Study of wear resistance of plasma coatings from a mixture of CuSn/CrxCy alloys

2021 ◽  
pp. 371-377
Author(s):  
A.E. Balanovsky ◽  
N.A. Astafeva ◽  
A.G. Tikhonov ◽  
Nguyen Van Trieu
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Cross Section ◽  
Chromium Carbide ◽  
Coating Layer ◽  
Plasma Heating ◽  
Tin Bronze ◽  
Alloyed Surface ◽  
Plasma Coatings ◽  
Wear Tests

There is studied the wear resistance of coatings obtained by plasma heating of the mixture based on tin-bronze and chromium carbide. Measurement of the microhardness of the cross-section of the coatings showed that the thickness of the coating layer strongly affects the formation of the alloyed surface layer, and the addition of chromium carbide strongly leads to stronger hardening. Wear tests have shown that alloying with bronze provides the ability to improve the surface of the steel, and the CuSn + CrxCy type coating has the highest wear resistance.

scholarly journals Study of the Formation of the Alloyed Surface Layer During Plasma Heating of Mixtures of Cu-Sn/CrXCY Alloys

2021 ◽  
Vol 43 (3) ◽  
pp. 386-396
Author(s):  
V.T. Nguyen ◽  
N.A. Astafeva ◽  
A.E. Balanovskiy
Keyword(s):  
Surface Layer ◽  
Plasma Heating ◽  
Alloyed Surface

scholarly journals The Abrasion Behaviour of X40CrMoV5-1 Steel Under Various Surface Treatments

2020 ◽  
Vol 3 (1) ◽  
pp. 50-54
Author(s):  
László Tóth ◽  
Tünde Kovács ◽  
Zoltán Nyikes ◽  
Mhatre Umesh
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Surface Layer ◽  
Surface Treatment ◽  
Surface Hardness ◽  
Surface Treatments ◽  
Plasma Nitridation ◽  
Pvd Coating ◽  
Abrasion Wear ◽  
Wear Tests

AbstractFor evolving a surface layer on the X40CrMoV5-1 steel, a plasma-nitridation and PVD coating process was applied. In our experiments, the samples were heat-treated (high-temperature hardening, annealed three times) and surface treatments (plasma-nitridation, PVD coating by TiAlN, duplex surface treating by plasma nitridation and after that, PVD coating TiAlN). After the heat treatments, we performed hardness tests and surface abrasion wear tests. The abrasion wear resistance of the specimens was studied in order to understand the heat treatment effects on abrasion behaviour. It was observed that the heat treatment and surface treatment process greatly influence the tool steel surface hardness and abrasion resistance behaviour. By plasma-nitridation the surface hardness doubled compared to the quenched surface hardness while the PVD coated TiAlN surface layer hardness is more than five times that of the hardened one. There was no relevant difference between the PVD coated (TiAlN) surface hardness and the duplex surface-treated hardness. On the basis of the results of the comparative abrasive wear tests, it can be concluded that the duplex surface treatment resulted in the greatest wear resistance..

Laser Composite Surfacing of a Magnesium Alloy with TiO2 Nanoparticles

2012 ◽  
Vol 549 ◽  
pp. 643-646 ◽  
Author(s):  
Min Zhang ◽  
Chang Jun Chen ◽  
Qun Xing Fei
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Electron Microscope ◽  
Magnesium Alloy ◽  
Scanning Electron Microscope ◽  
Cross Section ◽  
Composite Layer ◽  
Matrix Interface ◽  
Composite Surface ◽  
Scanning Electron

In the study, ZM5 Mg alloy was laser melted by dispersion of TiO2nanoparticles on its surface. The microstructure of the composite surfaced layer (both the top surface and the cross section) was characterized by optical and scanning electron microscope. A detailed analysis of the composition of the composite layer was carried out by energy dispersive spectroscopy. The microhardness of the composite layer was measured and the wear of the composite surfaced ZM5 was studied. Experimental results showed that composite surface layer consists of TiO2particles in grain refined ZM5 matrix, but the nanoparticles was agglomerated. And there was degradation of TiO2particles or interfacial reaction at the particle-matrix interface. Microhardness and wear resistance of the composite surfaced zone was improved compared to ZM5 substrate.

