Assessing the Weld Quality of Manganese Steel

Abstract

The welding of alloy steels in practice is a difficult process in order to achieve mechanically or chemically resistant high-quality welds. In some cases, the weldability of many materials can be difficult or is not recommended because of poor and unsuitable properties of welded joints. In our research work, we investigate the selection of an appropriate welding method for welding the manganese steel HS 20 used at dynamically strained components in the car industry. The welding methods have been selected from accessible methods of the KARRER, s.r.o. Tovarníky industrial plant. Based on the comparable welding technologies MMA, MIG/ MAG and TIG, we tested and verified the quality of welds by means of selected weld tests. The quality of these welds, obtained by the abovementioned methods, was evaluated by weld tests in laboratory conditions of the Department of Quality and Engineering Technologies (Slovak University of Agriculture in Nitra) in cooperation with NDB, s.r.o. Bratislava and SES Tlmače, a.s. The aim of the research work is to set the most suitable and effective method of welding for given components from all the technologies available in the mentioned industrial plant. Based on relevant information, we also want to enrich the scope of knowledge about welding of manganese materials in order to make the welding process more effective.

Quality evaluation of welding joints by different methods

“…porosity, the need to remove slag, the impossibility of automation and mechanization, an increased percentage of harmful substances and lower occupational hygiene. Figure 1 shows the principle of MMAW [6,7]. Tungsten Inert Gas (TIG) welding uses the heat generated by a welding arc struck between a nonconsumable electrode (using a non-consumable electrode made of pure or activated tungsten) and welded material.…”

“…100 -Crack, 101 -Longitudinal crack). Subgroup specifying the welding defects in more detail are indicated by 4-digit numbers (1011 -Longitudinal crack in the weld metal, 1014 -Longitudinal crack in the parent metal) [7,11,13]. Figure 4 shows typical types of defects of the weld joints [14].…”

“…To obtain a high quality of the weld joints means to harmonize a suitable filler material to the base material, alto to design a suitable welding method as well as welding conditions and quality of welders in accordance with applicable European standards [16,7].…”

Titanium and Stainless Steel MIG LSC Welding

“…Traditional welding method of MIG to weld manganese steel was attempted by Bernát et al (2013), but weld quality was not optimal. Therefore, innovative welding method MIG LSC was selected for the purposes of this experiment, which was designed by Fronius in order to increase the quality of welded joints.…”