White corundum powder coating method

Abstract

The invention provides a method for brushing white alundum powder paint, and the method comprises the following steps of: 1, preparing the white alundum powder paint with a baume degree of 76-84 [Be], carrying out primary brushing of the white alundum powder paint on a surface layer of a sand cavity, lighting the white alundum powder paint immediately after brushing is completed, and then coolingto a room temperature; 2, preparing the white alundum powder paint with the baume degree of 52-58 [Be], carrying out secondary brushing of the white alundum powder paint on the surface layer of the sand cavity, lighting the white alundum powder paint 30-60 seconds after the brushing, and then cooling to the room temperature; and 3, preparing the white alundum powder paint with the baume degree of42-50 [Be], carrying out tertiary brushing of the white alundum powder paint on the surface layer of the sand cavity, lighting the white alundum powder paint 30-60 seconds after the brushing, and then cooling to the room temperature so as to complete the brushing, thereby ensuring that a brushed coating layer cannot generate air bubbles after being lighted and preventing a casting from being subjected to sand fusion.

Description

technical field [0001] The invention relates to a coating method of a coating, in particular to a coating method of a white corundum powder coating suitable for the surface layer of a sand mold cavity. Background technique [0002] In the prior art, zircon powder paint is usually applied to the surface of the sand mold cavity, so that the sand mold cavity can play a role in high temperature resistance during pouring, and avoid sand inclusions and blisters in the casting caused by sand washing during pouring. With the development of the nuclear industry, the price of zirconium materials is becoming more and more expensive, and the price of zircon powder coatings is also rising rapidly, which greatly increases the production cost. The material cost of the white corundum powder coating with aluminum oxide as the main body is much lower than that of the zircon powder coating with zirconia as the main body. The use performance and brushing performance of the white corundum powder...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, zircon powder paint is usually applied to the surface of the sand mold cavity, so that the sand mold cavity can play a role in high temperature resistance during pouring, and avoid sand inclusions and blisters in the casting caused by sand washing during pouring. With the development of the nuclear industry, the price of zirconium materials is becoming more and more expensive, and the price of zircon powder coatings is also rising rapidly, which greatly increases the production cost.

The material cost of the white corundum powder coating with aluminum oxide as the main body is much lower than that of the zircon powder coating with zirconia as the main body. The use performance and brushing performance of the white corundum powder coating are similar to the zircon powder coating. However, there are also differences. During the brushing process, the brushing concentration of each layer is not prepared well. After brushing and ignition, bubbles will be generated, and castings will produce serious sticky sand.