Production of TiNi Coating by Using Laser Reactive Spraying Method with Ti/Ni Composite Wire and Its Wear Resistance.

In this paper, 4Cr5MoSiV1 steel is dealt with by QPQ salt-bath nitriding at 520°C, 540°C, 560°C and for 2h、4h、6h, respectively. The treated surface microstructure was analyzed by using SEM. The depth of nitriding layer, scratch hardness and wear-resistance were tested for QPQ salt-bath nitriding technology. The corrosion resistance was tested in the 5%NaCl water by using spraying method. The experimental results indicate that with increasing the temperature and the nitriding time, the depth of nitriding layer, scratch hardness and wear-resistance of 4Cr5MoSiV1 steel were increased greatly. Comparing with the untreated specimen, its hardness enhances 196.73%, wear resistance enhances 349.65%, anti-corrosion enhances 943.10%. The die hardness, wear resistance and the corrosion resistance can be greatly improved by using the QPQ salt-bath nitriding technology.

Download Full-text

EVALUATION OF TRIBOLOGICAL PROPERTIES OF POWDER PAINT COATINGS USING THE BALL-CRATERING METHOD

Tribologia ◽

10.5604/01.3001.0013.7768 ◽

2019 ◽

Vol 288 (6) ◽

pp. 57-63

Author(s):

Jerzy Napiórkowski ◽

Krzysztof Ligier ◽

Magdalena Lemecha ◽

Damian Fabisiak

Keyword(s):

Wear Resistance ◽

Surface Layer ◽

Abrasive Wear ◽

Tribological Properties ◽

Abrasive Wear Resistance ◽

Electrostatic Spraying ◽

Resistance To Wear ◽

Paint Coatings ◽

The University ◽

Spraying Method

The basic method for protecting industrial products against the destructive impact of the environment is to protect them with paint coatings. One of the important characteristics of paint coatings is their resistance to abrasive wear. The study tested three coatings with different granulations obtained by the electrostatic spraying method and then polymerised. The tests were carried out in two ways. Some of them were conducted in accordance with the standards in place at the paint manufacturer’s laboratory, while the testing for abrasive wear resistance was conducted at a laboratory of the University of Warmia and Mazury in Olsztyn. The study involved measurements of thickness, gloss, scratching resistance, and wear using a rotational abrasion susceptibility tester and the ball-cratering method. Based on the obtained results, a different resistance to wear of particular coatings was found depending on the test stand. The study found the suitability of the ballcratering method for the assessment of wear resistance of thin paint coatings. The proposed methodology omits the problem of measuring very small changes in weight, while the obtained wear results are linked to other characteristics of the surface layer.

Download Full-text

Study on Wear Resistance of Plasma Sprayed Coating Remelted by Laser

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.373-374.392 ◽

2008 ◽

Vol 373-374 ◽

pp. 392-395

Author(s):

Y.J. Liu ◽

Y.S. Wang ◽

Xi Chen Yang

Keyword(s):

Wear Resistance ◽

Plasma Spraying ◽

Alloy Powder ◽

Laser Remelting ◽

Large Area ◽

Surface Appearance ◽

Organization Analysis ◽

Sprayed Coating ◽

Plasma Sprayed ◽

Spraying Method

In order to improve the wear resistance of the surface of thick copperplate, a coating of alloy powder is produced on the surface of the thick copperplate with the method of laser remelting plasma sprayed coating. The value simulation of temperature and the experimental results show that, it is difficult to produce ferronickel coating with large area and crackfree on thick copperplate for laser cladding technique. Using transsonic plasma heat spraying method to fix the alloy powder on the surface of thick copperplate, a sprayed coating can be produced, which has certain adhesion strength to the copperplate. In order to prevent crack produced in large area laser remelting coating, a method with band-like and point-like remilting area at intervals of same distance has been taken. The surface appearance and roughness of the coating produced by plasma spraying are compared with that of the coating produced by plasma spraying and remelted by laser, micro organization analysis and wear resistance comparison experiments are taken to the specimen. The microstructure photos show that the coating of the plasma heat sprayed is mainly made up by grains, with a great deal of pores existing. After laser remelting, microstructure of the coating is more compact, and the most of pores disappeared, so the strength of the boundary between the remelted coating and the copperplate is build up and the coating with large area and crackfree on thick copperplate is performed by the method of laser remelting plasma spraying coating in large amount of point-like remilting areas The experiment result shows that the wear resistance of laser remelting plasma heat sprayed coating enhances 3 times more than That of the unremelt coating, and about 14 times compared with the copperplate, and the wear resistance of the surface with point-like laser remelting area is between that of plasma heat sprayed coating and that of the laser remelting coating, it depends on the ratio of the remelted part to the whole in area, however, the wear resistance increases with the value of the ratio

Download Full-text

A superrobust superhydrophobic PSU composite coating with self-cleaning properties, wear resistance and corrosion resistance

RSC Advances ◽

10.1039/c5ra22396b ◽

2016 ◽

Vol 6 (13) ◽

pp. 10930-10937 ◽

Cited By ~ 9

Author(s):

Huaiyuan Wang ◽

Xiguang Zhang ◽

Zhanjian Liu ◽

Yixing Zhu ◽

Shiqi Wu ◽

...

