Effect of Diversion Bridge on the Fracture Performance of Extrusion Fusion Joint of Multi Cavity Aluminum Profile
The chemical composition analysis,metallographic observation and mechanical property of the fusion joint fracture location was carried out.The research showed that under the action of large extrusion pressure,the ingot generated frictional force with the diversion bridge.The large friction force caused seri-ous grain breakage on the surface of the ingot.In the process of later heat treatment,the grains grew and formed coarse recrystallization,resulting in large particle morphology of the fracture in the fusion area.The large granular grains would reduce the mechanical properties of the fusion location,which should be strictly controlled in the actual production process.
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