A precision casting method for a solid duplex single crystal guide vane

Abstract

The invention discloses a precision casting method for a solid double single crystal guide vane. The precision casting method includes the steps that a wax mold of the solid double single crystal guide vane, a spiral crystal selector, a crystal guiding block and a runner system are pressed; the start end of the spiral crystal selector is connected with a chassis, the spiral end of the spiral crystal selector is connected with the crystal guiding block, the crystal guiding block is combined with a vane pot side edge plate of a vane wax mold, a feeding block and the vane pot side large edge plate of the vane wax mold are connected together, a crystal guiding strip is connected between the crystal guiding block and a vane pot side small edge plate of the vane wax mold, and an inner runner connects a runner plate and the top end of a mounting plate of the small edge plate of the vane wax mold to form a solid double single crystal guide vane wax mold module; the vane wax mold module is coated with refractory coating layer by layer and then dewaxed and sintered to form a molded shell; and the molded shell is used to prepare the solid double single crystal guide vane. The precision casting method solidifies a vane single crystal structure sequentially, the precision casting molding of the solid double single crystal guide vane is realized, and the crystal defects of the vane can be effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of precision casting of turbine blades of aero-engines, and in particular relates to a precision casting method of solid double-connected single-crystal guide vanes. Background technique [0002] Turbine blades are one of the most critical hot-end parts of aero-engines. The application of single-crystal alloy turbine blades has significantly promoted the increase of engine efficiency and the advancement of aero-engine technology. Single-crystal turbine blade manufacturing technology is one of the key core technologies in the development of aero-engine technology. Aviation powers such as Britain and the United States have been investing a lot of resources in the development of single-crystal turbine blade technology. Turbine blades are generally divided into working blades and guide vanes. The guide vanes exist as stator parts, and their structures are relatively complex. In order to further improve turbine e...

AI Technical Summary

Problems solved by technology

Therefore, the technical demand for single-crystal duplex guide vanes is becoming stronger and stronger, and the newly designed engine turbine guide vanes tend to be prepared by duplex molding. However, due to the complex structure and large volume of duplex guide vanes, single-crystal Metallurgical defects such as miscellaneous crystals, porosity, and recrystallization are easily caused during the crystal preparation process. The precision casting method involved in the duplex guide vane is the main factor affecting such defects. Therefore, mastering the precision casting method of the duplex guide vane can effectively solve the problem. Joint guide vane preparation problem

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