Sand-casting alloy steel casting process

Abstract

The invention discloses a sand-casting alloy steel casting process, and belongs to the technical field of metal material casting. The sand-casting alloy steel casting process comprises the following steps: S1, producing a die which is made from a nonmagnetic material; S2, uniformly mixing 100 parts by weight of metal sand and 2-4 parts by weight of vegetable oil adhesive to prepare molding sand; S3, arranging the die in a sand box, and then filling the molding sand until the box is full to form a casting mold; S4, forming a sprue and a riser, and closing the box; S5, heating the sand box; andS6, injecting molten alloy metal into the casting mold, and after the molten alloy metal is solidified to form a casting, carrying out sand shakeout treatment and shot blasting treatment. According tothe sand-casting alloy steel casting process, the metal sand casting mold and inclined casting are adopted, a cavity is high in stability, mold filling is stable, and the occurrence of slag inclusioncan be reduced; and moreover, the exhaust of the casting mold is facilitated, air hole defects are reduced, and the casting is high in mechanical property.

Description

technical field [0001] The invention relates to the technical field of metal material casting, in particular to a process of sand casting alloy steel castings. Background technique [0002] Sand casting refers to the casting method of producing castings in sand molds. The casting molds used in sand casting are generally composed of outer sand molds and cores; steel, iron and most non-ferrous alloy castings can be obtained by sand casting alloy steel castings. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is easy to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings. It has been the basic process in casting production for a long time. At present, 60-70% of castings are produced by sand molds in the world. However, since the molding material in sand casting is sand, its overall property is soft and porous, so the sand mold made of it has poor stability and is easy t...

AI Technical Summary

Problems solved by technology

However, since the molding material in sand casting is sand, its overall property is soft and porous, so the sand mold made of it has poor stability and is easy to collapse and deform. The pouring process needs to be very careful, and a little carelessness will lead to sand mold damage and pouring failure. Especially in the case of larger castings, longer castings, and higher casting precision requirements, the traditional sand casting process has certain difficulties; secondly, the thermal conductivity of sand molds is small, which is likely to cause coarse grains, loose structures, sand holes, pores, etc. Numerous defects, resulting in lower mechanical properties of castings