Wear Resistance of Experimental Hard Alloys Grades with Co-Mo-Ti Binders upon Conditions of Friction without Lubricant on Stainless Steel

2021 ◽  
Vol 1037 ◽  
pp. 522-527
Author(s):  
Evgeny V. Fominov ◽  
Maxim S. Egorov ◽  
Denis V. Moiseev ◽  
E. Dieudonne ◽  
Constantine G. Shuchev
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Normal Load ◽  
Wear Intensity ◽  
Partial Substitution ◽  
Hard Alloys ◽  
Adhesive Interaction ◽  
Volume Wear ◽  
Shielding Properties ◽  
Pin On Disk

The results of studies of wear resistance and tribological properties of experimental single carbide hard alloys grades with modified Co-Mo-Ti binders upon conditions of friction without lubricant on stainless steel are presented. All the data obtained were compared with similar parameters for the basic alloy VK8 (Co-Mo), on the basis of which the experimental grades were developed. Tribological tests were performed on tribometer which implemented a scheme of friction "pin on disk" at constant sliding speed and normal load values with artificially heated tribo contact zone. Studies have found that partial substitution of cobalt in a binder by Mo and Ti has led to a decrease in average friction rates. It was established that the greatest wear resistance and the best tribological characteristics were obtained for specimens of experimental grade 2.22 (5,65%Co+1,8%Mo+0,6%Ti). The process of friction for this pin material was characterized by the formation of secondary structures with high shielding properties, reducing of the adhesive interaction of materials, low volume wear intensity, minimal friction coefficient, as well as the least roughness of friction tracks on the counter body (disk). An increase in the proportion of molybdenum in the binder of more than 5% reduced the wear resistance of the experimental grades in comparison with the basic alloy VK8.

scholarly journals Abrasive wear resistance of selected woods

2017 ◽  
Vol 63 (No. 2) ◽  
pp. 91-97
Author(s):  
Brožek Milan
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Sweet Cherry ◽  
Sour Cherry ◽  
Wear Intensity ◽  
Horse Chestnut ◽  
Silver Fir ◽  
Abrasive Particles ◽  
Volume Weight ◽  
Pin On Disk

In this contribution, the results of the wear resistance study of 10 sorts of wood (apple, aspen, beech, hornbeam, horse-chestnut, London plane, mahogany, silver fir, sour cherry and sweet cherry) are published. The laboratory tests were carried out using the pin-on-disk machine when the abrasive clothes of three different grits (240, 120 and 60) were used. The wear intensity was assessed by the volume, weight and length losses of the tested samples. From the results of the carried out tests it follows that the wear resistance of different woods is different. It was proved that the wear resistance of different woods depends on the abrasive particles size, too. Also the technical-economical evaluation was part of the carried out tests. It was univocally proved that at the intensive abrasive wear using the abrasive cloth the best results were shown by hard woods, e.g. apple, beech or mahogany. Soft woods, e.g. horse-chestnut, silver fir or sweet cherry, are cheap, but their wear is bigger compared to hard woods.

Mechanical and Corrosion Behavior of TiN Coatings Deposited on Nitrided AISI 420 Stainless Steel

2019 ◽  
Vol 813 ◽  
pp. 135-140
Author(s):  
Eugenia Laura Dalibon ◽  
Amado Cabo ◽  
Jorge Halabi ◽  
Ramiro D. Moreira ◽  
Kevin Silva ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Corrosion Behavior ◽  
Nitrided Layer ◽  
Salt Spray ◽  
High Hardness ◽  
Wear Loss ◽  
Tin Coating ◽  
Tin Coatings ◽  
Pin On Disk

TiN coatings are widely used in different applications for extending the lifetime of components due to their high hardness and good wear resistance. However, it is not convenient to deposit them on soft stainless steels. In this work, the wear and corrosion behavior of commercial TiN coatings deposited by Arc-PVD on nitrided and non-nitrided martensitic stainless steel was studied. Two different nitriding conditions were used, one at high temperature (HTN) and the other at low temperature (LTN). Nanohardness and microhardness were measured. The microstructure was characterized by OM, SEM, XRD and XPS. Pin on disk and erosion tests were carried out in order to evaluate their wear resistance. The corrosion behavior was analyzed in salt spray fog and electrochemical tests in NaCl solution and the adhesion was measured in Scratch and Rockwell C Indentation tests.The coating thickness was about 1.5 µm and its hardness of 34 GPa. The nitrided layers were 13 µm and 17 µm thick for LTN and HTN, the hardness was approximately 12 GPa for both nitrided samples. The nitrided layer improved TiN coating adhesion in the Scratch tests. The wear loss volume was similar for both duplex and only coated samples in pin on disk tests. Nevertheless, wear resistance was not good for the LTN or HTN + TiN coating system in the erosion tests. Regarding corrosion behavior, the coatings showed poor corrosion resistance and this could be related to the presence of porous defects, which allow the solution to reach and attack the substrate, thus producing coating detachment around the pits.

