Microstructure of Joints Made of Duplex Steel LDX 2101 Using Concentrated Beams and Various Welding Rates

The article presents tests concerned with the welding of duplex steel LDX 2101 using a laser beam, an electron beam and various welding rates. Flat butt joints were made using the laser beam and welding rates of 1 m/min
and 2 m/min as well as the electron beam and welding rates of 0.2 m/min and 2 m/min. Microscopic metallographic examinations involved the use of light microscopy. The microstructure of individual areas of the test joints was revealed using colour electrolytic etching. Structural components in individual areas of the joints were identified using NIS Elements-AR software tools (Nikon). The same software was used for measuring the width of the joints and the height of excess weld metal. Test results were used to formulate related conclusions.