Welding austenitic steel to copper with the defocused radiation of a fibre laser

Selected from Svarochnoe Proizvodstvo 2017(4) 7–11

Abstract

Special features of producing butt welded joints between 12Cr18Ni10Ti austenitic steel and M1 copper by laser welding are investigated. Welding was carried out without filler or intermediate material. The defocused beam of the fibre laser, displaced to the austenitic steel, was used. The welded joints in dissimilar materials produced in the selected conditions were without defects and their strength was comparable with the M1 copper parent metal. The tensile tests and hardness measurements were carried out on the resultant welded joints. The microstructure of the welded joints was investigated and the transition zone was examined by chemical analysis.

Keywords:

• Fibre laser welding
• dissimilar metal joints
• copper
• austenitic steel
• mechanical properties
• microstructure

Notes

Selected from Svarochnoe Proizvodstvo 2017(4) 7–11