Forming method of cobalt-based high-temperature alloy multi-step large special-shaped ring

Abstract

The invention discloses a forming method of a cobalt-based high-temperature alloy multi-step large special-shaped ring. The forming method comprises the following steps: firstly, adopting drawing software to assist the preparation of an intermediate ring blank, and putting the intermediate ring blank in a ring rolling mill for rolling; during rolling, elevating a worktable top where the intermediate ring blank is located by 5mm-10mm to enable a main roller to contact with a lower end of the intermediate ring blank firstly and guarantee the filling of a die cavity with a metal material starting from bottom to top, thereby gradually completing the formation of all the steps, and then bulging the rolled multi-step large special-shaped ring. Such a method is capable of forming the multi-step large special-shaped ring, and also capable of effectively avoiding a phenomena of rib deviation or rib crossing during the formation of the multi-step large special-shaped ring, thereby improving the properties of the forging. The method is suitable for the formation of the cobalt-based high-temperature alloy multi-step large special-shaped rings.

Description

technical field [0001] The invention relates to a forming method of a multi-step large-scale special-shaped ring, in particular to a forming method of a cobalt-based superalloy multi-step large-scale special-shaped ring. Background technique [0002] Special-shaped ring forgings are designed according to the contour of the part, which can effectively improve the utilization rate of materials, obtain ideal performance and streamlines that match the contour of the part. However, in reality, the shape of parts is often strange, and it is difficult to design completely according to the outline of the part. It can only be designed as a special-shaped ring forging that is similar to the cross-section of the part and is relatively simple. Compared with the rectangular ring forging, this method uses more materials. Although the rate has increased, the amount of improvement is limited. At present, most of the special-shaped rings formed by rolling are simple special-shaped rings, fo...

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Problems solved by technology

For complex multi-step special-shaped rings, when this method is used for forming, the forming effect will be seriously affected due to the unreasonable design of the blank or the mold, or the unreasonable matching of the blank and the mold during the rolling process.

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