Laser Spot Welding a Three-Layered Panel in Different Spatial Positions

Abstract

The aim of the work is a comparative analysis of structural features and mechanical characteristics of spot welded joints of thin-sheet stainless steels 03Х11Н10М2T and 12Х18Н10Т, produced by laser welding in different welding positions. The change in the welding position from vertical to flat allowed extend the ranges of variation of welding modes from about ±5% to about ±10%, at which it is possible to produce a welded joint with satisfactory shape and mechanical characteristics. Higher strength is typical for welded joints obtained in a flat position. It also concerns the maximum value of the shear stress, which for the flat position is higher by approximately 10%, and the average value, which is higher by approximately 24%. In addition, the results of mechanical shear tests of these joints have a significantly lower dispersion.

Microstructure Characterization and Mechanical Properties of Laser Welded Super High Strength QP980 Automotive Steel

“…Some scholars have published their research work on laser-welded QP steels. The research content focuses on the performance of same or dissimilar welded joints between QP steel and QP steel/special steels [7,8].…”