Microwave casting method

Abstract

The invention discloses a microwave casting method. The microwave casting method comprises the following steps of powdering a microwave absorption heating material; mixing the powdered microwave absorption heating material with a main material to form a mixed material; placing the mixed material into a cavity of a sand mold; adopting microwaves with various frequencies to heat the mixed material,and heating the mixed material by means of the microwave absorption heating material to ensure that the mixed material is molten or partially molten and the cavity is filled with the mixed material; and then, performing cooling crystallization to form a product. According to the microwave casting method, steps of the casting process are reduced, so that bubbles, cracks and other defects in a casting process can be avoided. In a microwave heating process, microwave energy is absorbed by the material itself and converted into kinetic energy and potential energy of internal particles, so that integral uniform heating is realized, a temperature gradient does not exist inside, and such defects as internal stress of the product can be reduced. The microwave casting method utilizes the microwavesfor heating, so that the heating time is shortened, the heating effect is improved, and defects of a traditional casting method can be avoided.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a microwave casting method. Background technique [0002] Casting is a casting method that produces castings in molding sand. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. [0003] The molding materials used in sand casting are cheap and easy to obtain, and the casting mold is easy to manufacture. It can be adapted to single-piece production, batch production and mass production of castings. It has been the basic process in casting production for a long time. The process of sand casting includes: making wooden molds - foundry molding - melting - pouring - sand falling - pouring, riser cleaning - inspection and storage. The mold used in sand casting is generally composed of an outer sand mold and a core. The basic raw materials for making sand molds are foundry sand and sand binder. [0004] In the traditional pouring process, a very high tem...

AI Technical Summary

Problems solved by technology

[0004] In the traditional pouring process, it is necessary to reach a very high temperature when melting the pouring material. During the cooling process, due to the inconsistent crystallization temperature, it is easy to produce grain segregation and cause defects such as shrinkage cavities in the product.

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