Authors: RakhimyanovKh.M., RakhimyanovK.Kh., EryominaA.S. , Al-ObaidiLuayMohammedRajab

Title of the article: Ultrasonic strengthening of surface layer of steel 20 formed in electrolyte-plasma heating conditions

Year: 2018, Issue: 2, Pages: 76-83

Branch of knowledge: Mechanical engineering and machine science

Index UDK: 621.789

DOI: 10.26730/1999-4125-2018-2-76-83

Abstract: The efficiency of ultrasonic plastic deformation of the surface layer of steel 20 after cementation and thermohardening during electrolyte-plasma heating is shown. Based on research using mathematical plan-ning, a regression equation is obtained that establishes the correlation between the microhardness and the regime parameters of ultrasonic plastic deformation – speed, feed and static force. It is established that the use of ultrasonic plastic deformation in the formation of the surface layer after chemical-thermal treatment in electrolyte plasma increased microhardness from 6000 MPa to 8000 MPa, and also formed a specific regular microrelief on the surface. Optimization of the regime parameters of ultrasonic plastic deformation providing maximum microhardness increase is carried out.

Key words: ultrasonic plastic deformation microhardness microrelief cementation mathematical planning

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