectively. W-Mo and W-Mo-N surface-modified layers significantly improved the wear and corrosion resistance of Ti6Al4V. It seems that the wear resistance of W-Mo and W-Mo-N surface-modified layers in NaCl solution is better than that in ambient air owing to the strong lubricating effect of NaCl solution and the excellent corrosion resistance of the modified layers.

Multiple Needle Cathodes Plasma Surface Alloying of Ti6Al4V with W-Mo-C-N

2008 ◽  
Vol 373-374 ◽  
pp. 426-429
Author(s):  
Yue Fei Zhang ◽  
Xin Chao Bian ◽  
Qiang Chen ◽  
Guang Qiu Zhang ◽  
Yuan Gao
Keyword(s):  
Wear Resistance ◽  
Layer Structure ◽  
Surface Hardness ◽  
High Hardness ◽  
Surface Alloying ◽  
Cathode Plasma ◽  
Working Pressure ◽  
Plasma Surface ◽  
Pure Graphite ◽  
Plasma Surface Alloying

A multiple-needle-cathode plasma surface alloying process has been developed for improving the properties of surface hardness, wear resistance and corrosion resistance of Ti6Al4V. The process is carried out at temperatures below 800 °C and facilitates the simultaneous introduction of W, Mo,nitrogen and carbon into the surfaces of Ti6Al4V forming gradient alloying layer structure with an extremely high hardness. The process is performed at working pressure of 30Pa-80Pa with 9-needle-cathode of W80Mo20 alloy rods array and a high pure graphite plate cathode as target electrode. A maximum microhardness is 4-6 times much harder than the substrate. The results show the presence of carbide and nitride ceramics phases contribute to high microhardness and wear resistance. The multiple-needle-cathode discharge plasma treatment is an effective method for improvement of the mechanical and tribological properties of titanium-base alloys by formation of graded diffusion hard surface layers. The present paper describes this novel process and properties characteristics.

Study on wear resistance of TiN multi-permeation layer using glow plasma surface alloying

2007 ◽  
Vol 201 (9-11) ◽  
pp. 5302-5305 ◽  
Author(s):  
X.Y. Kui ◽  
J.Z. Wang ◽  
Y.P. Liu ◽  
J.Y. Xu ◽  
Y. Gao ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Glow Plasma ◽  
Plasma Surface Alloying

Microstructure and corrosion resistance of pure titanium surface modified by double-glow plasma surface alloying

2013 ◽  
Vol 49 ◽  
pp. 1042-1047 ◽  
Author(s):  
Qiong Wang ◽  
Ping-Ze Zhang ◽  
Dong-Bo Wei ◽  
Ruo-Nan Wang ◽  
Xiao-Hu Chen ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Surface ◽  
Pure Titanium ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Glow Plasma ◽  
Surface Modified ◽  
Plasma Surface Alloying

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

2015 ◽  
Vol 278 ◽  
pp. 92-98 ◽  
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

DOUBLE GLOW PLASMA SURFACE ALLOYING ANTIBACTERIAL SILVER COATING ON PURE TITANIUM

2014 ◽  
Vol 21 (03) ◽  
pp. 1450032 ◽  
Author(s):  
NAIMING LIN ◽  
JUNWEN GUO ◽  
RUIQIANG HANG ◽  
JIAOJUAN ZOU ◽  
BIN TANG
Keyword(s):  
Bacterial Adhesion ◽  
Antibacterial Property ◽  
Pure Titanium ◽  
Silver Coating ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Commercial Pure Titanium ◽  
Titanium Dental Implant ◽  
Glow Plasma ◽  
Plasma Surface Alloying

In order to endow the commercial pure titanium dental implant material with antibacterial property and aimed at avoiding the invalidation that is caused by bacterial adhesion on the surface, a silver coating was fabricated via double glow plasma surface alloying. The antibacterial property of the silver coating was assessed via in vitro estimation. The results showed that a continuous and compact coating was formed. The silver coating had absolute superiority in antibacterial property to raw commercial pure titanium. Double glow plasma surface alloying with silver on commercial pure titanium dental implant material could be considered as a potentially effective method for preventing bacterial adhesion.

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