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Aluminum metallurgical quality for domestic cans are generally better than the foreign poor, key performance indicators difficult to meet the canning, red cans requirements on the status quo, start with aluminum inherent metallurgical quality improve and enhance the cans, the first time the use of efficient melt processing The technical preparation cans with aluminum. Optical metallographic microscope (OM), environmental scanning electron microscopy (ESEM) of XRD, DTA and mechanical properties testing modern analytical and observational approaches, more in-depth system of processing of cans by efficient melt aluminum in different states ( cast, rolling state, homogenization and intermediate annealing state) under microstructure and mechanical properties of variation, analysis of the effect and mechanism of metallurgical defects, a comprehensive comparison and combination of conventional melt processing and finished sheet at home and abroad, The best heat treatment process to optimize the test conditions. The main findings are as follows: an efficient melt processing can significantly improve the cans with the metallurgical quality of the aluminum, rare earth (RE) of Fe-rich metamorphism, it was short bones or small spherical intragranular two-phase diffusion precipitation, which directly affect the cast fracture under way, compared with untreated, tensile strength and elongation increased by 16.6% and 90.2%, respectively. Homogenizing annealing, efficient melt processing of cans with aluminum grain boundary at the second phase ball effect is more obvious, the the best homogenization annealing process: 450 ~ 500 ℃ insulation 12 ~ 15h, air-cooled. Compared with the conventional melt processing technology, the optimization process can be achieved by lower homogenization temperatures or shorter holding time the ideal homogeneous state, the second phase a small rounded, comprehensive mechanical properties superior to conventional melting body and help to reduce the energy consumption in the production process. Efficient melt processing cans with aluminum recrystallization temperature and speed up its recrystallization nucleation rate, the intermediate annealing optimization process: 430 ° C insulation for one hour, air-cooled. Under this condition, and then the crystalline grain structure of fine equiaxed uniform degree of plastic anisotropy of the sheet plane of the lowest, the fracture mode of the material microvoid accumulation of transgranular fracture mainly, with a more suitable hardness and mechanical properties . 4, under the experimental conditions, efficient melt processing cans of aluminum in metallurgical quality superior to domestic and foreign products, compared with the domestic plate, increased by 9.1% and 19.6%, respectively, a δ by 12.8%, the main mechanical properties of the basic meet or slightly more than a foreign plate level of performance is expected to meet the tank requirements.
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