Interrelation between the structure parameters, mechanical properties of sprayed materials and the tool life in cutting them

Klimenko, S. A.; Mel’niichuk, Yu. A.; Vstovskii, G. V.

doi:10.3103/s1063457608020068

Cited by 9 publications

(11 citation statements)

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“…Further pickup of the abrasive particle by liquid flow results in removal of compression load and partial elastic restoration of the deformed volume of the surface layer, that is, in occurrence of tensions in this local volume, which causes redistribution of tensions among the components of HA structure. In this case, at first carbide grain boundaries break, which results in appearance of microcracks in HA carbide grains themselves and plastic deformation along the dislocation mechanism of cobalt bundle [2,3]. After that the boundaries between the carbide grains and the bundle and the bundle itself break.…”

Section: Element Provisionmentioning

confidence: 99%

“…In Ref. [2], it is shown that hybrid processing methods based on a combination of different ways of power and other flows impact on the material that make it possible to essentially reduce working hours necessary for production and improve the quality of processing. At the same time, analysis of the final product from the point of view of its useful functions enables improvement of the method and scientific substantiation of most rational ways of impact on the workpiece to achieve the maximum quality level.…”

Section: Introductionmentioning

confidence: 99%

“…2 is the Laplace operator; and р 0 is the pressure at the obstacle p i ¼ 0, 5ρv2 i þ ρv 2 i dQ. Intensification of the stressed condition contributes to development of initial defects and creation of a grid of microcracks actively joining under the action of abrasive particles when material particles come off the surface.…”

mentioning

confidence: 99%

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Cutting Superhard Materials by Jet Methods (on Functional Approach)

Salenko¹,

Shchetynin²,

Gabuzian³

et al. 2020

Recent Advancements in the Metallurgical Engineering and Electrodeposition

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Dimensional processing of products made from hard alloys and superhard materials is of a certain interest for contemporary high-technology production, as it enables creation of half-finished or final products of various geometric shapes from workpieces obtained by sintering. In this case conventional methods, first of all abrasive processing and electroerosion cutting, find limited application, which is caused by special features of the structural condition and physical and mechanical properties of the materials of the processed workpieces. The functional approach can be used in working of composite workpieces from laminated superhard materials. The performed research with the use of hydro-abrasive cutting (HAC), laser cutting (LC), laser cutting with water cooling (LCC), and water jet-guided laser (WJGL) has enabled studying of the intensity of destruction area introduction into the worked piece and finding out the functional features of a particular process that are caused by the working conditions. It has been shown that the hypothesis of quasistationary rate of destruction is unacceptable for such materials, which is caused by the structure and high hardness of the material. It has also been determined that when deepening increases, the rate of jet introduction has a pronounced tendency toward reduction.

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Section: Element Provisionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cutting Superhard Materials by Jet Methods (on Functional Approach)

Salenko¹,

Shchetynin²,

Gabuzian³

et al. 2020

Recent Advancements in the Metallurgical Engineering and Electrodeposition

View full text Add to dashboard Cite

show abstract

“…in occurrence of tensions in this local volume, which causes redistribution of tensions among the components of HA structure. In this case, at first carbide grain boundaries break, which results in appearance of microcracks in HA carbide grains themselves and plastic deformation along the dislocation mechanism of cobalt bundle [10] . After that the boundaries between the carbide grains and the bundle and the bundle itself break.…”

Section:   mentioning

confidence: 99%

Functional Approach to Development of Hybrid Technology of Cutting Diamond Carbides

Salenko

Shchetinin

Gabuzian

et al. 2018

Mater Sci Mater Rev

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Background: Modern composite materials have a number of advantages in comparison with the traditionally used ones and allow implementing new methods of processing, which makes the finished product cheaper and makes its use more efficient.Objective: In order to improving the surface quality and productivity taken by A functional approach. Method: A functional approach to the development of cutting technologies for Carbide and Super Hard Multilayered Composites is considered. It allows, by alternating the effects of different nature, to obtain qualitative edges, to lower the residual stresses in the surface layers, and to achieve a high surface quality. The essence of the approach is that the method of impact is determined on the basis of a morphological search of options for the execution of individual surface elements, each of which, combined into a set, uniquely forms the function of the finished product. The cutting is determined by a rational sequence of execution of technological transitions, provided that each harmful intermediate function at the finish stage turns into neutral or complements the required useful function.Results: Examples of figured cutting of plates from polycrystalline diamond-containing materials are given, the results of obtaining qualitative edges are shown.Conclusion: Thanks to the proposed technology based on the use of a functionally oriented approach, the functions of the tool for cutting are divided between the tool itself and the product part. As a result, the processing speed increases more than 3 times, and a high cut quality is achieved.

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“…According to the authors [27,28,29], the machining of coatings, especially after thermal spraying, has to address two main problems: the adhesion of the coating to the substrate and the wear of the tool. Moreover, the authors [30] state that the efficiency of the machining process depends on the structure and properties of the materials in contact. Achievement of the expected and desirable results, therefore, depends to a large extent on selected tool materials and selected machining parameters [31].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Surface Roughness and Predictive Modelling of Machining Stellite 6

et al. 2019

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The aim of the paper was to examine the influence of cutting conditions on the roughness of surfaces machined by longitudinal turning, namely of surfaces coated with Stellite 6 prepared by high-velocity oxygen fuel (HVOF) technology and applied onto a standard structural steel substrate. From the results of measurements of the cutting parameters, a prediction model of the roughness parameters was created using mathematical and statistical methods. Based on a more detailed analysis and data comparison, a new method for prediction of parameters of longitudinal turning technology was obtained. The main aim of the paper was to identify the mutual discrete relationships between the substrate roughness and the machining parameters. These were the feed rate vc (m·min−1), in the case of turning and milling, and the feed rate f (mm·rev−1) and the depth of cut ap (mm). The paper compared and verified two approaches of this method, namely the mathematical statistical approach, the analytical approach and measured dates. From the evaluated and interpreted results, new equations were formulated, enabling prediction of the material parameters of the workpiece, the technological parameters and the parameters of surface quality.

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Interrelation between the structure parameters, mechanical properties of sprayed materials and the tool life in cutting them

Cited by 9 publications

References 0 publications

Cutting Superhard Materials by Jet Methods (on Functional Approach)

Cutting Superhard Materials by Jet Methods (on Functional Approach)

Functional Approach to Development of Hybrid Technology of Cutting Diamond Carbides

Investigation of Surface Roughness and Predictive Modelling of Machining Stellite 6

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