Investigation on welding of wire mesh by pulsed microplasm arc welding with one-pulse-one-wire mode

Abstract

One pulse one wire mode was proposed for butt welding ultrafine 304 stainless steel wire mesh by pulsed microplasma arc welding. The weld morphologies and the resultant microstructure and mechanical properties were investigated. The results show that with an increase in duty ratio, the weld tends to vary from quasi-spherical to elliptical-spherical welds. However, the change tendency of welds is opposite when peak current rises. The microstructures in weld zone are γ austenite and δ ferrite, and grow and increase with a rising in duty ratio at peak current 2.2 or 2.4 A though refine in the δ ferrite at peak current 2.6 A. The weld with peak current 2.2 A and duty ratio 30% performs the better mechanical properties.

Keywords

• ultrafine wire mesh
• microplasma arc welding
• pulse parameters