Method for preparing wax mold of monocrystal spiral crystal selector

Abstract

The invention provides a method for preparing a wax mold of a monocrystal spiral crystal selector. The wax mold of the monocrystal spiral crystal selector comprises a seeding section wax mold, a spiral crystal selecting section wax mold and a transition section wax mold which are sequentially connected from bottom to top. The method comprises the following steps: firstly, manufacturing the seeding section wax mold and the transition section wax mold; winding on a screw corresponding to the size of the required spiral crystal selecting section by a plastic welding rod, sizing for a moment, immersing into 58# refined paraffin liquid at 68 DEG C, taking out after 4-7 seconds so as to obtain the spiral crystal selecting wax mold; connecting two ends of the spiral crystal selecting wax mold with the bottom of the transition section wax mold and the top of the seeding section wax mold respectively by utilizing bonding wax which is heated to be 130 DEG C. According to the invention, the crystal selector wax mold which meets the requirement can be prepared rapidly; compared with the traditional method using a wax injector and a wax mold, the method has the characteristics of no need of wax injector equipment, no need of machining the wax mold, low expense, simplicity in operation, short consumption time, high efficiency, high yield and the like.

Description

technical field [0001] The invention relates to the field of investment precision casting, in particular to a method for quickly preparing a wax mold of a spiral crystal selector in the wax mold manufacturing stage in the investment precision casting process of single crystal castings. Background technique [0002] Due to their excellent high-temperature mechanical properties, high-temperature alloys have become the preferred materials for the design of advanced aero-engines and heavy-duty gas turbine blades, and these blade casting blanks are generally prepared by investment casting. For single crystal blade castings, the "crystal selection method" is mostly used in industrial production. In this process, the crystal selection process and crystal selection efficiency have a very important impact on the grain orientation and yield of the final single crystal blade, which is closely related to the geometric size of the crystal selector in the spatial direction. Therefore, th...

AI Technical Summary

Problems solved by technology

For crystal selector wax molds, the traditional method is usually to use rubber molds or metal molds to press them on a wax press machine, which requires large-scale equipment such as wax press machines, and the molds for spiral crystal selectors are also very complicated, especially the price of metal molds is very high. , and the whole preparation process is cumbersome and the work efficiency is not high

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