Modification of the ferrous and nonferrous metals in the process of pinch discharges in the water vapor

Abstract

Characteristics of a prospective method of modification of the structural-phase state and properties of materials in the process of pulsed electrical charges in water are given. Experimental results of the structural- phase changes in steels A-35, 30Kh3NMAF, and 45Kh2MFA and nonferrous metals (copper, titanium, and lead) under periodic discharge in a stream of fluid (PDSF) are presented. Formation of a compression wave with instant transition into an expansion wave creates strong local deformation and warm-up in the processed materials accompanied by formation of domains similar to metal pins in automotive rubber; rebuilding of the material structure and change in the phase state take place. The scope and extent of these changes with a fixed PDSF is determined by the nature of the alloy composition and susceptibility to structural transformations under level of pulsed exposure. Recommendations are given for the PDSF application for hardening of the material of various products, which extends the technological capabilities of modern engineering.