scholarly journals Increased Wear Resistance of High-Speed Tools Due to Diffusion Discrete Oxidation

2021 ◽  
Vol 346 ◽  
pp. 02014
Author(s):  
Elena A. Chekalova ◽  
Andrey V. Zhuravlev
Keyword(s):  
Wear Resistance ◽  
Comparative Studies ◽  
Surface Hardening ◽  
High Speed ◽  
Cutting Tool ◽  
Plasma Technology ◽  
Polycrystalline Structure ◽  
Ion Plasma ◽  
Discrete Surface ◽  
Oxidation Technology

Comparative studies of the effect of discrete surface hardening by standard ion-plasma technology and discrete oxidation technology on wear resistance have been carried out. Metallographic studies have shown that discrete oxidation has a polycrystalline structure. It was found that the technology of discrete oxidation makes it possible to increase the hardness by 31% in relation to the uncoated material, and the wear resistance of the cutting tool with oxidation is 1.5-3 times higher than that of the tool hardened by the standard ion-plasma technology.

Discrete Oxidation of a Hard Carbide Tool

2021 ◽  
Vol 316 ◽  
pp. 777-782
Author(s):  
Elena A. Chekalova ◽  
A.V. Zhuravlev
Keyword(s):  
Surface Hardening ◽  
High Speed ◽  
Cutting Tool ◽  
Uniform Structure ◽  
Complex Profile ◽  
Plasma Technology ◽  
Oxidation Layer ◽  
Ion Plasma ◽  
Discrete Surface ◽  
Oxidation Technology

Comparative investigations of the effect of discrete surface hardening by standard ion-plasma technology and discrete oxidation technology on the structure and hardness of high-speed steels are carried out. It is shown that, after hardening in the ion-plasma installation on the surface and in the thickness of the layer, droplet-shaped defects, craters and bundles are formed. Metallographic studies showed that the hardened discrete oxidation layer after repeated hardening has a dense, uniform structure. It has been established that the discrete oxidation technology allows to increase the wear resistance of a complex-profile cutting tool 2 times more, compared to a tool hardened by standard ion-plasma technology after regrinding.

Structure and Properties of a Local Diffusion Discrete Coating Applied to High Speed Steel

2021 ◽  
Vol 1037 ◽  
pp. 435-441
Author(s):  
Elena A. Chekalova ◽  
A.V. Zhuravlev
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
High Speed ◽  
Cutting Tool ◽  
High Speed Steel ◽  
Oxide Coating ◽  
Structure And Properties ◽  
Plasma Technology ◽  
Ion Plasma ◽  
Local Diffusion

Investigations of metallographic and mechanical properties of local diffusion discrete oxide coating on high-speed steel Р6М5 have been carried out. It was found that the technology of discrete oxidation makes it possible to increase the hardness by 31% in relation to the uncoated material, and the wear resistance of the cutting tool with oxidation is 1.5-3 times higher than that of the tool hardened by the standard ion-plasma technology.

scholarly journals Strengthening the Surface Layer of Tools with State-of-the-Art Technologies

2021 ◽  
Vol 22 (1) ◽  
pp. 78-102
Author(s):  
K. O. Kostyk ◽  
V. O. Kostyk ◽  
V. D. Kovalev
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Surface Hardening ◽  
High Speed ◽  
Cutting Tool ◽  
Surface Condition ◽  
Surface Hardness ◽  
Physical And Mechanical Properties ◽  
Boride Layer ◽  
Hard Alloys

