EFFECT OF LASER HARDENING OF STEEL ON THE WEAR PROCESS IN AN ABRASIVE SOIL MASS

This paper presents the results of tests for the effects of laser hardening on the course and intensity of wear of 38GSA (38MnSi4) and Hardox 600 steels in an abrasive soil mass. The tests were carried out under laboratory conditions, using a “rotating bowl” type machine. Two types of soil, i.e. light and medium, were used as the abrasive mass. Based on the obtained test results, it was found that hardness decreased (in relation to asdelivered condition). The performed laser surface hardening process significantly increased the abrasive wear resistance only for 38GSA (38MnSi4) steel. As regards to Hardox steel, the hardening treatment reduced the abrasive wear resistance index compared to the as-delivered condition of the steel.

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Effect of Superficial Residual Stresses on Abrasive Wear Resistance of Al2O3 / Al2O3+3Y-TZP Multilayers

Materials Science Forum ◽

10.4028/www.scientific.net/msf.502.217 ◽

2005 ◽

Vol 502 ◽

pp. 217-224

Author(s):

Goffredo de Portu ◽

L. Micele ◽

D. Prandstraller ◽

G. Palombarini ◽

Giuseppe Pezzotti

Keyword(s):

Residual Stress ◽

Wear Resistance ◽

Residual Stresses ◽

Abrasive Wear ◽

Compressive Stress ◽

Compressive Residual Stress ◽

Tape Casting ◽

Cold Isostatic Pressing ◽

Abrasive Wear Resistance ◽

Test Results

Multilayered composite specimens consisting of Al2O3 / Al2O3+ 3Y-TZP (A/AZ) layers with different compositions and thicknesses were prepared starting from ceramic sheets obtained by tape casting. Residual stresses arisen from mismatch in thermal expansion coefficient during sintering were evaluated using luminescence piezo-spectroscopy. The stress in the superficial A layer was found to be compressive, and its value depended on the ratio between thickness of A and AZ layer. The influence of the superficial compressive stress on the abrasive wear resistance was investigated using microscale ball cratering test; results were correlated with the superficial compressive stress and compared with a specimen of pure unstressed Al2O3 prepared both by lamination and by cold isostatic pressing. Experiments show an improvement of performances in the samples containing compressive residual stress in the surface.

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Abrasion Wear Resistance of Polymer Constructional Materials for Rapid Prototyping and Tool-Making Industry

Polymers ◽

10.3390/polym12040873 ◽

2020 ◽

Vol 12 (4) ◽

pp. 873 ◽

Cited By ~ 6

Author(s):

Janusz Musiał ◽

Serhiy Horiashchenko ◽

Robert Polasik ◽

Jakub Musiał ◽

Tomasz Kałaczyński ◽

...

Keyword(s):

Wear Resistance ◽

Abrasive Wear ◽

Construction Materials ◽

Abrasive Wear Resistance ◽

Polymer Materials ◽

Test Results ◽

Abrasion Wear ◽

Different Types ◽

Resistance Prediction ◽

Set Up

The original test results of abrasive wear resistance of different type of construction polymer materials were presented and discussed in this article. Tests were made on an adapted test stand (surface grinder for form and finish grinding). Test samples were made of different types of polymer board materials including RenShape®, Cibatool® and phenolic cotton laminated plastic laminate (TCF). An original methodology based on a grinding experimental set-up of abrasion wear resistance of polymer construction materials was presented. Equations describing relations between material type and wear resistance were presented and discussed. Micro and macro structures were investigated and used in wear resistance prediction.

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RESISTANCE TO WEAR AS A FUNCTION OF THE MICROSTRUCTURE AND SELECTED MECHANICAL PROPERTIES OF MICROALLOYED STEEL WITH BORON

Tribologia ◽

10.5604/01.3001.0010.6986 ◽

2016 ◽

Vol 268 (4) ◽

pp. 101-114 ◽

Cited By ~ 5

Author(s):

Łukasz KONAT ◽

Jerzy NAPIÓRKOWSKI ◽

Karol KOŁAKOWSKI

Keyword(s):

