Effects of Remelting on Fatigue Wear Performance of Coating

2020 ◽  
pp. 37-43
Author(s):  
Zhiping Zhao ◽  
Xinyong Li ◽  
Chao Wang ◽  
Yang Ge
Keyword(s):  
Fatigue Wear ◽  
Wear Performance

Influence of Particle Size of Wheat Powder on Roller Wear Properties

2015 ◽  
Vol 1120-1121 ◽  
pp. 1316-1319
Author(s):  
Liang Peng Jiang ◽  
Ke Ping Zhang ◽  
Jun Min Ma
Keyword(s):  
Weight Loss ◽  
Particle Size ◽  
Wear Behavior ◽  
Low Cycle Fatigue ◽  
Milling Process ◽  
Wear Properties ◽  
Fatigue Wear ◽  
Wear Performance ◽  
Powder Particles ◽  
Three Body

Wheat milling process involves multiple grinding procedures, the wheat powder particles size in different grinding procedure are difference. In order to study the influence of particle size of wheat powder on roller wear performance in different grinding procedure, abrasion experiments were carried out by MLS-225 three-body abrasive wear tester, while different sizes were chosen as abrasive, alloy white iron which frequently used as roller metal materials was chosen as wear sample, wear weight loss and surface microstructure were chosen as the main evaluation indicators. The results showed that the weight loss of samples were showed a linear relationship with wheat the size of wheat powder. The main wear behavior was mainly mechanical polishing while particle sizes was smaller one. For the larger size, wear was made by multiple plastic deformation and low cycle fatigue wear mechanism.

Wear Performance of GCr15 Friction Pairs with Effect of Initial Radial Micro-Grooves

2019 ◽  
Vol 11 (1) ◽  
pp. 56-61
Author(s):  
Wei Yuan ◽  
Shengkai Mei ◽  
Song Li ◽  
Zhiwen Wang ◽  
Jie Yu ◽  
...  
Keyword(s):  
Wear Rate ◽  
Abrasive Wear ◽  
Electrical Discharge Machining ◽  
Friction Pair ◽  
Wear Volume ◽  
Fatigue Wear ◽  
Wear Performance ◽  
Wear Process ◽  
Groove Test ◽  
On Line

Background: Grooves may inevitably occur on the surface of the friction pair caused by severe wear or residual stress, which will play an important role on the reliability of machine parts during operation. Objective: The effect of the micro-grooves perpendicular to sliding direction on the wear performance of the friction pairs should be studied. Method: Micro-grooves can be machined on discs of friction pairs using electrical discharge machining. On-line visual ferrograph method was used to monitor the wear process to research the wear rate changing characteristic. Profilemeter and metallurgical microscope were used to observe the wear scars. Results: Comparing to the non-groove test, i) in one-groove test, wear volume and rate were approximate the same, and the wear scar was smooth, ii) when the grooves more than 4, the test running-in stage will be obviously prolonged, particularly for the test with 8 grooves on the disc, the duration of running-in stage is 4 times than that without grooves on specimen, and the wear rate and volume increase significantly, and then decrease with fluctuation, iii) the abrasive wear can be avoid with the debris stagnating in the groove, however, fatigue wear will significantly emerge. Conclusion: Abrasive wear can be avoided and smooth running-in surfaces can be obtained with proper amount of initial radial micro-grooves.

Corrosive wear and electrochemical corrosion performances of arc sprayed Al coating in 3.5% NaCl solution

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Peng Li ◽  
Xiya Huang ◽  
Dejun Kong
Keyword(s):  
Abrasive Wear ◽  
Wear Mechanism ◽  
Electrochemical Corrosion ◽  
Corrosive Wear ◽  
Corrosion Mechanism ◽  
Nacl Solution ◽  
Fatigue Wear ◽  
Wear Performance ◽  
Content Type ◽  
Al Coating

Purpose The purpose of this paper is to investigate the effects of load and speed on the corrosive wear performance of Al coating in 3.5% NaCl solution, which provided an experimental reference for the anti-corrosion engineering on offshore platforms. Design/methodology/approach A layer of Al coating was prepared on S355 steel using an arc spraying. The corrosive wear test was carried out with CFT–1 type surface property tester. The effects of load and speed on the corrosive wear performance of Al coating were investigated and the wear mechanism was also discussed. The electrochemical tests were conducted using a CHI660E type electrochemical workstation, the anti-corrosion mechanism was analyzed. Findings The average coefficient of frictions (COFs) of Al coating under loads of 1.5, 2.5 and 3.5 N are 0.745, 0.847 and 0.423, the wear mechanism is abrasive wear. The average COFs of Al coating at the speeds of 200, 400 and 600 rpm are 0.745, 0.878 and 0.617, respectively, the wear mechanism at the speeds of 200 and 400 rpm are abrasive wear, while that at the speed of 600 rpm is abrasive wear and fatigue wear. The anti-corrosion mechanism is the isolation of Cl– corrosion and cathodic protection of sacrificial anode. Originality/value This paper mainly studied corrosive wear and electrochemical corrosion performances of Al coating. This study hereby confirms that this manuscript is the original work and has not been published nor has it been submitted simultaneously elsewhere. This paper further confirms that all authors have checked the manuscript and have agreed to the submission.

