The Effect of the Extrusion Temperature on the ...（挤压温度的影响。）.pdf

A study was conducted to determine the effect of the primarily on round bars3), and not much has been extrusion temperature on the recrystallized grain size reported concerning hollow profiles. This study aims and texture of an AA6005C alloy. Several extrusion tests to clarify the effect of the extrusion conditions on were conducted at temperatures from 753 to 793K at an the formation process of the recrystallization texture extrusion speed of 3m/min. A decrease in extrusion in a hollow profile of AA6005C (JIS 6N01)-T5 temperature from 793K to 753K was found to increase aluminum alloy. A study was conducted on the the average size of recrystallized grains from 170m to recrystallization textures of the hollow profiles, 230m and the volume fraction of cube-oriented extruded at various temperatures and T5 treated. recrystallized grains from 30% to 40%. A high- The following is an outline of the study. temperature compression test, conducted to elucidate the process of recrystallized grain formation, revealed that, 1. Experimental method compared with extrusion at 793K, extrusion at 753K yields fewer recrystallized grains immediately after the The tested samples were prepared from hollow deformation, indicating that a larger amount of energy is profiles made of an AA6005C (JIS 6N01)-T5. Their stored in the un-recrystallized region. The increased chemical composition and the process of producing the stored energy is considered to have promoted the samples are shown Table 1 and Fig. 1, respectively. preferential growth of the recrystallized Cube grains. Each billet, having a diameter of 155mm, was