.7050 Aluminum Alloy Semi-continuous Casting Process Of The Main Parameters Match

The solidification process of semi-continuous casting was a complex nonlinear process, which referred to the complicated geometric nonlinearity, material nonlinearity, and many other factors. The implementation of semi-continuous casting process involved many factors, equipment conditions and the environment combination and precise control. The solidification of semi-continuous casting process of round and flat aluminum alloy ingots was researched by the numerical simulation and some experimental methods, the controlling and adjusting methods was found to obtain a good quality ingot without any defects.Firstly, the research developments about high-strength aluminum alloys and the numerical simulation were summarized. The finite element method of the temperature field in the process of casting solidification was analyzed and the temperature field, flow field, stress field and micro structurefinite element theory in the solidification of semi-continuous was conduced.Secondly, the basic principles of mile algorithm was introduced which is used in a simulation software Procast for half-continuous modeling. The heat transfer boundary conditions of the semi-continuous casting process was analyzed and the three-dimensional Temperature-Flow-Stess coupling model and Temperature-Flow-Organization coupling model were built in the semi-continuous casting solidification process with mile algorithm, the law of temperature field, flow field, stress and organization changes in the solidification process were studied; The temperature field, solidification, stress field and organizations, as well as the distribution of Sump shape under different conditions were analyzed, then the casting cracks were discussed with the crack criterion of heat cracking potential and crack index, and the optimal process in accordance with the results of the analysis was designed.Thirdly, the effect of ultrasonic on the ingot microstructure was simulated approximatly by the exploration of ultrasonic on the nucleation rate and the law of grain size of ingot in different process parameters was analyzed. Semi-continuous casting for ultrasonic was test, the law of grain size ofφ300mm round ingot of 7050 aluminum alloy by the ultrasonic power and the casting speed was discussed.