Influence of Gas Dynamic Processes on Chemical Composition of Hardfaced Layer when Restoring Machine Parts Manufactured from 40H Steel

Abstract

The authors study the influence of active shielding gas dynamics on the process of hardfacing with flux-cored wire by single-jet and two-jet gas shielding. Research results into the properties of a hardfaced layer on structural steel 40H obtained by flux-cored welding are presented.

Effect of Heat Treatment on the Structure and Properties of Titanium Alloy VT22 Welded Joints Produced by TIG-Welding with Flux-Cored Wire

“…Experiments were carried out on the plates of titanium alloy VT22, 8 mm, with edge gap of 45°. Correctly chosen welding parameters in combination with a reliable power source provide a decisive influence on the heat content of the weld pool, reducing the level of residual stresses in the heat-affected zone (HAZ) [10]. The experimentally determined welding parameters (I w = 200-220 A, U arc = 13.0-13.5 V, V welding = 7-9 m/ph, V wire = 30 m/ph) were restricted within the range of parameters related to the welding of 8 mm thick alloy VT22.…”