Numerical Simulation On Pressure Forging Of Ring Component At Near Solid State

Ring component is a kind of key components widely used in the important equipments in the fields of petrochemical, mechanical,power, aeronautics and astronautics and so on. In traditional ring component production process, the procedure and production period is relatively longer, and the production cost is higher. The cast-rolling complex forming process proposed by our research team has the characteristics of short procedure, lower power consumption, high efficiency and better forming microstructure, etc., and it will has a wide expanding and application prospects. As the first procedure in this process, the manufacturing of the ring component billet is of great importance, which is an important guarantee for the subsequent rolling process.Firstly, Q235 B is selected as the research material; the original microstructure of the material is obtained by experiments, and the physical parameters are set up. The Finite element numerical simulation model of the ring component is established utilizing three dimensional modeling software Pro-E. The cooling solidification process of the liquid metal and relative microstructure evolution condition is simulated with the micro simulation module of Pro CAST. The influence of the pressure, casting temperature and die temperature on the solidification process is obtained. And the process parameters of the ring component pressure forming at near solid state are optimized.It can be known from the numerical simulation that, with the conducting of the pressure solidification process, the liquid phase flows and feeds the shrinks.The solid phase moved and deformed under pressures and the flowing ability and filling effect of the metal has been improved to ensure the extrusion feeding effect, and it is favorable for the enhancement of the microstructure and property of the component. At near solid state, the influence of the parameters such as the pressure of the punch, the preheating temperature of the die, and the casting temperature of the metal liquid on the solidification time decreased in turn. Inwhich, the influence of the pressure is the most important. On the process of loading, the original state of the liquid metal has a close relationship with the final microstructure of the forming component, especially the microstructure variation of the dendrites and the compression feeding effects. Under a solid volume fraction of about 30%(the temperature in the middle intersection area between the forming component and the concave die is about 1455? and the solidification time is about 5s), the obtained microstructure of the component is the most uniform, fine and dense.Through the numerical simulation on the pressure forming process of the ring billet under near solid state, the influence of the process parameters on the solidification process and the forming property is explored from macro and micro aspects, reasonable category of the process parameters has been determined, which will provide a reference for the production and further research.