Hot die casting water-soluble ceramic core for light alloy investment casting and preparation method of hot die casting water-soluble ceramic core

Abstract

The invention discloses a hot die casting water-soluble ceramic core for light alloy investment casting and a preparation method thereof, the hot die casting water-soluble ceramic core comprises fused corundum powder, potassium sulfate, a plasticizer, a lubricant and a surfactant in a weight ratio of (60-80): (7.7-30): (10-15): (1-2): (1-2), and the hot die casting water-soluble ceramic core comprises paraffin, beewax, polyethylene, stearic acid and oleic acid in a weight ratio of (90-95): (2-4): (2-4): (1-2): (1-2). A hot die-casting forming method is adopted for forming, and then high-temperature sintering is conducted. According to the hot die-casting ceramic core, the refractory aggregate and the inorganic salt are adopted to form a base material of the ceramic core, compared with an existing salt core, the hot die-casting ceramic core has the advantages of being high in stability and precision, the use amount of water-soluble salt is reduced, and good water-soluble collapsibility is kept; and the hot die-casting forming process is adopted for manufacturing, so that the requirements of actual production on cores with complex shapes can be met.

Description

technical field [0001] The invention relates to a hot die casting water-soluble ceramic core for light alloy investment casting and a preparation method thereof, belonging to the field of investment casting precision. Background technique [0002] With the rapid development of industries such as automobiles, aviation and ships, the demand for load parts and structural parts with complex structures is increasing, which puts forward higher requirements for casting production. The use of aluminum and magnesium light alloy investment castings instead of composite parts helps to improve the reliability of the equipment, but it also makes the structure of the castings more complicated, which brings certain difficulties to the casting production, especially for thin and thin parts with complex structures. For wall castings, the selection and application of the core used to form the inner cavity is the key to obtaining quality castings. Aluminum and bit alloys have low strength, an...

AI Technical Summary

Problems solved by technology

[0005] Water-soluble ceramic cores can be manufactured by a variety of forming processes, but different methods have their own limitations, such as compression forming, which is suitable for the manufacture of simple core shapes; slip casting, which can be used for the manufacture of complex shape cores, but Because the slurry contains a lot of water, it has the disadvantages of drying, sintering, and large shrinkage; hot die casting can be used for the manufacture of complex shape cores, but it also has the disadvantage of long production cycle

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