การเชื่อมฟริกชันสเตอร์อลูมิเนียมผสมเกรด A5083 และเหล็กกล้าคาร์บอนเกรด SS400

Abstract

This paper proposes an application of a friction stir welding to butt-weld an aluminum alloy plate to a low carbon steel plate. The effects of pin rotation speed, position of the pin axis and pin diameters on tensile strength and microstructure of the joint were investigated. Butt joint welding of an aluminum alloy plate was easily and successfully achieved. The maximum tensile strength of the joint was about 86% of that of the aluminum alloy base metal. Many fragments of the steel were scattered in the aluminum alloy matrix and a fracture tended to occur along the interface between the fragment and the aluminum matrix. A small amount of intermetallic compound was also often formed at the interface between the steel fragments and the aluminum matrix. The regions where the intermetallic compounds formed seemed to be fracture paths in a joint.