Shape-following chill and manufacturing technology thereof

Abstract

The invention provides shape-following chill and a manufacturing technology thereof. The shape-following chill is composed of the following components of, by weight, cut steel wire shot, chromite sandand a binding agent, wherein the ratio of the weight of the cut steel wire shot, the ratio of the weight of the chromite sand and the ratio of the weight of the binding agent is 9 to 1 to 0.02-0.03.The manufacturing technology of the shape-following chill comprises the following steps that a, the raw materials of cut steel wire shot and the chromite sand are mixed according to the ratio; b, water glass with concentration of 52 baume degree is added after the raw materials are mixed, then mixing and uniformly stirring are carried out; and c, the mixture is directly paved on a to-be-used pieceafter the mixing is finished, carbon dioxide is blew to enable the to-be-used piece harden, and then the shape-following chill manufacturing is completed. The shape-following chill and the manufacturing technology thereof have the advantages that the manufacturing of the manufactured shape-following chill is simple and convenient, the production period is shortened, and inclusion defect of castings is eliminated.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a shape-compliant cold iron and a preparation process thereof. Background technique [0002] In order to increase the local cooling rate of the casting, the metal objects or other chilled objects placed in the sand mold, the surface of the sand core or the cavity are called cold iron. Cold iron can be used in various casting alloys, especially steel castings. The cold iron is used in conjunction with the riser to strengthen the sequential solidification of the casting, improve the feeding efficiency of the riser, and prevent the casting from shrinking or shrinking; accelerate the local cooling rate of the casting, so that the casting tends to solidify at the same time, preventing the casting from being deformed and porosity. Cracks; accelerate the cooling of some special parts of the casting to achieve the purpose of refining the matrix structure and improving the surface hardne...

AI Technical Summary

Problems solved by technology

[0003] At present, the follow-up chill iron process used in the casting production process of automobile panel molds is a whole piece follow-up chill iron. The main disadvantages are that the processing cycle is long (about 7 days), and the operation is difficult for workers (the weight of a single piece is about 10- 20kg), it is easy to damage the continuity of the surface refractory coating at the transfer position, causing the coating to break and enter the casting, forming inclusion defects, and in severe cases, the product will be scrapped