Study on Friction and Wear Performance of Plasma-Sprayed Metal Oxide Ceramic Coatings

2013 ◽  
Vol 312 ◽  
pp. 415-420
Author(s):  
Zi Yuan Shi ◽  
Guang Li ◽  
Ji Fei Cai
Keyword(s):  
Metal Oxide ◽  
Friction And Wear ◽  
Composite Coatings ◽  
Wear Test ◽  
Ceramic Coatings ◽  
Oxide Ceramic ◽  
Fatigue Wear ◽  
Wear Performance ◽  
Oxide Ceramic Coatings ◽  
Plasma Sprayed

Paper transferring gripper is a key part of printer. In this work, plasma spray technology was adopted for the coating of 5 different metal oxide ceramic layers on metallic substrate. The friction and wear performance of different plasma-sprayed metal oxide ceramic coating on the gripper surface were comparatively studied by friction and wear test. Results suggested that compared to 100% Al2O3 and 100% Cr2O3 ceramic coatings, Al2O3/Cr2O3 composite coatings had a higher friction coefficient and wear amount. Abrasive wear was the dominant wear mechanism for Al2O3/Cr2O3 composite coatings, while fatigue wear was dominant for 100% Al2O3 and 100%Cr2O3 ceramic coatings.

scholarly journals Laser Cladding of Ti-Based Ceramic Coatings on Ti6Al4V Alloy: Effects of CeO2 Nanoparticles Additive on Wear Performance

Coatings ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 109 ◽  
Author(s):  
Haojun Wang ◽  
Tao Chen ◽  
Weilong Cong ◽  
Defu Liu
Keyword(s):  
Abrasive Wear ◽  
Laser Cladding ◽  
Wear Mechanisms ◽  
Adhesive Wear ◽  
Ceramic Coatings ◽  
Ceo2 Nanoparticles ◽  
Ti6al4v Alloy ◽  
Fatigue Wear ◽  
Wear Performance ◽  
Worn Surface

Ti-based ceramic coatings on Ti6Al4V substrates were successfully prepared through a laser cladding process using pre-placed starting materials of TiCN + SiO2 mixed powder without or with adding a 3 wt % CeO2 nanoparticles additive, aiming at improving the wear resistance of the Ti6Al4V alloy for biological applications. The effects of the CeO2 nanoparticles additive on the microstructure, microhardness, and wear performance of the coatings were analyzed in detail. The observations showed that the main compositions of the cladding coating were TiCN and TiN phase. Compared to the coatings without CeO2, the coatings modified with CeO2 nanoparticles led to more excellent mechanical properties. The average microhardness of the coatings modified with CeO2 nanoparticles was approximately 1230 HV0.2, and the wear volume loss of the coatings modified with CeO2 nanoparticles was approximately 14% less than that of the coatings without CeO2 under a simulated body fluid (SBF) lubrication environment. The major reasons included that the microstructure of the coatings modified with CeO2 nanoparticles was refined and compact granular crystalline. The wear mechanisms of the coatings were investigated from the worn surface of the coatings, wear debris, and the worn surface of the counter-body balls. The wear mechanisms of the coatings without CeO2 included abrasive wear, adhesive wear, and fatigue wear, while the wear mechanisms of the coatings modified with CeO2 nanoparticles included only abrasive wear and adhesive wear, because the fine microstructure of the coatings had an excellent resistance to fatigue wear.

SURFACE-INTERFACE MICROSTRUCTURES AND HIGH-TEMPERATURE WEAR PERFORMANCE OF HVOF-SPRAYED AND LASER-REMELTED NiCrBSi ALLOY COATINGS

2016 ◽  
Vol 24 (05) ◽  
pp. 1750057 ◽  
Author(s):  
DEJUN KONG ◽  
BENGUO ZHAO
Keyword(s):  
High Temperature ◽  
Wear Mechanism ◽  
Adhesive Wear ◽  
Chemical Elements ◽  
Early Stage ◽  
Fatigue Wear ◽  
Wear Performance ◽  
High Temperature Wear ◽  
The Coefficient Of Friction ◽  
Nicrbsi Coating

A high-velocity oxygen fuel (HVOF)-sprayed NiCrBSi coating on H13 hot work die steel was processed with laser remelting; and the surface-interface morphologies, concentrations of chemical elements, and phases of the coating were analyzed with scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD), respectively. The friction-wear behaviors of the coating at high temperatures were investigated by the means of ball/plane contact. The effects of high temperature on the coefficient of friction (COF) and wear performance are discussed. The results show that the coating is dense and tightly bonded to the substrate at the interface. The average COFs at 500[Formula: see text]C, 600[Formula: see text]C, and 700[Formula: see text]C are 0.3749, 0.3609, and 0.4556, respectively. The wear mechanism is slight adhesive wear at 500[Formula: see text]C, and primarily oxidative wear and fatigue wear at 600[Formula: see text]C. The wear mechanism at 700[Formula: see text]C is oxidized wear and fatigue wear in the early stage, and mainly adhesive wear in the later stage. During high-temperature wear, an oxide film is formed on the coating surface, decreasing the wear resistance of the coating, which is primarily dependent on the compounds of Ni, Cr, B, Si, and C and the oxides of Si.

