SURFACE LAYER STEEL DETAILS 45 AFTER STRENGTHENING BY BORING AND LASER TREATMENT

Abstract

The technologies of processing and strengthening of the surface layer of details from steel 45 are investigated in the work, which at the first stage provide restoration of surface geometry, drilling and laser processing of the drilled layer.  The analysis of structure formation of layered zones depending on technological methods of processing is carried out, the technique of definition of parameters of microhardness, elasticity, coefficient of plasticity of the corresponding local zones by means of the device "Micron-gamma" is developed.  Researches of physical and mechanical properties of working layers and microhardness are carried out.  According to the results of the research on the corresponding samples of parts made of steel 45, images of the microstructures of the working surfaces are obtained, tables and graphs of the distribution of the microhardness of the surface layer of the part are given.  The presented results prove the expediency of using the developed technologies of restoration and strengthening of a wide range of steel parts 45 in mechanical engineering.