Anti-scaffolding composite coating

Abstract

The invention discloses an anti-scaffolding composite coating which is characterized by comprising at least three layers of sub-coatings, which are respectively an alloy layer coated on the surface of a base body, a first metal ceramic layer coated on the surface of the alloy layer, and a second metal ceramic layer coated on the surface of the first metal ceramic layer. The anti-scaffolding composite coating provided by the invention has the properties of resisting abrasion, high temperature, oxidation, thermal shock, scaffolding and the like; the quality of a steel plate manufactured by a furnace roller sprayed with the coating is greatly improved.

Description

technical field [0001] The invention relates to an anti-nodulation composite coating. Background technique [0002] In recent years, with the rapid development of China's economy, we are facing the transformation and upgrading from products with high energy consumption, high cost and low value-added to products with low energy consumption, low cost and high value-added. Among them, with the improvement of living standards, the demand for automobiles in China has increased significantly. Production bases for high-end and high-end cars have been established in China one after another, and the demand for high-end automobile sheets is also increasing, making high-end cold-rolled steel sheets become the main source of automobile sheets. raw materials. This puts forward higher requirements for the production equipment of steel plate. [0003] As the core component of the steel plate continuous annealing furnace, the furnace roll is in the harsh working environment of high temper...

AI Technical Summary

Problems solved by technology

Due to the long-term exposure of the furnace roll in the furnace, although there is gas protection, the possibility of oxidation is still relatively high. After the surface of the furnace roll is oxidized, the surface roughness will also change accordingly, which is very important for the manufacture of high-quality steel plates. unfavorable

Since an appropriate amount of reducing gas should be filled in the work, the iron oxide or manganese oxide on the surface of the steel strip will be reduced to iron, manganese and other metals, and iron, manganese and furnace roller materials (mostly heat-resistant stainless steel) have Strong affinity and mutual solubility, easy to adhere to the roll surface to form accumulation, difficult to remove manually, must use tools such as files, time-consuming and labor-intensive

Moreover, as the working temperature of the furnace roller increases, nodules and wear also increase, and the sliding between the furnace roller and the steel plate will also promote the formation of nodules

Nodules will cause the steel plate to slide over the roller surface, leaving pits, strains, scratches and other defects on the steel plate, thus affecting the quality of the steel plate

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