Hollow blade ceramic core material, preparation method thereof and method for manufacturing hollow blade ceramic core by using material

Abstract

The invention discloses a 3D printed hollow blade ceramic core material, a preparation method thereof and a method for manufacturing a hollow blade ceramic core by using the material. The preparationmethod is characterized in that modifier zirconite is added into a traditional 3D printing pure silicon oxide ceramic formula; therefore, the high-temperature performance of the 3D printing silicon oxide ceramic product is obviously improved; the average high-temperature bending strength is improved from 6.72 Mpa of pure silicon oxide to 24.76 Mpa after heat preservation is conducted for 30 min atthe temperature of 1340 DEG C, the soda boiling core removal effect of the hollow blade ceramic core made of the material is further optimized, and the soda boiling core removal time of a turbine blade is shortened from about 30 days to 2 days.

Description

technical field [0001] The invention belongs to the technical field of precision casting and relates to a precision casting mold, in particular to a hollow vane ceramic core material, a preparation method thereof and a method for making a hollow vane ceramic core with the material. Background technique [0002] For the cooling structure of new turbine blades, the development trend is hollow blades with double-walled cooling structures. The feature of this cooling blade structure is that there are a large number of small cold air passages in the double wall, which creates a large heat exchange area inside the blade, thereby improving the cooling effect. For the preparation of this kind of hollow blade with double-wall cooling structure, the key is to prepare a ceramic core that meets its requirements. The traditional method of processing ceramic cores is hot press injection molding. The traditional hot press molding process first needs to open a mold. The mold cycle is 2 to ...

AI Technical Summary

Problems solved by technology

It is relatively easy to remove cores from pure silica ceramic cores, but it is relatively difficult to remove cores from pure alumina ceramic cores. Taking turbine blades as an example, the core removal time of pure silica ceramic cores is usually about 2 days, while that of pure alumina ceramic cores Core removal is very difficult

However, the high temperature resistance of pure silica ceramic cores is not as good as that of pure alumina ceramic cores. When casting workpieces with high temperature requirements such as turbine blades, pure silica ceramic cores are difficult to meet the requirements

It can be said that the cores of two different materials have their own advantages and disadvantages, and they cannot be balanced