Roik T.A.

Effect of Diamond Honing Technological Factors for Parameters of Roughness and Exactness of Composite Sliding Bearings Surfaces for Printing Machines

In a paper the research results concerning an influence of honing process’ technological factors such as abrasive tool composition, cutting parameters, number of hones in honing head on surface roughness and surfaces’ exactness of new composite sliding bearings manufactured of new high-alloy composite alloys from tool steels wastes for high-speed printing machine have been presented.

Surfaces’ Roughness of Composite Sliding Bearings of Printing Machines at Fine Cubanite Grinding

The research results of sliding bearings’ roughness formation and which were manufactured from new composite materials on the base of stamp steels wastes for high-speed printing machines friction units were presented in the article. It was shown that high quality parameters of working surfaces, for example, roughness and other quality parameters are formed as a result of interaction between parameters of cutting by cubonit tools such as granulosity and properties of abrasive tools for the fine grinding technology.

Мгновенные контактные температуры при тонком алмазном шлифовании деталей из композитных материалов на основе отходов инструментальных сталей

The results of experimental researches of momentary contact temperatures which appear on the end of diamond grain’ cutting edge at fine grinding of friction pieces of new composite materials on the base of utilized and regenerated grinding alloy tool steels’ wastes of 86Х6НФТ, 5Х3В3МФС and 7ХГ2ВМФ with solid lubricant CaF2 additives have been presented in this article. It was studied that the influence of abrasives composition and cutting parameters on temperatures value.

Force Field at Fine Diamond Grinding of Friction Pieces From New Composite Alloys for Printing Machines

The research results concerning an influence of cutting forces rectangular components at fine diamond grinding of friction pieces from new composite materials on the base of grinding alloy tool steel wastes type of 86Х6НФТ, 4ХНМНФС and 5Х3В3МФС for heavy operating conditions of printing machines have been presented in this article.

he Influence of tool composition and Fine Diamond grinding parameters on surface Roughness of composite sliding bearings for printing machine

The article presents research results on the influence of tool composition and fine diamond grinding parameters on surface roughness of new composite sliding bearings for printing machines. We determine main regularities of surface roughness formation and their dependence on cutting parameters. We discover that granulosity, vehicle material of the diamond disc essentially influence surface roughness parameter Ra.

The Connection between Structural State and Wear-Resistance of Steels for the Detail’s Scraper Conveyer’s

The paper is devoted to establishing of connection between of hardness, wear-resistance and the nature of structure. It is used structural analysis, measuring of microhardness and wearing tests. It is conducted the comparison of wear-resistances speed, microhardness of three steels 30Г, 25ХГСР, А335/А335М grade P22 (ASTM) for the details of scraper conveyer, which subjected to wear during the exploitation. It is established on the frequency curve of hardness distribution, that most of grains in the steel 25ХГСР was great hardness.

Analysis of surfaces’ quality parameters of sliding bearings Made of composite alloys for printing machines at abrasive grinding

In the article we present the research results of defect layers formation on surfaces of sliding bearings made of new high-alloy composite alloys produced from tool steels wastes and intended for high-speed printing machines. We show that such quality parameters of surfaces like cold-work strengthening, depth of its bedding, and range of cold-work strengthening and distortions of the 2-nd type are formed as a result of interaction between force and temperature fields appearing on the top of abrasive grain at fine abrasive grinding of friction surfaces of sliding bearings.

The Choice of the Operation Mode of Wear-Resistant Details by Analyzing Friction Films

The bushing bearings based on wastes of АК12ММгН alloy are produced by powder metallurgy method. We analyze friction films formed on the surface of investigated bushing bearings samples ased on wastes of АК12ММгН alloy in the pair with counterface of teel 45 (45–48 HRCe) obtained as a result of tests on friction and wear. We utilize AVMT-1 friction machine to analyze tribotechnical properties of wear-resistant parts based on wastes of АК12ММгН alloy. We demonstrate that this brand new material based on wastes of АК12ММгН alloy has better antifriction properties than the cast material.

The Choice of Exploitation Parameters of Bearing Materials Based Made of Tool High-Speed Steel Based on the Friction Films Analysis

This study presents the research results of secondary structure films of bearing materials made of tool high-speed steels Р6М5, Р6М5К5, Р6М5Ф3 abrasive wastes with the solid lubricant CaF2. They are formed on the contact surfaces at friction under hard exploitation conditions and influence functional properties of the friction unit. We also demonstrate the possibility of forecasting the necessary level of antifriction properties by creating films of the required depth and chemical composition as well as justify setting the materials exploitation parameters.

The formation principles of structure and properties of composite antifriction materials on the base of steel wastes

The experimental results demonstrate the specificity of the metallographic structure formation of the physical-mechanical properties and tribotechnical characteristics of antifriction composite materials, based on the 5Х3В3МФС steel wastes with the high temperature solid lubricant CaF2 impurities. Furthermore, we show that a complex heterogeneous materials structure is formed in the sintering process, ensuring the high-level formation of antifriction composites operational properties.