Casting method for engine turbine guide vane

Abstract

The invention relates to a casting molding method of an engine turbine guide vane, comprising the following steps: preparing a self-curing slurry by using fused silica sand, needle-shaped petroleum coke, silica sol and solidified materials; and painting the self-curing slurry on the outer surface of a mold shell At the position corresponding to the thin-walled tip of the engine turbine guide vane; the mold shell is naturally air-dried and then poured into the mold shell to melt the alloy material in a liquid state, and the engine turbine guide vane is obtained after the alloy material is solidified. By adopting the technical solution of the present invention, by painting the self-curing slurry on the outer surface of the mold shell, the thickness of the mold shell at this area is increased, and the heat dissipation in this area can be reduced when the alloy material smelted into liquid is poured into the mold shell The speed reduces the difference in heat dissipation speed between this area and other areas, effectively prevents under-casting and loose defects at local locations, improves the molding quality and product qualification rate of castings, and avoids or reduces the number of repairs to castings in the later stage.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a casting method for an engine turbine guide vane. Background technique [0002] In the process of casting molding process, firstly, the mold shell should be prepared according to the shape of the product, and then the metal material smelted into liquid state should be poured into the mold shell. After the metal material is condensed, it will be cast into shape. With the continuous development of casting technology, the shape of the casting The structure is becoming more and more complicated. When casting engine turbine guide vanes, the shape of the blades is a curved surface, and the wall thickness is uneven. When pouring the molten metal material into the pre-prepared shell, the corresponding The heat dissipation speed is not uniform, which leads to inconsistent filling speed of metal materials, and the filling is prone to dissatisfaction in local areas, which leads to under-c...

AI Technical Summary

Problems solved by technology

[0002] In the process of casting molding process, firstly, the mold shell should be prepared according to the shape of the product, and then the metal material smelted into liquid state should be poured into the mold shell. After the metal material is condensed, it will be cast into shape. With the continuous development of casting technology, the shape of the casting The structure is becoming more and more complicated. When casting engine turbine guide vanes, the shape of the blades is a curved surface, and the wall thickness is uneven. When pouring the molten metal material into the pre-prepared shell, the corresponding The heat dissipation speed is not uniform, which leads to inconsistent filling speed of metal materials, and the filling is prone to dissatisfaction in local areas, which leads to under-casting defects, affects the quality of casting molding, and is not conducive to improving the product qualification rate. In addition, when increasing the metal material The pouring temperature is easy to produce loose defects on the surface of the casting, which often requires additional processing and grinding, which increases the labor intensity of workers

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