scholarly journals Special issue/Wear resistance coating. Preparation of wear resistant coatings by composite deposites.

1990 ◽  
Vol 41 (11) ◽  
pp. 1094-1100 ◽  
Author(s):  
Kazuyoshi KUROSAWA
Keyword(s):  
Wear Resistance ◽  
Special Issue ◽  
Wear Resistant ◽  
Wear Resistant Coatings

The Effects of Feedstock Powder and Deposition Technique on the Hardness and Tribological Performance of Thermal-Sprayed WC-Co Coatings

2015 ◽  
pp. 1-24
Author(s):  
Traugott E. Fischer ◽  
Yunfei Qiao ◽  
YouRong Liu
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
High Velocity ◽  
Abrasion Resistance ◽  
Steel Substrate ◽  
Tribological Performance ◽  
Deposition Technique ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
The Difference

The wear resistance of thirty WC-Co coatings, deposited by standard High-Velocity Oxyfuel (HVOF) techniques and a high-temperature variant of HVOF, with standard commercial and experimental nanostructured feedstocks, is examined. It is found that the high-temperature gun produces harder and more wear-resistant coatings than the standard gun. The latter does not generate high enough temperatures to melt the powder and provide good bonding between WC grains and Co binder. All coatings present higher wear resistance than the steel substrate. Coatings deposited with standard feedstock possess generally higher wear resistance than nanostructured coatings. The difference is more pronounced in sliding than in abrasive wear. WC-Co Coatings deposited with nanostructured feedstocks are recommended for use in bearings and other machinery with sliding parts because they inflict much less wear on the material on which they slide than conventional coatings. Coatings with micrometer WC grains are recommended for abrasion resistance applications such as earth moving or slurry processing machinery.

scholarly journals Durability of working bodies of soil-cultivating machines strengthened by composite electrolytic coatings (CEC)

2021 ◽  
Vol 100 (2) ◽  
pp. 41-49
Author(s):  
M. Stechyshyn ◽  
A. Kornienko ◽  
N. Stechyshyna ◽  
A. Martynyuk ◽  
M. Tsepeniuk ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Particle Size ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Nickel Matrix ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Optimal Ratio ◽  
Working Bodies ◽  
Volumetric Content

The task of this work is to find the optimal ratio between the size of the particles of silicon carbide and their volumetric content in the nickel matrix to provide maximum characteristics of strength and wear resistance of the working bodies of soil-processing machines. The article investigates the processes of forming complex electrolytic coatings (CEC) on a nickel basis with particles of the filler of various sizes of silicon carbide (SIC). It has been established that the formation of a sicle size sicle and SiC5 is carried out on a vertical, and all other particles in a horizontal cathode. The volumetric content of SICnano and SiC5 particles in nickel reaches a maximum of about 10%, and SiC100 – 46 %. Cap with particle size 28/20 and 50/40 μm allow you to get the most wear-resistant coatings. In this case, the coating with particles 28/20 μm have higher wear resistance, but coating with particles 50/40 μm are more technological when they are formed. The size of the filler particles has a significant effect on the tribological characteristics of the CEP, namely wear resistance and friction coefficient. It has been established that the highest wear resistance and the smallest friction coefficients are characterized by coatings having as a filler of fractions 28/20 and 50/40 μm. Tribological studies show the promise and efficiency of the CEP to increase the wear resistance of the working bodies of soil-cultivating machines.

Study on the Microstructure and Properties of Iron-Based Wear-Resistant Coating on the Inner Wall of an Aluminium Cylinder Block

2016 ◽  
Vol 703 ◽  
pp. 119-122
Author(s):  
Zeng Rong Li ◽  
De Yuan Li ◽  
He Huang ◽  
Bi Wu
Keyword(s):  
Wear Resistance ◽  
Coating Layer ◽  
Substrate Surface ◽  
Optical Microscope ◽  
Cylinder Block ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Arc Spray ◽  
Iron Based ◽  
Xrd Patterns

An arc spray gun with inner holes was used to spray two typical iron-based wear-resistant coatings, 08A and 08CrMoVA, on the inner wall of an aluminum cylinder block for an engine. In addition, microstructures of the coatings were observed through an optical microscope and a scanning electron microscope. Then, X-ray diffraction (XRD) patterns were employed to analyze the types of oxides in the coatings, and a quantitative metallographic analyzer was applied to test the porosity and the amount of oxides in the coatings. Afterwards, the coatings were immersed in the oil to conduct the wearing test and the test result showed that the coatings had better wear resistance, compared with the gray cast iron. Besides, it was further found that the coatings were formed on the substrate surface by the accumulation of flat particles, and unmelted particles, oxides, pores and fissures were also found in the coating layer. While being lubricated by oil, FeO in the coatings and the oil stored in pores decreased the friction coefficient and thus increased the wear resistance of the coating layer.

scholarly journals Composite Metal-Matrix Alloys Based on Ni-Al for Obtaining Wear-Resistant Coatings by Electric Spark Deposition

2021 ◽  
Vol 346 ◽  
pp. 02004
Author(s):  
S.N. Khimukhin ◽  
S.V. Nikolenko ◽  
L.A. Konevtsov ◽  
E.D. Kim
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Liquid Phase ◽  
Metal Matrix ◽  
Temperature Synthesis ◽  
Complex Composition ◽  
Wear Resistant ◽  
Research Results ◽  
Wear Resistant Coatings ◽  
High Temperature Synthesis