Keyword(s):

Contact Angle ◽

Wear Resistance ◽

Corrosion Resistance ◽

Composite Coating ◽

Water Contact Angle ◽

Thermal Spraying ◽

High Water ◽

Water Contact ◽

Slide Angle ◽

Spraying Method

In this study, a superhydrophobic polysulfone (PSU) composite coating with a high water contact angle (WCA) of 159° and a low slide angle (SA) of only 3.5° has been fabricated through a simple thermal spraying method.

Download Full-text

A Fe-Based Amorphous Composite Coating on Al Plate by Electrothermal Explosion Spraying

Materials Science Forum ◽

10.4028/www.scientific.net/msf.688.389 ◽

2011 ◽

Vol 688 ◽

pp. 389-394 ◽

Cited By ~ 1

Author(s):

Yong Tian Wang ◽

Wei Qiang Hu ◽

Zong De Liu

Keyword(s):

Wear Resistance ◽

Composite Coating ◽

Thin Plate ◽

Composite Coatings ◽

Thermal Spraying ◽

Electrothermal Explosion ◽

Multiple Length Scales ◽

Materials Used ◽

Technical Industry ◽

Spraying Method

A Fe-based amorphous composite coating with different thickness on the Al thin plate is prepared by the electrothermal explosion spraying. Compared with other thermal spraying techniques, the electrothermal explosion spraying method can obtain a very high spraying velocity up to 4000m/s. The coating consists of the amorphous matrix and nanocrystal phases (α-Fe)，no laminar phenomenon is observed. The diffusion occurs between the substrate and the coating, showing a diffusion-metallurgical bond. The average hardness of coatings is 8 times larger than that of the Al substrate. The unique hierarchical microstructure at multiple length scales leads to the superior micro-hardness and wear resistance of the coating. The Fe-based composite coatings on Al thin plate have great potential as the promising lightweight wear-resistance structural materials used in the aero technical industry.

Download Full-text

Application of TEM to Deformation, Wear, and Fracture of Ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052377 ◽

1974 ◽

Vol 32 ◽

pp. 472-473

Author(s):

B. J. Hockey

Keyword(s):

Wear Resistance ◽

High Temperature ◽

Mechanical Behavior ◽

Brittle Materials ◽

High Temperature Strength ◽

Wide Range ◽

Corrosive Environments ◽

Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

Download Full-text

Dairy Farmers Empowerment in Subak Anggabaya Penatih Timur Denpasar Bali Indonesia

International Journal of Contemporary Research and Review ◽

10.15520/ijcrr/2018/9/05/510 ◽

2018 ◽

Vol 9 (05) ◽

pp. 20218-20223

Author(s):

I Ketut Arnawa ◽

I Wayan Runa ◽

I Made Sukerta ◽

Putu Sri Astuti ◽

Dan Luh Kadek Budi Martini

Keyword(s):

Rice Straw ◽

Azadirachta Indica ◽

Nutritional Value ◽

Organic Fertilizer ◽

Process Technology ◽

Dairy Farmers ◽

Training Activity ◽

Good Nutrition ◽

And Training ◽

Spraying Method

The main purpose for the application of science and technology for livestock group of cow, is to form a group of skilled and professional livestock, as vaccinators, can take advantage of Azadirachta indica leaves a plant insecticide, apply a good cage sanitation, can produce organic fertilizer from feces of cow, can treat hay as feed to good nutritional value. The method used is education and training. Activity results obtained, that 10 percent of members of the group have managed to become vaccinators cadres, able to implement good sanitation stables, feces of cow (Stomoxys calsitrans) can process technology with EM4 into organic fertilizer and can process the rice straw with urea spraying method, to produce feed hay to the value of good nutrition for growing cattle.

Download Full-text

Abrasive wear of polymer/steel gear drives

Progress in Agricultural Engineering Sciences ◽

10.1556/progress.4.2008.1 ◽

2008 ◽

Vol 4 (1) ◽

pp. 1-26

Author(s):

Gábor Kalácska

Keyword(s):

Wear Resistance ◽

Abrasive Wear ◽

Material Selection ◽

Solid Particles ◽

Soil Types ◽

General View ◽

Modern Engineering ◽

Clean Environment ◽

Engineering Polymers ◽

Plastic Gears

Research was performed on the friction, wear and efficiency of plastic gears made of modern engineering polymers and their composites both in a clean environment (adhesive sliding surfaces) and in an environment contaminated with solid particles and dust (abrasive), with no lubrication at all. The purpose is to give a general view about the results of abrasive wear tests including seven soil types as abrasive media. At the first stage of the research silicious sand was applied between the meshing gears and the wear of plastic and steel gears was evaluated and analyzed from the point of different material properties (elongation at break, hardness, yield stress, modulus of elasticity) and its combinations. The different correlations between the experienced wear and material features are also introduced. At the second stage of the project the abrasive sand was replaced with different physical soil types. The abrasive wear of gears is plotted in the function of soil types. The results highlight on the considerable role of physical soil types on abrasive wear resistance and the conclusions contain the detailed wear resistance. The results offer a new tribology database for the operation and maintenance of agricultural machines with the opportunity of a better material selection according to the dominant soil type. This can finally result longer lifetime and higher reliability of wearing plastic/steel parts.

Download Full-text