Wear Resistance ◽

Abrasive Wear ◽

Structural Type ◽

Heat Treatment Condition ◽

Abrasive Wear Resistance ◽

Test Results ◽

Carbide Phases ◽

Fine Grained Structure ◽

And Performance ◽

Resistance Tests

The paper presents the structure and the results of abrasive wear resistance tests of XAR®600, TBL PLUS, and B27 steel. As a result of the tests conducted by means of light and scanning microscopy, it has been proven that these types of steel are characterised by subtle differences in their structures, affecting their strength and performance properties. In the delivered condition, all types of steel are characterised by a fine-grained structure with post-martensitic orientation with insets of carbide phases. The structural type of the discussed steel types disclosed in the course of the research, as well as the results of the conducted spectral analyses of the chemical composition, indicate that their properties are shaped in the course of specialist procedures of thermomechanical rolling. According to the above-mentioned test results, it can be concluded that the analysed steel types were designed in compliance with the canons of materials engineering in relation to low-alloy steel resistant to abrasive wear. Due to this, the obtained results of the structural tests of XAR®600, TBL PLUS, and B27 steel were subjected to verification in the course of abrasive wear resistance tests by means of the “spinning bowl” method. The tests, conducted in real soil masses – loamy sand, light clay, and normal clay, compared with the results of hardness measurements, indicated a strict dependence of abrasive wear resistance ratios as a function of structure and the heat treatment condition of the tested types of steel. All the obtained test results were referred to 38GSA steel in a normalised condition.

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THE EFFECT OF THE METHOD AND PARAMETERS OF THE HEAT TREATMENT ON ABRASIVE WEAR RESISTANCE OF 38GSA STEEL

Tribologia ◽

10.5604/01.3001.0013.5435 ◽

2019 ◽

Vol 285 (3) ◽

pp. 61-69

Author(s):

Łukasz KONAT ◽

Jerzy NAPIÓRKOWSKI

Keyword(s):

Heat Treatment ◽

Wear Resistance ◽

Abrasive Wear ◽

Soil Mass ◽

Abrasive Wear Resistance ◽

Structural Testing ◽

Resistance Testing ◽

Austenite Grain ◽

Close Relationship ◽

Martensite Structure

This paper presents the structure and the results of abrasive wear resistance testing for 38GSA steel in an asdelivered condition (after heat refining) and after volume hardening. Based on the tests conducted by both light and scanning microscopy methods, it was demonstrated that, due to the performed technological operations, this steel differed significantly in terms of structure compared to the as-delivered condition, which affected its performance characteristics. In an as-delivered condition, 38GSA (38MnSi4) steel is characterised by a finegrained ferrite-pearlite structure with martensite areas arranged in bands, which significantly differs from the structure typical of the state of equilibrium. After volume hardening, the steel in question is characterised by a homogeneous fine-stripped martensite structure with clearly visible former austenite grain boundaries. The obtained results of structural testing on 38GSA steel were related to the actual abrasive wear resistance indices obtained by the “rotating bowl” method using various abrasive soil mass types. Tests conducted in the following soils, i.e. light (loamy sand), medium (light loam) and heavy (common loam), including hardness measurements, showed a close relationship between the results obtained for abrasive wear resistance and the phase structure resulting from the heat treatment state of the tested material. The obtained results of the tests on 38GSA steel were compared to those for low-alloyed martensitic abrasive wear resistant steels Hardox 500 and Brinar 500.

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BÖHLER K100

Alloy Digest ◽

10.31399/asm.ad.ts0788 ◽

2020 ◽

Vol 69 (3) ◽

Keyword(s):

Wear Resistance ◽

Physical Properties ◽

Abrasive Wear ◽

Tool Steel ◽

Cold Work ◽

Abrasive Wear Resistance ◽

High Carbon ◽

High Chromium ◽

Cold Work Tool Steel

Abstract Böhler K100 is a high-carbon, high-chromium (12%), alloy cold-work tool steel that is suitable for medium run tooling in applications where a very good abrasive wear resistance is needed but where demands on chipping resistance are small. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming and machining. Filing Code: TS-788. Producer or source: voestalpine Böhler Edelstahl GmbH & Co.

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SANDVIK APM 2730

Alloy Digest ◽

10.31399/asm.ad.ts0763 ◽

2019 ◽

Vol 68 (4) ◽

Keyword(s):

Wear Resistance ◽

Compressive Strength ◽

Physical Properties ◽

Abrasive Wear ◽

Tool Steel ◽

High Speed ◽

Heat Treating ◽

Abrasive Wear Resistance ◽

Steel Company ◽

High Compressive Strength

Abstract Sandvik APM 2730 is a powder metallurgical alloyed hot-isostatic-pressed high-speed tool steel with abrasive wear resistance and high-compressive strength. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on heat treating and machining. Filing Code: TS-763. Producer or source: Sandvik Steel Company.