Increasing both the service life and the wear resistance of the tool by surface hardening is an urgent issue. Its solution contributes to a significant increase in the performance of products. Available methods of surface hardening of tools, based on coating or changing the surface condition, are becoming increasingly important due to the complexity of the operation of products. Plates made of the T5K10 (85%WC–6%TiC–9%Co) and T15K6 (79%WC–15%TiC–6%Co) hard alloys as well as cylindrical samples made of the W6Mo5Cr4V2 and W18Cr4V high-speed steels are used for the study. Studies have shown that, after processing the T15K6 alloy plates with a pulsed magnetic field, the cutting tool life improved by more than 200% as compared to the untreated ones. The proposed method will increase the strength of carbide plates and stabilize the physical and mechanical properties of the cutting tool. For tools made of alloy steels, the hardening treatment is carried out by the boron method in pastes with nanodisperse powders. As shown, the thickness of the boride layer for high-speed steels increases with the duration of the process; however, its growth rate depends on the composition of the steel. An increase in the holding time of the chemical and thermal treatment leads to the growth of boride layers. The layer thickness changes quadratically (as a second-degree polynomial) with duration time. A feature of formation of diffusion layers is revealed. The dependences of both the surface hardness and the thickness of boride layer on the borating time for high-speed steels are also shown. Studies have shown that boriding in a nanodisperse medium can significantly increase the wear resistance of steels. The method of expert assessments of the maximum values of the surface properties of the studied steels is carried out. As shown, it is more rational to use W6Mo5Cr4V2 steel as a cutting tool after hardening the surface layer by boriding in a nanodisperse boron-containing powder. The proposed processing method demonstrates the prospects of using it to improve the performance of products. In addition, this method of hardening can significantly increase the wear resistance of materials (by ≈3.38–3.75 times) as compared to steels without processing.

VASCODYNE

Alloy Digest ◽  
1984 ◽  
Vol 33 (11) ◽  
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Metal Cutting ◽  
Lower Cost ◽  
Cutting Tool ◽  
High Speed Steel ◽  
Heat Treating ◽  
Hot Hardness

Abstract VascoDyne is a high-speed steel for the metal-cutting industry. This steel is designed to give equivalent or better performance than many grades of high-speed steel now in use and at a lower cost. VascoDyne provides improved hot hardness and wear resistance over conventional high-speed steels such as AISI Types, M1, M7 and M10. VascoDyne is recommended as an excellent alternate to the traditional high-speed steels used in cutting-tool applications. This datasheet provides information on composition and hardness. It also includes information on forming, heat treating, and machining. Filing Code: TS-431. Producer or source: Teledyne Vasco.

FAGERSTA M-2

Alloy Digest ◽  
1978 ◽  
Vol 27 (8) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
High Speed ◽  
Cutting Tool ◽  
High Speed Steel ◽  
Heat Treating ◽  
General Purpose

Abstract FAGERSTA M-2 is a widely used molybdenum-base high-speed steel. It is suitable for all general-purpose cutting-tool applications and it has an excellent combination of toughness and wear resistance. Its many applications include boring tools, chisels, lathe tools and shear blades. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, and surface treatment. Filing Code: TS-337. Producer or source: Fagersta Steels Inc..

scholarly journals Modeling of Non-Stationary Processes When Cutting Hard-to-Process Materials

2021 ◽  
Vol 248 ◽  
pp. 04018
Author(s):  
Sergey Grigoriev ◽  
Mars Migranov ◽  
Abdumalik Seitkulov
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Metal Cutting ◽  
Production Efficiency ◽  
Cutting Tool ◽  
Experimental Studies ◽  
Increase Production Efficiency ◽  
Longitudinal Length ◽  
Blade Cutting ◽  
Cutting Modes

In the conditions of high-speed processing of parts of complex configuration, with a large end and longitudinal length, from hard-to-work steels and alloys, it is difficult to ensure the wear resistance of the cutting tool in the aisles of one technological passage. To ensure the appropriate quality indicators of the surface layer, it is impossible to replace a worn-out cutting tool. In connection with the above, the problem of ensuring the operability (wear resistance) of the cutting tool is acute. The results of theoretical and experimental studies of contact phenomena in blade cutting based on the thermodynamics of non – equilibrium processes and from the standpoint of self-organization of the tribosystem are presented. the developed thermodynamic model of blade processing with variable cutting modes (non-stationary) allows to minimize the wear of the cutting tool and generally increase production efficiency by accelerating the drive of the main movement of the metal-cutting machine.

