Vertical ceramic mould housing for single crystal blade forming and forming method of ceramic mould housing

Abstract

The invention discloses a vertical ceramic mould housing for single crystal blade forming and a forming method of the ceramic mould housing. The ceramic mould housing is characterized in that the ceramic mould housing is erected above a chassis; a crystal selector and a plurality of supporting columns are arranged between the chassis and the ceramic mould housing; the supporting columns are arranged at the periphery of the crystal selector in a surrounding manner; and the supporting columns and the ceramic mould housing are molded integrally. The forming method of the ceramic mould housing comprises the steps that 1) a blade wax mould, a chassis wax mould and a crystal selection wax mould are manufactured; 2) the blade wax mould is assembled on the crystal selection wax mould, the crystal selection wax mould is assembled on the chassis wax mould, a plurality of supporting rods are arranged between the chassis wax mould and the blade wax mould, and arranged at the periphery of the crystal selection wax mould in a surrounding manner; and 3) and the ceramic mould housing is manufactured in a slurry dipping and sand leaching manner. According to the vertical ceramic mould housing and the forming method, reliable and stable supporting for the vertical ceramic mould housing is formed on the chassis, and the whole supporting structure is simple and compact, so that obstruction to heat transfer by radiation is avoided effectively, and the vertical ceramic mould housing does not affect crystal growth conditions of an alloy melt in unidirectional solidification.

Description

technical field [0001] The invention relates to a mold shell molding technology for precision melting and casting, in particular to a vertical ceramic mold shell for forming single crystal blades and a molding method for the ceramic mold shell. Background technique [0002] Single crystal blades are generally favored by industrial equipment because of their excellent structural properties. For example, single crystal turbine blades are used to improve the high temperature performance of aero engines and industrial gas turbines, etc. [0003] The blade is a slender part with irregular contours. In the precision casting of single crystal melting and casting, the ceramic mold shell for forming single crystal blades needs to be arranged vertically, which is especially obvious in the molding of large single crystal blades; In the ceramic mold shell, the sequential growth of single crystals of the alloy melt in the ceramic mold shell can be effectively realized, and the generation...

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned ceramic formwork structure can make it form a reliable and stable support structure, the chassis and support frame form a thick ceramic support frame on the periphery of the ceramic formwork, which has the following technical deficiencies: 1. The structure is bloated and complicated, and the molding process Time-consuming and material-intensive; 2. The thick support frame affects the radiation heat transfer in the directional solidification process at the periphery of the entire ceramic mold shell, thereby easily making the single crystal growth conditions of the alloy melt in the ceramic mold shell worse, affecting The finished product quality of single crystal blades has a low pass rate

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