Cast-infiltration method for improving surface corrosion resistance of casting

Abstract

A cast-infiltration method for improving surface corrosion resistance of a casting comprises the following steps that firstly, titanium-nickel alloy particles, polyvinyl butyral and ethyl alcohol are weighed and mixed to form a composite coating, and then the casting cavity is coated with the composite coating and corresponds to the part, with the abrasion resistance to be improved, of the casting. The casting thickness ranges from 6 mm to 8 mm. After coating is finished, the composite coating is ignited, the composite coating is cured and bonded into the casting cavity, then the casting is placed in a casting tank, and the casting tank is inflated with argon. A metal base body to be poured is melted to the set temperature, then the molten metal base body is poured in the casting for pouring, and after natural cooling, a titanium-nickel particle strengthened metal base composite material is obtained. The cast-infiltration method is high in operability and simple in technological process, precious metal is effectively saved, and the production cost of the industry is reduced.

Description

technical field [0001] The invention relates to a casting infiltration method, in particular to a casting infiltration method for improving the corrosion resistance of the casting surface. Background technique [0002] Corrosion of cast iron or cast steel materials in sea-like climates, especially when working in harsh conditions such as seawater, high temperature, high humidity, high smog, and high sunlight, damage due to corrosion occurs from time to time. At present, scientific and technological workers usually add modified alloy elements to the cast iron or cast steel materials used to improve their high temperature resistance and corrosion resistance, but this greatly increases the cost of parts. [0003] The use of Zn-Al alloy anti-corrosion cast-infiltrated layer is one of the effective methods for corrosion protection of steel structures, but in practical applications, Zn-Al cast-infiltrated layer must be sealed with synthetic coatings to prevent the gaps that penetr...

AI Technical Summary

Problems solved by technology

[0005] At present, the process methods of titanium-steel composite mainly include the following: ①explosive welding method; due to the difficulty in welding between different metals; ②diffusion welding method has been transplanted to produce titanium-steel clad plate joints; With the rapid development, the size requirements for titanium-steel clad plates are getting bigger and bigger. The products produced by the above two production methods are difficult to meet the market demand. In order to expand the size of clad plates, scientific and technological workers have developed explosion-rolled titanium-steel clad plates The production process; but the production cost of this process is high, it is easy to cause pollution, and the yield is low