Simulation Study on Stepwise Rolling Forming Process of Large Step Rings
As a key component in wind power,aerospace and other fields,the preparation quality and efficiency of the large ring forgings have become important factors in the industry's development. To address the precise rolling of step rings,in this paper,a combined method of thermal simulation experiments and numerical simulations is adopted to study the thermal deformation behavior of Q345E steel with different process parameters,and analyze the flow laws of metals with different rolling methods. The results indicate that the stress-strain curve exhibits dynamic recrystallization characteristics when the deformation temperature exceeds 1100℃. The optimal deformation process parameters are found to be a temperature range of 1050～1250℃ and a strain rate of 0.1～1 s-1 . Especially,aiming at the forming of large inner step rings,a new stepwise rolling method is proposed to gradually generate axial wall thickness difference in rectangular billets.
step ringsthermal simulation experimentnumerical simulationstepwise rolling
万方数据
维普
