The influence of extrusion die angle on the deformation force and hardness of AA6061 aged aluminum section

Die angle has a great influence on the product quality and extrusion force. In this research, the influence of die angle on extrusion force and hardness distribution in AA 6061 alloy was investigated. The 6061 aluminum billets were initially reheated and then extruded by different die angle molds and finally artificially aged. The half die angles of 30°, 45° and 60° in a single facet molds and 60° and 30° in a two facet mold were employed in extrusion experiments. The results show that the sample surfaces of extruded rods with all die angles mold have the most value of hardness. Meanwhile, by increasing the half dies angle, the hardness gradient form sample surface to its inside increases. In two facet mold, the change in die angle from 60° to 30° results in deformation homogeneity and increasing in extrusion force. However, the mold with 45° die angle requires the minimum force for pressing.