AL TECH LMW-V

Alloy Digest ◽  
1979 ◽  
Vol 28 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Speed ◽  
Cutting Tool ◽  
High Speed Steel ◽  
Heat Treating ◽  
Specialty Steel ◽  
Toughness Characteristic

Abstract AL Tech LMW-V is a molybdenum-type high-speed steel used extensively by domestic cutting-tool makers. It was designed to offer increased wear resistance while retaining the toughness characteristic of molybdenum-type high-speed steels. It is suitable for a wide variety of cutting-tool applications where improved resistance to abrasion is desired. Typical applications include twist dri milling cutters. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, and machining. Filing Code: TS-353. Producer or source: AL Tech Specialty Steel Corporation.

scholarly journals Cutting performance of deep cryogenic treated and nitrided HSS cutting tool inserts

2019 ◽  
Vol 13 (3) ◽  
pp. 213-217
Author(s):  
Sanja Šolić ◽  
Zdravko Schauperl ◽  
Vlado Tropša
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Cutting Tool ◽  
Cryogenic Treatment ◽  
Single Point ◽  
Cutting Tools ◽  
Cutting Speed ◽  
High Speed Steel ◽  
Cutting Performance ◽  
Deep Cryogenic Treatment

High speed steel (HSS) is a very important industrial tool material and has been constantly improved for different wear resistance applications and cutting tools, i.e. drills, milling cutters, hobs and for the cutting tools in which the economical cutting speed is too low for choosing the carbide tools. The properties of HSS depend significantly on the parameters of the conducted heat treatment. In this paper, the influence of deep cryogenic treatment in combination with nitriding of metallurgical powder metallurgy HSS on the wear resistance was measured. Additionally, the cutting performance in a single point cutting tool machinability test at the configuration of the dry low-speed turning of steel was investigated. The results showed that deep cryogenic treatment itself, and in combination with nitriding, resulted in the reduction of the wear rate. The results of the single point cutting tool machinability test showed that deep cryogenic treated and nitrided HSS inserts performed worse than the classically heat-treated inserts and deep cryogenic treated HSS inserts exhibited approximately the same flank wear as the nitrided ones.

scholarly journals INCREASING OF WEAR RESISTANCE OF RESPONSIBLE PARTS OF THE HYDRAULIC BREAKER BY ION-PLASMA TREATMENT

2020 ◽  
Vol 2 (61) ◽  
pp. 12-18
Author(s):  
D. Hlushkova ◽  
◽  
O. Voronkov ◽  
I. Кirichenko ◽  
O. Nikonov ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Surface Hardening ◽  
Metal Ion ◽  
Structural Changes ◽  
Experimental Studies ◽  
Surface Areas ◽  
Chromium Plating ◽  
Ion Plasma ◽  
Hydraulic Hammer ◽  
Substrate Temperatures

During operation, parts of the hydraulic hammer are subjected to intense abrasive wear, which leads to a decrease in the duration of their work. The issue of increasing wear resistance occupies a special place in solving the problem of ensuring the necessary resource of these parts. In accordance with the literature data, as well as on the basis of analysis of many years of experience in operating hydraulic hammers, many methods of volumetric and surface hardening of parts are used that do not give a significant effect. Therefore, it became relevant to attract new methods of surface hardening. These methods include ion-plasma chromium plating. As the tasks of the work, a detailed analysis of the damaged working surfaces of the hydraulic hammer parts was provided; the study of changes in the structure and properties of hardened surface areas during operation; development of the hardening process, providing increased wear resistance of parts as a result of ion-plasma chromium plating. We investigated the condition of the working surface of the critical parts of the hydraulic hammer - the hammer and peaks - after hardening and operation. Data were obtained on the nature and intensity of wear in the zones and sections of each part. High-quality chromium coatings were obtained at substrate temperatures not lower than 80–100 ° С. Based on experimental studies, the effect of ion-plasma chromium plating on the wear resistance and mechanical properties of hydraulic hammer parts is proved, and structural changes in the material are analyzed. After operation, the surface of the part may have defects such as scuffing, cracks along the axis of the part, loss of metal mass (decrease in coating thickness), as well as local hardening and deformation of the metal. Ion-plasma chrome plating of parts according to the proposed technology increased their wear resistance by 1.75 times compared with unstressed. The technology of ion-plasma chromium plating ensures the operation of hardened parts without chips and without chipping. In areas of damage to parts, zones of structural transformations characteristic of secondary hardening phenomena are noted.

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