Wear of Dry Sliding Al 6061-T6 Alloy Under Different Loading Conditions

2022 ◽  
Vol 10 (1) ◽  
pp. 1-12
Author(s):  
Srinivasula Reddy I. ◽  
Vadivuchezhian Kaliveeran
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Wear Mechanisms ◽  
Room Temperature ◽  
Normal Load ◽  
Microscopic Analysis ◽  
Dry Sliding ◽  
Al 6061 ◽  
Contact Surfaces ◽  
Pin On Disk

In the present work, wear of Al 6061-T6 alloy under different normal loads, sliding speeds and temperatures was investigated. Pin on disk type tribometer was used to conduct dry sliding experiments. Different load combinations comprising of normal loads (1 kg, 1.5 kg and 2 kg), sliding speeds (1.25 m/s, 2 m/s and 3 m/s) and temperatures (room temperature (31 ± 1 °C), 60 °C, 100 °C and 150 °C) were applied during dry sliding experiments. Adhesive and abrasive wear mechanisms were observed in dry sliding of Al 6061-T6 alloy contacts from the microscopic analysis of worn contact surfaces. The wear rate was more influenced by increase in normal load than increase in sliding speed and temperature. Under normal loads of 1 kg and 1.5 kg, Al 6061-T6 alloy showed better wear resistance at higher temperatures when compared to that at room temperature.

scholarly journals Influence of Chromium Concentration on the Abrasive Wear of Ni-Cr-B-Si Coatings Applied by Supersonic Flame Jet (HVOF)

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 915
Author(s):  
Mara Kandeva ◽  
Zhetcho Kalitchin ◽  
Yana Stoyanova
Keyword(s):  
Wear Resistance ◽  
Thermal Treatment ◽  
Composite Coatings ◽  
Research Work ◽  
High Hardness ◽  
Wear Intensity ◽  
Chromium Concentration ◽  
Preliminary Thermal Treatment ◽  
Cr Concentration ◽  
Pin On Disk

This research work studies the characteristics of wear and wear resistance of composite powder coatings, deposited by supersonic flame jet (HVOF), which contain composite mixtures Ni-Cr-B-Si having different chromium concentrations—9.9%, 13.2%, 14%, 16%, and 20%, at one and the same size of the particles and the same content of the remaining elements. The coating of 20% Cr does not contain B and Si. Out of each powder composite, coatings have been prepared without any preliminary thermal treatment of the substrate and with preliminary thermal treatment of the substrate up to 650 °C. The coatings have been tested under identical conditions of dry friction over a surface of solid, firmly-attached, abrasive particles using tribological testing device “Pin-on-disk”. Results have been obtained and the dependences of the hardness, mass wear, intensity of the wearing process, and absolute and relative wear resistance on the Cr concentration under identical conditions of friction. It has been found out that for all the coatings the preliminary thermal treatment of the substrate leads to a decrease in the wear intensity. Upon increasing Cr concentration the wear intensity diminishes and it reaches minimal values at 16% Cr. In the case of coatings having 20% Cr concentration, the wear intensity is increased, which is due to the absence of the components B and Si in the composite mixture, whereupon no inter-metallic structures are formed having high hardness and wear resistance. The obtained results have no analogues in the current literature and they have not been published by the authors.

CTS-BD30P ALLOY

Alloy Digest ◽  
2013 ◽  
Vol 62 (8) ◽  
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Martensitic Stainless Steel ◽  
Heat Treating ◽  
Powder Metal ◽  
High Concentration ◽  
Vanadium Carbides

Abstract Carpenter CTS-BD30P alloy is a powder metal processed, air-hardening, martensitic stainless steel that offers corrosion resistance comparable with Type 440C stainless, combined with excellent toughness and wear resistance attributed to a high concentration of vanadium carbides. The Carpenter CTS family of alloys is used for many blade applications. This datasheet provides information on composition and physical properties. It also includes information on corrosion resistance as well as heat treating and powder metal forms. Filing Code: SS-1154. Producer or source: Carpenter Specialty Alloys.

CRUCIBLE CPM S30V

Alloy Digest ◽  
2003 ◽  
Vol 52 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Martensitic Stainless Steel ◽  
Heat Treating ◽  
Corrosion And Wear ◽  
Better Than

Abstract Crucible CPM S30V is a martensitic stainless steel designed with a combination of toughness, wear resistance, and corrosion resistance equal to or better than 440C. This datasheet provides information on composition, physical properties, microstructure, hardness, and elasticity as well as fracture toughness. It also includes information on corrosion and wear resistance as well as heat treating and machining. Filing Code: SS-891. Producer or source: Crucible Service Centers.

