Impact of a Pulsed Magnetic Field on a Hard Alloy During Machining on Heavy Machine Tools

Kovalov, Viktor; Vasilchenko, Yana; Shapovalov, Maksym; Turmanidze, Raul; Dašić, Predrag

doi:10.24867/ijiem-2019-1-125

IJIEM

2019

DOI: 10.24867/ijiem-2019-1-125

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Impact of a Pulsed Magnetic Field on a Hard Alloy During Machining on Heavy Machine Tools

Viktor Kovalov¹,

Yana Vasilchenko²,

Maksym Shapovalov³

et al.

Abstract: Analysis of the tool work and refusals when heavy machines cutting shows the necessity to use methods of bulk modification for improving structural strength and fracture resistance of cemented carbide cutting plates. It is suggested to test cutting plates to assess the structural strength limit. The accelerated method to estimate the resistance to scattered contact damage and chipping resistance is developed. It is obtained that the pulsed magnetic field treatment (PMNF) of cutting plates (85% WoC, 5% TiC, 10%… Show more

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Cited by 4 publications

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Increase of operational properties of tools and machine parts nitriding the powder mixture

Kostyk

Kovalov

et al. 2019

IOP Conf. Ser.: Mater. Sci. Eng.

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The effect of diffusion layers and alloying elements on surface hardness, micro-coarseness, and wear resistance of hardened tool steels in a nitrogen-containing medium is Studied. The experiments showed that nitriding in the powder mixture strengthens the surface layers in 2–3.5 times without reducing the volume strength of the material in question, which contributes to the preservation of high structural strength of tools and machine parts. It was found that nitriding in the dispersed powder mixture provides increased wear resistance of 1.3–2.5 times of steel, which can significantly improve the reliability and durability of products. Mathematical models of wear resistance of the investigated steels after the proposed hardening technology of nitriding are obtained.

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Increase of operational properties of tools and machine parts nitriding the powder mixture

Kostyk

Kovalov

et al. 2019

IOP Conf. Ser.: Mater. Sci. Eng.

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The technique of designing high-power CNC lathes for enterprises of the heavy engineering industry

Kovalov

Vasilchenko

Turmanidze

et al. 2019

IOP Conf. Ser.: Mater. Sci. Eng.

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Proposed is the method of heavy machine tools constructions’ structural-parametric synthesis based on their components processing parameters statistical study. The process of designing high-power metal cutting equipment that most completely meets the customer’s essential requirements consists in developing its technological structure in the form of a functional-structural model with the main technological parameters (accuracy class, size of working space, necessary power parameters, cutting modes) substantiation.

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

Kostyk¹,

Kostyk²,

Kovalev³

2021

Usp. Fiz. Met.

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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.

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Impact of a Pulsed Magnetic Field on a Hard Alloy During Machining on Heavy Machine Tools

Cited by 4 publications

References 3 publications

Increase of operational properties of tools and machine parts nitriding the powder mixture

Increase of operational properties of tools and machine parts nitriding the powder mixture

The technique of designing high-power CNC lathes for enterprises of the heavy engineering industry

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

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