Multiphase steel with improved impact-abrasive wear resistance in comparison with conventional Hadfield steel

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.

Download Full-text

The Role of Distribution Forms of Fe–Cr–C Cladding Layer in the Impact Abrasive Wear Performance of Hadfield Steel

Materials ◽

10.3390/ma13081818 ◽

2020 ◽

Vol 13 (8) ◽

pp. 1818

Author(s):

Zhang Pan ◽

Xuanpu Dong ◽

Huatang Cao ◽

Qiwen Huang

Keyword(s):

Wear Resistance ◽

Abrasive Wear ◽

Abrasive Wear Resistance ◽

Hadfield Steel ◽

Wear Performance ◽

Cladding Layer ◽

Glass Sand ◽

The Impact ◽

Cladding Layers

To investigate the role of different distribution forms of Fe–Cr–C cladding layer in the impact abrasive wear performance of Hadfield steel, the over-lapped Fe–Cr–C cladding layer and dot-shaped Fe–Cr–C cladding layer were deposited, respectively, by plasma transferred arc (PTA) cladding on Hadfield steel. The microstructure, microhardness and impact abrasive wear performance of the two cladding layers under the impact of glass sand, granite and quartz sand were investigated. The results showed that both microstructures of the cladding layers were hypoeutectic Fe–Cr–C microstructures. The average microhardness of the over-lapped cladding layer and dot-shaped cladding layer was around 560 HV0.2 and 750 HV0.2, respectively. The over-lapped Fe–Cr–C cladding layer could only improve the impact abrasive wear resistance of the Hadfield steel under the wear condition of the glass sand. Meanwhile, the dot-shaped Fe–Cr–C cladding layer could improve the impact abrasive wear resistance of the Hadfield steel under all the three kinds of the abrasives because of the overall strengthening effect of its convex shape and the hypoeutectic FeCrC microstructure.

Download Full-text

Cast High-Manganese Steel – the Effect of Microstructure on Abrasive Wear Behaviour in Miller Test

Archives of Foundry Engineering ◽

10.1515/afe-2015-0033 ◽

2015 ◽

Vol 15 (2) ◽

pp. 35-38 ◽

Cited By ~ 3

Author(s):

B. Kalandyk ◽

G. Tęcza ◽

R. Zapała ◽

S. Sobula

Keyword(s):

Wear Resistance ◽

Abrasive Wear ◽

Cast Steel ◽

Abrasive Wear Resistance ◽

Manganese Steel ◽

Hadfield Steel ◽

Wear Behaviour ◽

Stable Complex ◽

High Manganese ◽

High Manganese Steel

Abstract The results of the modification of austenitic matrix in cast high-manganese steel containing 11÷19% Mn with additions of Cr, Ni and Ti were discussed. The introduction of carbide-forming alloying elements to this cast steel leads to the formation in matrix of stable complex carbide phases, which effectively increase the abrasive wear resistance in a mixture of SiC and water. The starting material used in tests was a cast Hadfield steel containing 11% Mn and 1.34% C. The results presented in the article show significant improvement in abrasive wear resistance and hardness owing to the structure modification with additions of Cr and Ti.

Download Full-text

Tools Cast from The Steel of Composite Structure

Archives of Metallurgy and Materials ◽

10.2478/amm-2013-0075 ◽

2013 ◽

Vol 58 (3) ◽

pp. 803-808 ◽

Cited By ~ 2

Author(s):

J. Głownia ◽

G. Tęcza ◽

M. Asłanowicz ◽

A. Osciłowski

Keyword(s):

Wear Resistance ◽

Abrasive Wear ◽

Composite Structure ◽

Cast Steel ◽

Casting Process ◽

Abrasive Wear Resistance ◽

Manganese Steel ◽

Hadfield Steel ◽

Entire Volume ◽

The Matrix

Abstract Hardness, microstructure and abrasive wear resistance of cast high-manganese steel (cast Hadfield steel) were compared with the cast steel of the same austenitic matrix but having vanadium carbides uniformly distributed within its entire volume. The chemical composition of the cast steel was chosen in such a way as to produce a composite structure after the alloy solidification. A similar hardness of the matrix was obtained with carbides evenly distributed in it, while abrasive wear resistance doubled its value. Using the investment casting process, working elements of teeth for the excavators and mechanical coal miners were cast.

Download Full-text

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.

Download Full-text

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.

Download Full-text

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.

Download Full-text

Increasing in wear resistance of excavating machine elements

10.36652/1813-1336-2020-16-7-306-308 ◽

2020 ◽

pp. 306-308

Author(s):

V.S. Bochkov

Keyword(s):

Wear Resistance ◽

Wear Rate ◽

Abrasive Wear ◽

Thermomechanical Treatment ◽

Cold Work ◽

Hadfield Steel ◽

Outer Side ◽

Viii And Ix ◽

Machine Elements ◽

The Impact

The relevance of the search for solutions to increase the wear resistance of bucket teeth of excavating machine type front shovel is analyzed. The reasons for the wear of the teeth are considered. It is determined that when excavating machines work for rocks of VIII and IX categories, impact-abrasive wear of the inner side of the teeth and abrasive external wear occurs. It is proved that the cold-work hardening of Hadfield steel (the teeth material), which occurs during the excavating machine teeth work in the rocks of VIII and IX categories, reduces the impact-abrasive wear rate on the inner side of the teeth and does not affect the abrasive wear of the outer. The methods for thermomechanical treatment of the outer side of the excavating machine tooth is proposed. It can increase the wear resistance of Hadfield steel (110G13L) up to 1.7 times and lead to the self-sharpening effect of the tooth due to equalization of the wear rate of the outer and inner parts of the tooth. The efficiency factor of thermomechanical treatment to reduce the of abrasive wear rate of Hadfield steel is experimentally proved.

Download Full-text

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.

Download Full-text