CARLSON ALLOY NITRONIC 60

Alloy Digest ◽  
2009 ◽  
Vol 58 (2) ◽  
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Nickel Alloys ◽  
High Temperature Oxidation ◽  
Lower Cost ◽  
Impact Resistance ◽  
Corrosion And Wear ◽  
Temperature Oxidation ◽  
High Nickel ◽  
Temperature Impact

Abstract CARLSON ALLOY NITRONIC 60 is a galling- and wear-resistant austenitic stainless steel that provides a significantly lower-cost alternative to cobalt-bearing and high-nickel alloys. Corrosion resistance is superior to 304 in most media. Approximately twice the yield strength of 340 and 316. Possesses excellent high-temperature oxidation resistance and low-temperature impact resistance. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion and wear resistance as well as forming. Filing Code: SS-1029. Producer or source: G.O. Carlson Inc.

SANDVIK HIGH-N

Alloy Digest ◽  
2019 ◽  
Vol 68 (8) ◽  
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Corrosion And Wear ◽  
Steel Company

Abstract Sandvik High-N is both N and Mo alloyed austenitic stainless steel. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion and wear resistance as well as forming and heat treating. Filing Code: SS-1308. Producer or source: Sandvik Steel Company.

TRISTELLE ALLOY 5183

Alloy Digest ◽  
1997 ◽  
Vol 46 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Wear Resistance ◽  
Physical Properties ◽  
Corrosion And Wear ◽  
Nuclear Plant ◽  
Cobalt Alloys ◽  
Hardfacing Alloy ◽  
Steel Base

Abstract Tristelle Alloy 5183 is a stainless steel-base hardfacing alloy designed to replace the traditional cobalt alloys for use in nuclear-plant applications. This datasheet provides information on composition, and physical properties as well as fracture toughness. It also includes information on corrosion and wear resistance as well as joining. Filing Code: SS-688. Producer or source: Stoody Deloro Stellite Inc.

scholarly journals Estimation of Wear Resistance for Multilayer Coatings Obtained by Nitrogenchroming

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1153
Author(s):  
Ivan Pavlenko ◽  
Jozef Zajac ◽  
Nadiia Kharchenko ◽  
Ján Duplák ◽  
Vitalii Ivanov ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Spectral Analysis ◽  
Friction Coefficient ◽  
Cutting Tools ◽  
Wear Intensity ◽  
Maximum Amount ◽  
Multilayer Coatings ◽  
Wear Depth ◽  
X Ray ◽  
Machine Parts

This article deals with improving the wear resistance of multilayer coatings as a fundamental problem in metal surface treatment, strengthening elements of cutting tools, and ensuring the reliability of machine parts. It aims to evaluate the wear depth for multilayer coatings by the mass loss distribution in layers. The article’s primary purpose is to develop a mathematical method for assessing the value of wear for multilayer steel-based coatings. The study material is a multilayer coating applied to steel DIN C80W1. The research was performed using up-to-date laboratory equipment. Nitrogenchroming has been realized under overpressure in two successive stages: nitriding for 36 h at temperature 540 °C and chromizing during 4 h at temperature 1050 °C. The complex analysis included several options: X-ray phase analysis, local micro-X-ray spectral analysis, durometric analysis, and determination of wear resistance. These analyses showed that after nitrogenchroming, the three-layer protective coating from Cr23C6, Cr7C3, and Cr2N was formed on the steel surface. Spectral analysis indicated that the maximum amount of chromium 92.2% is in the first layer from Cr23C6. The maximum amount of carbon 8.9% characterizes the layer from Cr7C3. Nitrogen is concentrated mainly in the Cr2N layer, and its maximum amount is 9.4%. Additionally, it was determined that the minimum wear is typical for steel DIN C80W1 after nitrogenchroming. The weight loss of steel samples by 25 mg was obtained. This value differs by 3.6% from the results evaluated analytically using the developed mathematical model of wear of multilayer coatings after complex metallization of steel DIN C80W1. As a result, the impact of the loading mode on the wear intensity of steel was established. As the loading time increases, the friction coefficient of the coated samples decreases. Among the studied samples, plates from steel DIN C80W1 have the lowest friction coefficient after nitrogenchroming. Additionally, a linear dependence of the mass losses on the wearing time was obtained for carbide and nitride coatings. Finally, an increase in loading time leads to an increase in the wear intensity of steels after nitrogenchroming. The achieved scientific results are applicable in developing methods of chemical-thermal treatment, improving the wear resistance of multilayer coatings, and strengthening highly loaded machine parts and cutting tools.

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