Fe2O3 Nanowire Flux Enabling Tungsten Inert Gas Welding of High-Manganese Steel Thick Plates with Improved Mechanical Properties

Economic welding of thick steel plates is an emerging challenge for various engineering applications. However, tungsten inert gas (TIG) arc welding, as economic and widely used method, not regarded a suitable tool to weld due the shallow penetration in single-pass operation. In this technical progress, joining austenitic high manganese 8 mm thickness was successfully performed using nanowire flux activated TIG with full narrow bead geometry. Fe2O3 compared microscale flux. Experimental results showed that fluxes, yielded maximum more than (full melt over plate) proper operating parameters single pass. sharp contrast, only less 4 pass without similar parameters. Arc voltage—time variation during process analyzed angular distortion measured after understand activating effect optimized mixture. Compared joint flux, nanoscale has larger voltage higher energy efficiency, strength distortion. The developed qualified tensile test 700.7 MPa (82.38% base material strength) 34.1% elongation. This work may pave way nanotechnology-enabling innovation application.