scholarly journals The resistance of ledeburitic tool steels against the abrasive wear

2012 ◽  
Vol 60 (6) ◽  
pp. 231-242 ◽  
Author(s):  
Jaromír Liška ◽  
Josef Filípek
Keyword(s):  
Wear Resistance ◽  
Laboratory Test ◽  
Abrasive Wear ◽  
Structural Steel ◽  
Aluminium Alloys ◽  
Structural Steels ◽  
Tool Steels ◽  
Maximum Hardness ◽  
Resistant Material ◽  
Operational Tests

The ledeburitic tool steels which used to be used mainly for cutting and shaping tools nowadays are frequently used for a manufacture of injection moulds, moulds for pressure castings of aluminium alloys and for moulds for ceramics processing. The article deals with findings of ledeburitic tool steels resistance against abrasive wear. For the tests there were prepared the test samples of ledeburitic tool steels 19 436 and 19 573 (both according to ČSN). Moreover there were prepared the samples from structural abrasion resistant material Hardox 450 and from unalloyed structural steel 11 373 (according to ČSN). A wear resistance was examined by means of a laboratory test with an abrasive cloth and the Bond’s device. Hereafter the article deals with a possibility of utilisation of ledeburitic alloyed steels for a manufacture of tools for a land processing. For the examination of a resistance against wear in land there was made a plough test in which the tested samples were mounted on plough blades. By means of both the laboratory and operational tests there was found multiple higher resistance against wear of ledeburitic tool steels rather than of structural steels. During a land processing there was found unsuitability of steels processed for a maximum hardness, which came out as fractures of several samples.

VASCO TUF

Alloy Digest ◽  
1974 ◽  
Vol 23 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Cold Work ◽  
Heat Treating ◽  
Tool Steels ◽  
Maximum Hardness ◽  
Die Steel ◽  
Warm Working

Abstract VASCO TUF is an air-hardening die steel ideally suited for cold-work applications requiring good toughness. It has better wear resistance than the shock-resisting tool steels. It achieves a maximum hardness of Rockwell C 58-60 when multiple tempered at 950 F: this means that it can also be used for warm-working applications without losing hardness. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: TS-274. Producer or source: Teledyne Vasco.

Surface Layers Produced by Modified Floe Ferritic Nitrocarburising

2015 ◽  
Vol 812 ◽  
pp. 253-258
Author(s):  
Andrea Szilagyine Biro ◽  
Endre Szabo ◽  
Miklos Tisza
Keyword(s):  
Wear Resistance ◽  
White Layer ◽  
Nitrided Layer ◽  
High Surface ◽  
Surface Hardness ◽  
Structural Steels ◽  
Surface Alloying ◽  
Tool Steels ◽  
Micro Hardness ◽  
Surface Layers

Ferritic nitrocarburising is a surface alloying heat treatment, which can provide to components high surface hardness, thus improved wear resistance. In structural steels the porosity of white layer has a key role in wear resistance: the porosity is undesirable. For tool steels the absence of white layer is undesirable. Floe process is one way to decrease the porosity of white layer. During our experiments we applied a modified Floe process on two different steels. The acontol of this process is simpler than conventional process. We measured the micro-hardness as a function of depth from the surface, and we made microscopic examination to analyse the structure of nitrided layer.

scholarly journals Method of providing wear-resistance of the blades of paddle mixers.

2019 ◽  
pp. 32-35
Author(s):  
G. V. Petrishin ◽  
V. M. Bystrenkov ◽  
V. I. Odarchenko
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Protective Coatings ◽  
Thermal Spraying ◽  
Technical Solution ◽  
Scientific Publications ◽  
Actual Problem ◽  
Advantages And Disadvantages ◽  
Operational Tests ◽  
Paddle Mixer

The work is devoted to solution of the actual problem to increase the service life of blade mixers used in the foundry industry. The existing methods for ensuring wear resistance of mixing blades are described, their advantages and disadvantages are indicated. Based on the analysis of scientific publications a technical solution for applying protective coatings to the blades of the mixer using gas-thermal spraying has been proposed. The results of laboratory studies of the wear rate of gas-thermal coatings from various powder mixtures of the Ni-Cr-B-Si system under conditions of abrasive wear are presented. The results of operational tests of experimental products under conditions of corrosion and abrasive wear during the operation of a paddle mixer are given. The composition of the powder mixtur ensuring maximum wear resistance of the mixer blades was developed.

Abrasive wear of polymer/steel gear drives

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.

XAR 400

Alloy Digest ◽  
2014 ◽  
Vol 63 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Structural Steel ◽  
Tensile Properties ◽  
Heat Treating ◽  
Rolled Plate ◽  
Wear Resistant ◽  
Heavy Plate ◽  
Key Factor

Abstract XAR 400 (No. 1.8714) is a wear-resistant structural steel as heavy plate that is normalized or normalized rolled plate. XAR (extra abrasion resistant) steels are solutions for applications where wear is a key factor. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness. It also includes information on wear resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-704. Producer or source: ThyssenKrupp Steel Europe AG.

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