Influence of vibratory-centrifugal strain hardening on surface quality of cylindric long-sized machine parts

Purpose: The objective of this work is to develop mathematical models based on experimental data that enables us to predict the values of physico-mechanical parameters of surface quality of MLSMP (microhardness, depth of hardened layer, level of hardening) when VCSH is applied. Design/methodology/approach: For all round studying of the effect of main technological factors on physico-mechanical parameters of MLSMP surface layer quality (microhardness, depth of hardening layer, level of hardening) it is expedient to use the method of factor planning with applying plane 2k, where k is the number of variation factors. Findings: The obtained empiric relations enable us to predict the values of physico-mechanical parameters of MLSMP made of alloyed steels (especially of 40XH2MA steel) depending technological parameters of VCSH, the parameters being within their ranges. Research limitations/implications: The effect of technological parameters of VCSH and that of constructional dimensions of the hardening device equipped with electromagnetic drive and elastic system parameters of MLSMP surface hardening qualities is ambiguous. Originality/value: The hardening devices equipped with electromagnetic drive and elastic systems for treating internal and external MLSD surfaces are designed to solve the problem.