Abstract: For changing the poor plasticity and low elongation of the aluminum alloy at room temperature, based on the characteristics of aluminum alloy solid solution treatment, a solid solution forming method was investigated. In order to obtain optimum process parameters of the 6016-T6 aluminum alloy solid, tensile strength at different heating temperatures, heat preservation time and different cooling methods were measured by the electronic tensile testing machine and the influence of different process parameters on the mechanical properties were analyzed. The results show that the cooling speed has great influence on microstructure and properties of the materials. When the solution technological parameter is 550 ℃×5 min, water cooling, the tensile strength can reach maximum values, which are more than 300 MPa. The above process parameters have been used to test and verify the lower cross beam of the rear windshield made of the aluminum alloy, and the hot formed parts are trial-produced and qualified, and the tensile strength of these parts could reach 308 MPa.

Key words: 6016 aluminum alloy, microstructure, beam connector, mechanical properties