Process for preparing semi-solid state aluminum alloy scroll plate by radial forging strain induction method

Abstract

The invention discloses a process for preparing a semi-solid state aluminum alloy scroll plate by a radial forging strain induction method. The method comprises the following steps: pre-heating an aluminum alloy rods at first; performing radial forging on the aluminum alloy rods; performing secondary remelting on blanks subjected to radial forging; performing extrusion casting on the aluminum alloy scroll plate; performing T6 heat treatment on the aluminum alloy scroll plate acquired by extrusion casting in a semi-solid state to increase the mechanical property. According to the process, the aluminum alloy semi-solid state blanks which are uniform and free of microdefect are prepared and are subjected to extrusion casting to form a scroll plate workpiece with less microdefects and high mechanical performance, and the process is simple and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of metal semi-solid processing and forming, and particularly relates to a process for preparing a semi-solid aluminum alloy scroll by a radial forging strain induction method. Background technique [0002] The aluminum alloy scroll is the core part of the automotive air-conditioning refrigeration scroll compressor, including the movable scroll and the stationary scroll. The traditional scroll blank is processed by conventional processes such as low pressure casting, die casting, hot die forging, and back pressure forming. Among them, the scroll profile on the scroll is relatively complex, thin in thickness and deep in depth, resulting in a large machining allowance for the hot-die forging blank, and the mold forming load is large, the mold life is short, and the cost is high; low pressure casting The mechanical properties of the formed parts produced by the process and back pressure forming are poor, there ...

AI Technical Summary

Problems solved by technology

However, the conventional mechanical stirring method and electromagnetic stirring method have the following disadvantages: high temperature has a serious corrosion effect on the mechanical stirrer, and the corrosion residue will be mixed with the semi-solid slurry, resulting in impure slurry

However, when these methods prepare large blanks, the forming force required for large plastic deformation is too large, and it is difficult to realize with existing equipment.

Therefore, it is not possible to produce large-scale semi-solid blanks in large quantities, so it cannot be directly used to produce large and complex-shaped parts such as aluminum alloy scrolls.

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