scholarly journals Friction and Wear Performance of CoCrFeMnNiW Medium-Entropy Alloy Coatings by Plasma-Arc Surfacing Welding on Q235 Steel

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 715
Author(s):  
Qingxian Hu ◽  
Xiaoli Wang ◽  
Junyan Miao ◽  
Fanglian Fu ◽  
Xinwang Shen
Keyword(s):  
Fusion Zone ◽  
Wear Mechanism ◽  
Indentation Test ◽  
Alloy Coating ◽  
Optical Microscope ◽  
Fatigue Wear ◽  
Wear Performance ◽  
Near Surface ◽  
Hardness Tester ◽  
Layer Coating

In this study, CoCrFeMnNiW medium-entropy alloy coating on Q235 was fabricated by plasma surfacing technology. The wear performance of the prepared one-layer coating and the two-layer coating was studied by a friction and abrasion tester. The microstructure and performance of the CoCrFeMnNiW coating were researched by optical microscope, a nano-indentation test, SEM, and hardness tester. The results show that the microstructure of the coating is made up of a fusion zone, equiaxed dendrites near the fusion zone, coarse columnar crystals, and near-surface with a certain direction between the near-fusion zone and near-surface fine equiaxed grains. The wear mechanism of one layer coating was abrasive with wear and fatigue wear. The wear mechanism of the two-layer coating was adhesive with wear and fatigue wear. For CoCrFeMnNiW MEA coating, the main factors determining their wear resistance were the value of its depth recovery ratio (ηh) and EIT.

Comparative analysis of the wear performance of spindle hook teeth during field work

2021 ◽  
pp. 1-33
Author(s):  
Yanqing Gu ◽  
Hongwen Zhang ◽  
Xiuqing Fu ◽  
Lei Wang ◽  
Jun Wang ◽  
...  
Keyword(s):  
Abrasive Wear ◽  
Phase Structure ◽  
Field Work ◽  
Fatigue Wear ◽  
Wear Area ◽  
Wear Performance ◽  
Operation Conditions ◽  
Field Operation ◽  
Hole Defects ◽  
Continuous Field

Abstract The wear performance of the spindle hook teeth during field work was compared, and the causes of the wear failure of the spindle hook teeth were analyzed. Samples of three kinds of spindle were obtained from the fixed installation position under continuous field operation conditions. The hardness, phase structure, elemental composition, and micromorphology of the spindle hook teeth were characterized using microhardness, X-ray diffractometer (XRD), energy spectrum analyzer (EDS), and scanning electron microscope (SEM) after cutting of the spindles. Results show that the coating hardness and element penetration zone of No.3 spindle hook tooth are the largest, and the surface coating phase structure of the three kinds of spindle is mainly a body-centered cubic structure of Cr (211). Micro-crack and hole defects exist in the coating of all three kinds of spindle. The thicknesses of the coating of No.1, No.2, and No.3 spindles are 74, 100, and 130 μm, respectively. During the field operation, the wear of the spindle hook tooth coating is caused by abrasive wear and fatigue wear, while the wear of the substrate is the result of the combined effect of abrasive wear and oxidation wear. Extracting the wear area and width of spindle hook teeth shows that the wear area of all three kinds of spindle hook teeth increases exponentially and the wear width changes linearly with the increase in field operation area.

Tribological Performance of AlN Nanoparticles as Lubricating Oil Additive

2011 ◽  
Vol 366 ◽  
pp. 238-242
Author(s):  
Heng Wang ◽  
Yu Min Wang
Keyword(s):  
Tribological Performance ◽  
Lubricating Oil ◽  
Test Machine ◽  
Extreme Pressure ◽  
Fatigue Wear ◽  
Wear Performance ◽  
Base Oil ◽  
Long Time ◽  
Lubricating Oil Additive ◽  
Worn Surface

By using Four-ball test machine, the anti-wear and extreme pressure performance of the lubricating oil that contain the ceramics nanoparticles additives were investigated. With the help of scanning electron microscopy (SEM), the worn surface is observed, and its tribological performance is studied. The experimental results show that nanoparticles additives can effectively improve extreme pressure and anti-wear performance of the lubricating oil, and the optimal concentration of it in the base oil is 3 wt%. With ZDDP additive contrast experiment show that under low-load and long time conditions, ZDDP additive is far inferior to nanoparticles additives, and containing AlN nanoparticles additives lubricating oil mainly happen Fatigue wear and scratch.

Abrasive fatigue wear rubber lining in the context of fractal analysis

2019 ◽  
pp. 103-110
Author(s):  
A.S. Kobets ◽  
◽  
V.I. Dyrda ◽  
Ye.V. Kalhankov ◽  
I.M. Tsanidi ◽  
...  
Keyword(s):  
Fractal Analysis ◽  
Fatigue Wear ◽  
Rubber Lining
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