Experimental Investigations on Friction Welding of Dissimilar Metals

Abdelfattah Bilal Abdelsalam, Mohammed Misbah Ridwan

Abstract


A modified lathe machine was used as a direct drive friction welding machine to weld similar specimens of high speed steels, similar specimens of carbon steels, high speed steel to carbon steel , pure copper to carbon steel, and aluminum to pure copper. The steel specimens were welded at different friction pressures, at each friction pressure, the friction time and the total upset were measured, and the specimens were heat treated. Specimens of pure copper to carbon steel and aluminum to pure copper were welded at constant friction pressure; the friction time and the total upset were measured. All the specimens were subjected to tensile tests. The study revealed that, the optimum friction pressure for steel specimens was 25 bar. It also revealed that an excellent joint efficiency was obtained by welding of similar specimens of carbon steels, a satisfactory joint efficiency was obtained by welding of high speed steel to carbon steel, a poor joint efficiency was obtained by welding of similar specimens of high speed steels, a good joint efficiency was obtained by welding of copper to carbon steel, a very weak joint was obtained by welding of copper to aluminum.

Keywords


Friction welding; Friction pressure; Friction time; Joint efficiency

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References


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