Anti-deformation process of wax mold for high-temperature alloy turbine rotor

Abstract

The invention relates to the field of wax mold precision casting, in particular to an anti-deformation process of a wax mold for a high-temperature alloy turbine rotor. Before the wax mold of a product is pressed, a cold wax core conforming to the shape of the wax mold product is pressed, and the shape of the cold wax core is corrected so as to control the size of the wax mold; the wax mold is pre-filled with the cold wax core, the self temperature of the cold wax core is low, a chilling effect is achieved on wax materials, and therefore the cooling speed of the wax mold is increased, and theproblem of serious deformation of thick and large parts of the wax mold is solved; and meanwhile, during wax mold pressing, due to the fact that grooves and through holes are formed in the surface ofthe cold wax core, the wax materials can be tightly combined with the cold wax core, the position of the cold wax core in the wax mold is fixed, dislocation is not prone to happening, and uniform shrinkage of the wax mold is guaranteed. Finally, after the wax mold is taken out, the wax mold is placed on a shape correcting tool, and shape correcting is carried out on a turbine rotor blade through gravity. By means of the method, the size of the wax mold can be accurately controlled, and therefore castings with the sizes meeting the requirement are obtained.

Description

technical field [0001] The invention relates to the field of wax mold precision casting, in particular to a wax mold anti-deformation process for a superalloy turbine rotor. Background technique [0002] Superalloys are the preferred metal material systems in complex service environments in the field of aerospace and military equipment. The organizational performance, structural size and service life of the manufactured products directly determine multiple performance indicators such as the service life, manufacturing cost, structural reliability, and weight design coefficient of the weaponry. Therefore, investment casting technology is the technical basis for the development of advanced aerospace weapons and equipment, commercial aerospace, civil aviation and other fields with long life, low cost, lightweight, and precision forming. [0003] The process route of investment precision casting is: wax mold forming - wax mold combination - shell making - dewaxing - gravity cas...

AI Technical Summary

Problems solved by technology

During the development of the turbine rotor, it was found that if the design of the cold wax core and the shape calibration tool is unreasonable, it will still cause the size of the casting to be out of tolerance, which will seriously affect the pass rate

[0006] To sum up, with the continuous development of investment casting technology, especially the continuous increase in the size requirements of castings, the traditional cold wax core design and shape correction tooling are difficult to meet the use requirements

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