Effect Of Annealing Process On Microstructure And Mechanical Properties Of 3003 Aluminum Alloy

Aluminum materials have an extensive application resulting from their super performances, and the requirement for quality and properties of which to meet the demands of social development. Aluminum alloy 3003 which was studied in this paper is usually used to produce components of good processability. For its shortage of bad process quality of stamping and earing ratio as the key indexes which are difficult to fulfill their requirements of deep drawing, the microstructure and mechanical behavior of Aluminum alloy 3003 at different annealing temperatures and insulation time were examined by optical electron metalloscope, scanning electron microscopy and mechanical property tester. And the optimal parameters of heat treatment process for batch production were obtained associated with the influence of intermediate annealing on mechanical behavior after final-annealing process.The following is the main conclusion.(1) The recrystallization temperature of 3003 aluminum alloy sheet is nearly 360℃and mechanical behavior changes greatly at this temperature. The complete recrystallization temperature is about 460℃, and when reach or excess 460℃, the mechanical property is stabilization. Grain growth in 3003 aluminum alloy sheet is observed as the holding time increasing after annealing treatment at the same temperature.(2) The maximum tensile strength and yield strength, minimum elongation rate of aluminum alloy sheet along the rolling direction are observed after annealing treatment. And in the vertical rolling direction, the data is the secondary. when the rolling directional angle is 45°, minimum tensile strength and yield strength, maximum elongation rate are found.(3)When treated by high speed and high temperature intermediate annealing, then recrystallization annealing after cold rolling, the sheet shows stronger recrystallization texture than treating by conventional annealing. And it is superior to refine the grain structure of aluminum alloys, improve the texture configurations of cold rolled sheet and comprehensive mechanical properties after O-state annealing, decrease anisotropy value and earing ratio, the mechanical property of aluminum alloy sheet are satisfactory.