Wear Behavior and Structural Characterization of a Nitrogen Implanted Ti6Al4V Alloy at Different Temperatures

1983 ◽  
Vol 27 ◽  
Author(s):  
R. Martinella ◽  
G. Chevallard ◽  
C. Tosello
Keyword(s):  
Wear Resistance ◽  
Structural Characterization ◽  
Wear Behavior ◽  
Hardened Layer ◽  
Structural Modifications ◽  
Theory Comparison ◽  
Different Temperatures ◽  
Nitrogen Ions ◽  
Wear Tests

ABSTRACTMechanically polished Ti6Al4V samples were implanted with 100 key nitrogen ions to a fluence of 5.1017 ions/cm2 at two different bulk tenneratures: 370°C and 470°C. Wear tests were carried out with a reciprocating slidina tribotester. Structural modifications and wear morphologies were studied by TEM and SEM. 370°C implanted sample showed the same wear behavior as unimplanted ones, while 470°C implanted sample showed better wear resistance because of a TiN hardened layer. Correlations- between microstructural modifications, wear behavior and mechanisms are reported: results agree with the delamination theory. Comparison with ion- and gas-nitrided samples are presented.

Increasing Hardness of Surface Layer of Low-Carbon Steel by Account of Plasma Treatment of Coating Modification

2021 ◽  
Vol 316 ◽  
pp. 794-802
Author(s):  
Andrey E. Balanovsky ◽  
Van Trieu Nguyen
Keyword(s):  
Surface Layer ◽  
Thermal Treatment ◽  
Plasma Treatment ◽  
Plasma Heating ◽  
High Surface ◽  
Surface Hardness ◽  
High Hardness ◽  
Diffusion Region ◽  
Low Carbon ◽  
Wide Range

The Purpose of paper is to conduct studies to assess the possibility of increasing the hardness of the surface layer of steel St3 grade by plasma heating of the applied surface coating containing powder alloy PR-N80X13S2R. Mixtures of pasta were divided into 2 groups: for furnace chemical-thermal treatment and plasma surface melting. The study of the microstructure showed a difference in the depth of the saturated layer, depending on the processing method, during chemical-thermal treatment-1 mm, plasma fusion - 2 mm. The results of measuring the surface micro-hardness showed that, the obtained coating from a mixture of PR-N80X13S2R + Cr2O3 + NH4Cl has a uniform high surface hardness (31-64 HRC), from a mixture of only PR-N80X13S2R - the surface hardness varies in a wide range (15-60 HRC). The study of the microhardness of the cross section of the surface layer showed that, the diffusion region: from a mixture of powder PR-N80X13S2R + Cr2O3 + NH4Cl has uniform hardness (450-490 HV); from a mixture of PR-N80X13S2R - hardness increases in the depth of the molten region (from 300 to 600 HV), and sharply decreases in the heat affected zone (210-170 HV). The use of PR-N80X13S2R alloy powder as the main component in the composition of the paste deposited on the St3 surface during plasma treatment leads to the formation of a doped surface layer with high hardness.

scholarly journals Influence of nano-SiO2 on the bonding strength and wear resistance properties of polyurethane coating

2019 ◽  
Vol 26 (1) ◽  
pp. 77-83 ◽  
Author(s):  
Fangfang Wang ◽  
Lajun Feng ◽  
Huini Ma ◽  
Zhe Zhai ◽  
Zheng Liu
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Composite Coating ◽  
Network Structure ◽  
Bonding Strength ◽  
Coating Layer ◽  
Steel Substrate ◽  
Polyurethane Coating ◽  
Nano Sio2

Abstract To improve the wear resistance of polyurethane (PU) coating and its adhesion to the steel substrate, a series of simple and practicable techniques were designed to mix nano-SiO2 with PU powder to cast a coating layer onto the steel. When the addition of nano-SiO2 was small, a network structure of PU-SiO2 was produced. It improved the wear resistance of the composite coating and its adhesion to the steel substrate. When the addition of nano-SiO2 was excessive, agglomerated nano-SiO2 particles not only affected the bond between the PU resin and the steel substrate but also became abrasive materials, intensifying the abrasion of the composite coating during friction. It resulted in lower bonding strength and poorer wear resistance of the composite coating. The wear rate and friction coefficient of 2 wt.% SiO2/PU composite coating were 1.52×10−6 cm3/min N and 0.31, respectively. Its wear resistance was about 10 times as high as that of the pure PU coating. Furthermore, a simple and practicable installation was designed to test the bonding strength between the coating and the steel substrate. The bonding strength between 2 wt.% SiO2/PU composite coating and the steel substrate was 7.33 MPa, which was 39% higher than that of the pure PU coating.

