Evanescent mode water-based paint for large alloy steel casting

Abstract

The invention discloses an evanescent mode water-based paint for a large alloy steel casting. The evanescent mode water-based paint comprises the following components in parts by weight: 30 45 parts of quartz powder, 7 17 parts of zircon powder, 5 10 parts of talcum powder, 10 15 parts of bauxite, 15 parts of synthetic mullite, 2 4 parts of perlite particles, 4 6 parts of sodium bentonite, 2 4 parts of sodium carboxymethyl starch, 1 3 parts of cassava starch, 0.5-1.5 parts of refractory fiber, and 1 3 parts of mica powder. The evanescent mode water-based paint for the large alloy steel castingovercomes the casting defect that there air holes in the surface due to poor air permeability of the paint and improves the low-temperature strength, high-temperature strength and high-temperature air permeability of a coating, thereby enabling the large alloy steel casting to meet the requirements for mass production.

Description

technical field [0001] The invention relates to a lost foam water-based paint for large alloy steel castings. Background technique [0002] Conventional lost foam casting (also known as solid casting) is made of EPS foam material to form a solid mold with the same structure and size as the part to be cast, dip-coated with refractory coating (for strengthening, smoothness, and ventilation) and dried Finally, it is buried in dry quartz sand and subjected to three-dimensional vibration modeling. The casting mold box is poured with molten metal under negative pressure, so that the polymer material model is heated and vaporized, and then it is replaced by liquid metal and formed after cooling and solidification. A new casting method for the production of castings by a new process of permanent shape casting. When this method is used to produce large steel castings, insufficient EPS combustion during the pouring process can easily cause carbonization on the surface of the steel ca...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the above technical problems, the present invention provides a lost foam water-based coating for large alloy steel castings, which solves casting defects such as surface pores caused by poor gas permeability of the coating, and improves the low-temperature strength, high-temperature strength, and high-temperature gas permeability of the coating. flexibility, so that large steel castings meet the needs of mass production