The paper presents the research results on produsing by the method of liquid-phase self-propagating high-temperature synthesis (SHS) the composite metal-matrix alloys intended for the obtaining of wear-resistant coatings by electric spark deposition (ESD). Oxides NiO, Cr2O3 and mineral concentrate ZrO2 were used as a melting charge. Alloys based on the Ni-Al system with aluminides of complex composition containing Cr and Zr were obtained by means of the alumothermic SHS reaction. Wear-resistant coatings were formed on steel 45 by the ESD method by means of the newly obtained alloys,. The maximum wear resistance of the coatings was obtained using the alloys containing Cr (wt% 18) and Zr (wt% 1.9).

scholarly journals Increasing the efficiency processing of heat-resistant steels in conditions of continuous turning

2020 ◽  
Vol 107 (3) ◽  
pp. 113-120
Author(s):  
O. Lymar’ ◽  
Keyword(s):  
Wear Resistance ◽  
Cutting Tool ◽  
Wear Resistant ◽  
Corrosion Resistant ◽  
Wear Resistant Coatings ◽  
Heat Resistant ◽  
Factors Influencing ◽  
Cutter Wear ◽  
Heat Resistant Steels

Increasing the efficiency processing of heat-resistant steels in conditions of continuous turning he work is devoted to the study of factors influencing the resistance characteristics of the cutting tool in the conditions of turning heat-resistant corrosion-resistant steels. Methods for increasing the wear resistance of the cutter with replaceable pentagonal non-sharpening plates are considered. The nature of replaceable polyhedral plates wear and the reasons of destruction of cutting parts of the cutter in the conditions of continuous turning with wear-resistant coverings are analyzed. Keywords: cutting tool, pentagonal plates, lubricating and cooling liquids, stability characteristics, wear resistance of the cutter, wear-resistant coatings, hard-to-process materials.

Composite Fe/TiC Powders for Wear Resistance Coatings Using Plasma Spray Process

1997 ◽  
Author(s):  
P. Vitiaz ◽  
T. Azarova ◽  
T. Talako ◽  
A. Ilyuschenko ◽  
S. Steinhauser ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Plasma Spraying ◽  
Plasma Spray ◽  
Coating Properties ◽  
Iron Matrix ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Spray Process ◽  
Plasma Spray Process ◽  
Wear Resistance Coatings

Abstract This work evaluates the potential of using new competitive powders of Fe/TiC system for plasma spraying of wear resistant coatings. To improve coating properties, Cr and Ni were added to the iron matrix. The results of complex investigations of plasma coatings from such materials are presented.

scholarly journals HVOF Sprayed Fe-Based Wear-Resistant Coatings with Carbide Reinforcement, Synthesized In Situ and by Mechanically Activated Synthesis

Coatings ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1092
Author(s):  
Dmytro Tkachivskyi ◽  
Kristjan Juhani ◽  
Andrei Surženkov ◽  
Priit Kulu ◽  
Tomáš Tesař ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Composite Coatings ◽  
Thermal Spraying ◽  
Steel Matrix ◽  
X Ray Diffraction ◽  
Hvof Spraying ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Two Phases

The aims of this study were: (1) to produce composite coatings by high velocity oxy fuel (HVOF) spraying with steel matrix reinforced by cermets (a) Cr3C2–20%Ni and (b) TiC–20%NiMo, manufactured by mechanically activated synthesis (MAS); (2) to synthesize in situ a carbide reinforcement for iron matrix from a mixture of titanium and carbon during HVOF reactive thermal spraying (RTS); (3) to compare the wear resistance of produced coatings. As a reference, HVOF sprayed coatings from commercial Cr3C2–25%NiCr (Amperit 588.074) and AISI 316L were utilized. Study of microstructure revealed the inhomogeneity of the Cr-based MAS coating; the Ti-based MAS coating had typical carbide granular structure, and the Ti-based RTS coating possessed elongated structures of TiC. The X-ray diffraction revealed two main phases in the Cr-based MAS coating: Cr3C2 and austenite, and two phases in the Ti-based coatings: TiC and austenite. Among the studied coatings, the Cr-based MAS coating demonstrated the highest low-force hardness (490 HV0.3). During the abrasive rubber wheel test (ASTM G65), the Ti-based MAS coating showed the best wear resistance, followed by Cr3C2–25%NiCr and Ti-based RTS coating. In the abrasive–erosive test (GOST 23.201-78), the Ti-based MAS coating was 44% better than Cr3C2–25%NiCr coating. The Ti-based RTS coating was 11% more wear resistant than the reference Cr3C2–25%NiCr coating.

SWEBOR 400

Alloy Digest ◽  
2014 ◽  
Vol 63 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Tensile Properties ◽  
High Strength Steel ◽  
High Strength ◽  
Bend Strength ◽  
Great Strength ◽  
Wear Resistant

Abstract Swebor 400 (hardness 400 HBW) is a high-strength steel with good wear resistant qualities. This alloy is used to endure conditions of extra-heavy wear and when great strength and good weldability is required. This datasheet provides information on composition, hardness, tensile properties, and bend strength as well as fracture toughness. It also includes information on wear resistance as well as forming, machining, and joining. Filing Code: CS-181. Producer or source: Swebor Stål Svenska AB.

RUUKKI RAEX 300

Alloy Digest ◽  
2012 ◽  
Vol 61 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Shear Strength ◽  
Impact Toughness ◽  
Yield Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Structural Components ◽  
Wear Resistant

Abstract RUUKKI RAEX 300 (typical yield strength 900 MPa) is part of the Raex family of high-strength and wear-resistant steels with favorable hardness and impact toughness to extend life and decrease wear in structural components. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on wear resistance as well as forming, machining, and joining. Filing Code: SA-643. Producer or source: Rautaruukki Corporation.

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