scholarly journals About the mechanism for reducing the adhesion wear of the copper friction pair in the inert atmosphere by the nitrogen ions implantation method

2020 ◽  
pp. 72-79
Author(s):  
V.P. Sergeev ◽  
◽  
M.P. Kalashnikov ◽  
A.R. Sungatulin ◽  
O.V. Sergeev ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Friction Pair ◽  
High Energy ◽  
Inert Atmosphere ◽  
Solid Solution Hardening ◽  
Internal Stresses ◽  
Maximum Increase ◽  
Energy Beam ◽  
Nitrogen Ions

The mechanisms of increasing the resistance of copper samples treated with a high-energy beam of nitrogen ions to adhesive wear during friction together with a copper counterbody in an argon atmosphere are studied. It was shown that the increase in wear resistance is complex and is associated with the action of mechanisms such as solid-solution hardening, grinding of copper grains, precipitation of the finely dispersed CuN3 phase, increase in the density of dislocations and internal stresses of the second kind in the surface layer . The maximum increase in wear resistance and microhardness (~ 4 and ~ 2.6 times, respectively, compared with the original copper) is observed about ion fluence of ~ 9×1017 ion/cm2. A further increase in fluencies leads to a decrease in wear resistance and microhardness due to the enlargement of the pores formed in the surface layer of copper as a result of implantation of nitrogen ions.

Wear Characteristics of Low Temperature Degradation-Free Zirconia/Alumina Composites in a Point Contact Condition

2007 ◽  
Vol 342-343 ◽  
pp. 557-560
Author(s):  
Kwon Yong Lee ◽  
Hwan Kim ◽  
D.W. Kim ◽  
Dae Joon Kim ◽  
Myung Hyun Lee ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Low Temperature ◽  
Bovine Serum ◽  
Sliding Wear ◽  
Point Contact ◽  
Dry Sliding Wear ◽  
Sliding Motion ◽  
Alumina Composites ◽  
Pin On Disk ◽  
Wear Tests

The sliding wear of four different compositions of novel low temperature degradation-free zirconia/alumina (LTD-free Z/A) composites were characterized in a ceramicceramic point contact pair. The wear tests were performed by a pin-on-disk type wear tester in a linear reciprocal sliding motion with a point contact in both dry and bovine serum lubricated conditions at room temperature. For the dry sliding wear tests, AZ-2 (20 vol% (Y,Nb,Ce)-TZP/ 80 vol% Al2O3) showed the best wear resistance among four kinds of LTD-free Z/A composites. For the bovine serum lubricated sliding wear tests, wear was too little to be measured for all kinds of Z/A composites. These novel LTD-free Z/A composites having excellent wear resistance demonstrated a potential as the alternative materials for the ceramic- ceramic contact pairs of femoral head and acetabular liner in total hip replacement.

Improved Wear Resistance of AISI 304L by Cladding Boride Layers Using the GTAW Process

2014 ◽  
Vol 966-967 ◽  
pp. 386-396 ◽  
Author(s):  
Yuan Ching Lin ◽  
Jia Bin Bai ◽  
Jiun Nan Chen
Keyword(s):  
Wear Resistance ◽  
Energy Dispersive Spectrometer ◽  
Ceramic Powder ◽  
Surface Hardness ◽  
Industrial Applications ◽  
Aisi 304L ◽  
Hardness Tester ◽  
Cladding Layer ◽  
Gtaw Process ◽  
Wear Tests

The austenitic stainless steel (SS) of AISI 304L is widely used in industrial applications because of its superior anti-corrosion resistance. However, the material suffers from a lower hardness, thus reducing wear resistance. In this study, AISI 304L was clad with tungsten boride (WB) ceramic powder using the gas tungsten arc welding (GTAW) process to increase surface hardness and improve wear resistance. The microstructure of the cladding layer was investigated using an X-ray diffractometer (XRD), an electron probe microanalyzer (EPMA), and a scanning electron microscope (SEM) with an energy dispersive spectrometer (EDS). The hardness distribution of the cladding layer was measured using a micro-Vickers hardness tester. Wear tests were conducted with a pin-on-disc tribometer at the ambient condition, while simultaneously monitoring friction coefficient variation. Surface frictional temperature was recorded with K-type thermocouples during wear tests. The worn morphology of the tested specimens was observed by SEM to identify wear characteristics. The results show that WB cladding successfully increased the hardness and the wear resistance of AISI 304L. Keywords: GTAW, WB, wear resistance, microstructure

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