Carbon-nanofiber-enhanced light low-carbon-residue water-based paint for evaporative-pattern casting and manufacturing method thereof

Abstract

The invention relates to the technical field of evaporative-pattern casting, in particular to a nano-calcium-carbonate-enhanced low-carbon-residue water-based paint for evaporative-pattern casting and a manufacturing method thereof. According to the water-based paint, high-aluminum fine powder, magnesia and brown corundum powder which are different in particle sizes are mixed to serve as a refractory aggregate, so that the water-based paint has good air permeability and high-temperature stability; a mixed suspending agent prepared from nano calcium carbonate, sodium carboxymethylcellulose and other materials can be well mixed with inorganic powder and resin emulsion, so that the fluidity and coating property of the paint are improved effectively, and dimensional stability to heating is enhanced and improved; added nano ceria has oxygen storage capacity, and oxygen can be released in the casting process, so that the oxidative combustion efficiency of plastic is improved, and carbon residues are reduced. Moreover, a coating layer produced from the manufactured paint is stable in performance when heated, not prone to collapsing and breaking, compact and breathable and capable of being stripped off and removed easily; and the number of impurities on the surfaces of manufactured castings is smaller, and quality of the manufactured castings is better.

Description

technical field [0001] The invention relates to the technical field of lost foam casting, in particular to a water-based coating for lost foam casting with nano-carbon fiber reinforced light and low carbon residue and a preparation method thereof. Background technique [0002] Lost foam coating refers to a layer of special coating applied to the outer surface of the pattern during the lost foam casting process. It plays a key role in the casting process. Since the pattern is made of foam, the permeability of the coating , coating strength, rheology and other properties will have a crucial impact on casting products, and the lost foam coating with excellent performance should meet: (1) It can help improve the strength and rigidity of the foam pattern, and prevent the pattern from being damaged and deformed. ; (2) It has an isolation function, separates the molten metal from the model, prevents the molten metal from infiltrating into the dry sand, and prevents the formation of...

AI Technical Summary

Problems solved by technology

[0003] The composition of lost foam coatings mainly includes refractory aggregates, adhesives, solvents, suspending agents and various additives. According to the nature of the binder used, it is mainly divided into water-based coatings, alcohol-based coatings, resin coatings, etc. Among them, water-based coatings are widely used in actual production because of their low cost. However, water-based coatings are easy to collapse and stick to sand when the coating is cleaned, and most of the products still have defects in the performance of the products. described effect