The Effect of the Structural State of AISI 321 Stainless Steel on Surface Quality During Turning

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Introduction. The development and continuous improvement of methods, technologies and equipment for the implementation of severe plastic deformation (SPD) helps to reduce the cost of producing ultrafine-grained (UFG) materials with improved physical and mechanical properties. Thereby, such materials become more accessible for use in full production of various objects. Cutting, and in particular turning, is the most common method of manufacturing products. However, at the moment there is a lack of information about the influence of the structural state of UFG materials on the qualitative characteristics of the surface after turning. The purpose of the work: to study the effect of structural conditions in AISI 321 stainless steel on the quality of its machining during turning. In this work, samples of AISI 321 stainless steel in the state as received and after structure formation are investigated using modern metal-cutting tools and equipment, as well as recommended cutting conditions. The methods of investigation are mechanical tests for compression and tension, transmission electron microscopy, optical metallography, laser scanning microscopy. Results and discussion. Based on the obtained experimental data, it can be concluded that SPD is an effective way to improve the quality of surface machining when turning AISI 321 stainless steel. For example, structure formation using SPD significantly reduces the roughness parameters of Sa and Sz. For better cutting quality and strength, rolling after ABC pressing is more efficient. The obtained results indicate a great potential for using of products from bulk UFG materials in industry due to the possibility of combining high mechanical properties and quality of dimensional machining. The data obtained can be applied in the design of technological processes for the machining of AISI 321 stainless steel with an ultrafine-grained structure under conditions of full production engineering.

About the authors

S. N. Nikolay

Email: shamarin.nik@gmail.com
Institute of Strenght Physics and Materials Sciences SB RAS, 2/4, pr. Akademicheskii, Tomsk, 634055, Russian Federation, shamarin.nik@gmail.com

F. V. Andrey

Email: Andrey.V.Filippov@yandex.ru
Doctor of Philosophy, Institute of Strenght Physics and Materials Sciences SB RAS, 2/4, pr. Akademicheskii, Tomsk, 634055, Russian Federation, Andrey.V.Filippov@yandex.ru

S. Yu. Tarasov

Email: tsy@ispms.ru
D.Sc. (Engineering), Institute of Strenght Physics and Materials Sciences SB RAS, 2/4, pr. Akademicheskii, Tomsk, 634055, Russian Federation; National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk, 634050, Russian Federation, tsy@ispms.ru

P. A. Oleg

Email: poa-3@mail.ru
National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk, 634050, Russian Federation, poa-3@mail.ru

U. R. Veronika

Email: filaret_2012@mail.ru
Institute of Strenght Physics and Materials Sciences SB RAS, 2/4, pr. Akademicheskii, Tomsk, 634055, Russian Federation, filaret_2012@mail.ru

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