Preparation method of large-size aluminum alloy flat ring piece

The invention provides a preparation method of a large-size aluminum alloy flat ring piece, which comprises the following steps: heating an aluminum alloy cast ingot, cogging, chambering, machining and rolling to obtain the large-size aluminum alloy flat ring piece. According to the method, the large-specification flat ring piece can be successfully rolled by adopting a proper blank making size and a proper rolling process, and the large-specification aluminum alloy flat ring of 5 meters or above can be successfully prepared through the technical scheme provided by the invention. 本发明提供了一种大规格铝合金扁平环件的制备方法，包括：将铝合金铸锭加热、开坯、扩孔、机加工、轧制，得到大规格铝合金扁平环件。本发明采用合适的制坯尺寸及轧制工艺可成功轧制出大规格扁平环件，通过本发明提供的技术方案可以成功制备出5米级以上的大规格铝合金扁平环。