Research into the possibilities for the improvement of a number of operational properties using wave strain hardening

The paper states the need to identify a processing method through which increased operational properties in the work material can be obtained within a single process step. To solve the raised problem, the use of wave strain hardening (WSH) technology is proposed. The peculiarity of the technology lies in the possibility of simultaneous control of a number of technological parameters and the effect on the processed material of prolonged shock pulses characterized by the transfer of impact energy to the deformation site of more than 65%. Due to the presence of a large number of controlled process variables, the WSH allows fine adjusting of the uniformity of hardening and forming hardened areas at a depth of up to 15 mm. Due to the fine adjustment of the uniformity of hardening it becomes possible to avoid the formation of excessive cold work hardening of the surface layer and it makes great difference between WSH and other dynamic methods of surface plastic deformation, for example, stamping. With uneven hardening of WSH, solid and viscous regions take regular turns in the surface layer, forming a heterogeneous structure. The analysis of literature sources has shown that the presence of such areas in the surface layer makes it promising for purposes of operational properties improvement. The paper presents the results of experimental studies of the effect of the heterogeneous structure created by WSH on the operational properties: resistance to contact staining; cyclic strength under alternating loads, corrosion resistance. Laboratory studies of operational properties were carried out both using production equipment and specially designed facilities. The results obtained indicate the prospects of using WSH for operational properties increase and the existence of a "universal" operation mode.