DOI: 10.22213/2658-3658-2018-96-106

Article

Effect of Reinforcing Rolling on the Surface Properties of Products Made of Heat-Resistant Alloys

Shiryaev, А., Vinokurov, N., Trofimov, V., Karmanov, V., Shilyaev, А.

Abstract. The process of surface plastic deformation – hardening rolling by a ball is one of the most widespread processes of finishing machining products, allowing to obtain the required mechanical characteristics of the surface of products – hardness, strength, corrosion resistance and wear resistance. The results of the investigation of the effect of rolling modes on the characteristics of the surface layer of samples of high-temperature alloys VZhL14-VM and VZhM-4 are presented: the residual stresses, roughness, microhardness, and the depth of surface crushing. For rolling, a hydrostatic tool installed instead of a rotating assembly on a friction welding machine was used. The analysis of the results shows that the step and the scheme of the tool movement have the most significant influence on the residual stress level, microhardness and roughness. It is shown that, after rolling, the depth of the surface crushing after rolling increases slightly the geometrical dimensions of the samples. The microhardness of the surface is increased by 25–33 %, and the microroughness decreases by 2–4 times. After rolling in the surface layer, compressive residual stresses are recorded, reaching the maximum values in a direction perpendicular to the direction of movement of the tool.

Keywords: residual stresses, surface hardening, surface plastic deformation, roughness, microhardness, heat-resistant alloys

Pages: 96–106Total pages: 11

Published in: Instrumentation Engineering, Electronics and Telecommunications – 2018: Proceedings of the IV International Forum (December 12–14, 2018, Izhevsk, Russian Federation)

Year of publication: 2018