Casting heating coating and preparation method thereof

Abstract

The invention discloses a casting heating coating and a preparation method thereof, and belongs to the casting industry. The heating coating comprises the following components in percentage by weight: 25 to 35 percent of monatomic silicon powder, 20 to 25 percent of iron oxide red, 8 to 10 percent of a binder, 6 to 10 percent of a suspending agent, and the balance of alcohol. The preparation method comprises the following steps of fully stirring and uniformly mixing the materials, and preparing into a coating or a block. By applying the heating coating disclosed by the invention, the problem that the interior of a complex casting cannot be fed can be effectively solved, especially when a blind riser cannot be arranged or a chilling block is not suitable to be arranged; the problem that the interior cannot be subjected to shot-blasting grinding is solved; for iron castings, part of white cast problems can be solved; meanwhile, the coating is low in cost, does not recarburize, does not generate other gases, and does not cause the problems of recarburization and pores on the surface of steel casting; and the coating is natural after being excited, and the lasting time can be randomly adjusted according to the process requirements.

Description

technical field [0001] The invention belongs to the foundry industry, and in particular relates to a casting heating coating and a manufacturing method thereof. Background technique [0002] Casting coatings are generally used to improve and overcome defects such as sand sticking, sand inclusions, and pores in the molding sand during the solidification process of the castings. The coating layer is used to isolate the direct contact between the metal liquid and the molding sand, so as to achieve dense and smooth castings. Due to special process requirements, some castings with complex inner cavity need to use a heat-generating coating to achieve the best effect. [0003] In addition to the advancement of technology, the way of installing risers or chilled irons on some hot spots of castings in the past is also subject to many limitations. Because some castings have very complex cavities, chilling coatings cannot be used to improve them, especially grinding and cleaning are ve...

AI Technical Summary

Problems solved by technology

[0003] In addition to the advancement of technology, the method of installing risers or chilled iron in some hot spots of castings is also subject to many limitations. Because some castings have very complex cavities, chilling coatings cannot be used to improve them, especially grinding and cleaning are very difficult.