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BÖHLER K107

Alloy Digest ◽

10.31399/asm.ad.ts0799 ◽

2020 ◽

Vol 69 (9) ◽

Keyword(s):

Wear Resistance ◽

Physical Properties ◽

Abrasive Wear ◽

Cold Work ◽

Heat Treating ◽

Abrasive Wear Resistance ◽

Tungsten Alloy ◽

High Carbon ◽

Cold Work Tool Steel ◽

Very High

Abstract Böhler K107 is a high-carbon (2.1%), 12% chromium. 0.7 % tungsten, alloy cold-work tool steel that is used in applications where a very high abrasive wear resistance is needed, but where demands on chipping resistance are small. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming and heat treating. Filing Code: TS-799. Producer or source: voestalpine Böhler Edelstahl GmbH&Co KG.

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On effect of surface hardening on impact and abrasive wear resistance of Hadfi eld steel

10.36652/1813-1336-2020-16-6-252-255 ◽

2020 ◽

pp. 252-255

Author(s):

V.I. Bolobov ◽

V.S. Bochkov ◽

E.V. Akhmerov ◽

V.A. Plashchinsky ◽

E.A. Krivokrisenko E.A.

Keyword(s):

Plastic Deformation ◽

Wear Resistance ◽

Abrasive Wear ◽

Work Hardening ◽

Surface Hardening ◽

Cold Work ◽

Abrasive Wear Resistance ◽

Hadfield Steel ◽

Mining Equipment ◽

Effect Of Surface

On the example of Hadfield steel, as the most common material of fast-wearing parts of mining equipment, the effect of surface hardening by plastic deformation on their impact and abrasive wear resistance is considered. Wear test is conducted on magnetic ironstone as typical representative of abrasive and hard rock. As result of wear of initial samples with hardness of ∼200 HB and samples pre-hardened with different intensities to the hardness of 300, 337 and 368 HB, it is found that during the initial testing period, the initial samples pass the “self-cold-work hardening” stage with increase in hardness to ∼250 HB, which remains virtually unchanged during further tests; the hardness of the pre-hardened samples does not change significantly throughout the tests. It is established that the rate of impact-abrasive wear of pre-hardened samples is significantly (up to 1.4 times) lower than the original ones that are not subjected to plastic deformation, and decreases with increasing degree of cold-work hardening. Preliminary surface hardening by plastic deformation can serve as effective way to increase the service life of fast-wearing working parts of mining equipment.

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INCREASING THE WEAR RESISTANCE OF THE WORKING BODIES OF AGRICULTURAL MACHINES BY THE HDTV METHOD WITH ADDING POWDER OF THE EED METHOD

Tekhnicheskiy servis mashin ◽

10.22314/2618-8287-2020-58-4-123-131 ◽

2020 ◽

Vol 4 (141) ◽

pp. 123-131

Author(s):

IL’YA ROMANOV ◽

Keyword(s):

Wear Resistance ◽

Abrasive Wear ◽

High Frequency ◽

Machine Building ◽

Abrasive Wear Resistance ◽

Research Purpose ◽

Powder Materials ◽

Agricultural Machinery ◽

Resource Saving ◽

Working Bodies

The development of energy and resource-saving methods and technologies for strengthening and restoring the working bodies of agricultural machinery will increase their abrasive wear resistance and durability by using materials from machine-building waste and reduce the cost by 10-30 percent without reducing operational characteristics. (Research purpose) The research purpose is in increasing the abrasive wear resistance and durability of cultivator legs by surfacing powder materials obtained by electroerosive dispersion from solid alloy waste by high-frequency currents. (Materials and methods) Authors obtained a powder for research on their own experimental installations of the CCP "Nano-Center" of electroerosive dispersion from waste of sintered hard alloys of the T15K6 brand. The microhardness of powders and coatings on microshifts was measured using the PMT-3 device, and the hardness of coatings with the KMT-1 microhardometer was measured using the Rockwell method according to GOST 9013-59. The microwave-40AV installation was used to assess the wear resistance of materials of working bodies of tillage machines. (Results and discussion) In the course of laboratory wear tests the relative wear resistance of samples hardened by high-frequency surfacing currents significantly exceeds the wear resistance of non-hardened samples made OF 65g steel, accepted as the reference standard. (Conclusions) Based on the results of experimental studies, the article proposes a new resource-saving technological process for strengthening the working bodies of agricultural machinery through the use of materials from machine-building waste, which allows increasing the abrasive wear resistance of working bodies by 1.5-2 times due to the use of tungsten-containing materials.

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