A special-shaped sprue cup for high-temperature alloy casting and its forming method

Abstract

The invention provides a special-shaped sprue cup for high-temperature alloy casting and its forming method. With an eversion edge, the sprue cup body includes a first buffer arc, a first slag blocking area, a second buffer arc, a second slag blocking and a third buffer arc, the first buffer arc Starting from the valgus edge on the right side, the third buffer arc area ends to the valgus edge on the left side, the first buffer arc area and the third buffer arc area are both convex arc surface structures, the second buffer arc area The area is a concave arc surface structure, the inlet of the sprue cup is set on the upper end surface of the sprue cup body, and the outlet of the sprue cup is set at the junction of the third buffer arc area and the second slag blocking area. The sprue cup of the present invention has a larger pouring range; multiple arc buffers play the role of stabilizing the flow, reducing splashing and turbulent flow of molten steel, improving the pouring quality of castings, and reducing the generation of pores and porosity.

Description

technical field [0001] The invention belongs to the field of high-temperature alloy investment casting, in particular to a special-shaped pouring cup for high-temperature alloy casting and a forming method thereof. Background technique [0002] Superalloys (casting temperature around 1400°C and service temperature between 700-800°C) have bearing capacity in an environment close to the melting point, and have the ability to resist mechanical degradation after long-term service. Features such as the ability to serve over time are called superalloys or heat-strength alloys by researchers. High-temperature alloys have a high degree of alloying, and often contain a variety of trace elements in them. Now, vacuum melting technology and precision investment casting technology are mostly used. As an indispensable part of the superalloy casting process, the sprue cup plays the role of stabilizing the flow, blocking the slag, and filtering the slag inclusion. In the actual vacuum pou...

AI Technical Summary

Problems solved by technology

In the process of making the sprue cup by investment casting, the sprue cup body is often eccentric due to the special-shaped structure. During the coating process, it will rotate under the action of gravity during the clamping period of the manipulator, which will easily cause damage to the mold shell and make it difficult to paint. mechanized operation

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