Influence of Heating Friction Stir Spot Welding Process Parameters on Steel Aluminum Forming Quality

Abstract:

A lap welding experiment of DP590 steel and 6061 aluminum plate is carried out by using Heating Friction Stir Spot Welding (HFSSW) to study the influence of welding parameters on the forming quality. The results show that a lap joint with better forming can be obtained for the dissimilar metal of steel and aluminum. Under the condition that the rotating speed of the stirring tool is 1000r/min, the penetration depth, 0.2mm, the dwell time, 90s, the welding pressure, 0.2Mp, and the flow rate of cooling air, 20L/min, the forming quality of the surface of the joint line is good & bright, and the exit hole is also smaller. The mechanism of heat production is revealed in the following: the main heat is produced by the friction between the stirring tool shoulder and the welded part & between the probe and the welded part as well as by the latent heat resulted from the plastic deformation of the material in joint line during welding.

• Periodical: Materials Science Forum (Volume 917)
• Pages: 246-251
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.917.246
• Online since: March 2018
• Authors: Kai Xu*, Shu Quan Zhang
• Keywords: Forming Quality, Heating Friction Stir Spot Welding, Influence, Process

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