In this paper,the influence of different ageing time on microstructure,tensile properties and bending properties of 6005A al-uminium alloy profiles at low ageing temperature was studied,and the causes were analyzed.The test results show that with the exten-sion of ageing time,the number and dispersion of atomic aggregation state increase,while the supersaturation degree of solid solution in matrix decreases gradually.The yield strength and tensile strength of the sample increase gradually with the extension of ageing time,but the elongation after fracture decreases gradually.These changes are closely related to the changes of microstructure.In addition,with the extension of ageing time,the bending angle of the sample decreases gradually.This is related to the microstructure changes of phase precipitation near grain boundaries,hard phase formation and dislocation movement.In the actual production process,the appro-priate ageing time can be selected according to the specific product requirements.
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