A rapid casting method for steel-based wear-resistant and corrosion-resistant coatings based on 3D printing

Abstract

A 3D printing-based rapid casting preparation method for a steel-based wear-resistant and corrosion-resistant coating belongs to the technical field of metal-based composite material preparation. In the present invention, nickel-based alloy powder, WC powder, TiC powder, ferrochrome powder and flux are mixed evenly, and an appropriate amount of dispersant is added to the prepared premix, and the mixture is evenly stirred to obtain low-viscosity, high-solid content Coating slurry, the metal slurry and the wax-based mold material are printed synchronously and partitioned by a composite dual-nozzle 3D printing device to obtain a casting prototype wax model with a wear-resistant and corrosion-resistant coating in a specific working area of ​​the casting, and the model is shell-made and demolded , high-temperature roasting and other investment casting processes, after pouring high-temperature molten steel, cooling and post-processing, precision castings with wear-resistant and corrosion-resistant coatings on the steel base surface can be manufactured. The castings produced by the invention have high dimensional accuracy, good surface quality of the wear-resistant and corrosion-resistant coating, and are metallurgically combined with the steel substrate, which not only ensures the toughness of the substrate material during use, but also improves the high wear resistance and durability of the service area. Corrosion, so that the casting has better comprehensive performance.

Description

technical field [0001] The invention relates to a preparation method for rapid precision casting of a steel-based wear-resistant and corrosion-resistant coating based on 3D printing. In particular, it relates to the preparation method of rapid precision casting of steel-based wear-resistant and corrosion-resistant coatings using investment precision casting technology, cladding coating and multi-nozzle 3D printing technology, and belongs to the technical field of metal matrix composite material preparation. Background technique [0002] With the progress of the preparation process and the needs of industrial applications, a variety of preparation processes for steel-based surface composite materials have been developed. It is an economical and effective means to improve wear resistance and at the same time endow parts with special functions such as high temperature resistance, corrosion resistance, fatigue resistance, radiation protection, electrical conduction, magnetic con...

AI Technical Summary

Problems solved by technology

However, the traditional investment casting method requires molds or machining to manufacture investment patterns. The production process is complex, the development cycle is long, the manufacturing cost is high, and the manufacturing accuracy is not easy to control. Especially, it is extremely difficult to make investment patterns for parts with complex shapes. It consumes a lot of manpower, material and financial resources, and it is difficult to realize the rapid manufacture of complex precision castings, which directly affects the efficiency of product development