Special-shaped sprue cup for high temperature alloy pouring and forming method thereof

Abstract

The invention provides a special-shaped sprue cup for high temperature alloy pouring and a forming method thereof. The special-shaped sprue cup comprises a sprue cup body, a sprue cup inlet, a sprue cup outlet and a supporting plate. An outer flange is circularly arranged on the periphery of the top end of the sprue cup body. The sprue cup body comprises a first arc-shaped buffer area, a first slag stopping area, a second arc-shaped buffer area, a second slag stopping area and a third arc-shaped buffer area. The first arc-shaped buffer area starts from the outer flange on the right side. The third arc-shaped buffer area is ended to the outer flange on the left side. The first arc-shaped buffer area and the third arc-shaped buffer area are both of an outward-protruding cambered surface structure. The second arc-shaped buffer area is of an inward-recessed cambered surface structure. The sprue cup inlet is formed in the upper end face of the sprue cup body, and the sprue cup outlet is formed in the connecting position of the third arc-shaped buffer area and the second slag stopping area. According to the sprue cup in the invention, the pouring range is made wider; and the multiple arc-shaped buffer areas play a flow stabilization effect, splashing and turbulence of molten steel are reduced, the pouring quality of castings is improved, and air holes and looseness are further reduced.

Description

Technical field [0001] The invention belongs to the field of high-temperature alloy investment casting, and in particular relates to a special-shaped sprue cup for high-temperature alloy casting and a forming method thereof. Background technique [0002] Superalloys (casting temperature is about 1400℃, service temperature is between 700-800℃) have load-bearing capacity in an environment close to the melting point, and have the ability to reduce mechanical resistance after long-term service. It will grow in harsh environments. The ability to serve time and other characteristics are called super alloys or thermally strong alloys by researchers. Superalloys have a high degree of alloying and often contain a variety of trace elements inside. Nowadays, vacuum melting technology and precision investment casting technology are mostly used. As an indispensable part of the superalloy pouring process, the sprue cup plays the role of stabilizing flow, blocking slag, and filtering slag incl...

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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