Preparation method for metal-ceramic composite tube

Abstract

The invention discloses a preparation method for a metal-ceramic composite tube, which comprises the steps of: 1, removing the oil stain of the inner wall of a metal tube; 2, removing the roll scale of the inner wall of the metal tube and exposing a fresh metal substrate; 3, filling the mixture of powder-shaped ceramic grains and a pyrophorus in the metal tube; 4 sealing the two ends of the tube the inside of which is fully filled with the ceramic grains and the pyrophorus, wherein one end of the tube is provided with a fuse lead in wire and the other end is provided with a waste gas exhaust hole; the fuse lead in wire and the pyrophorus are communicated; 5, clamping the metal tube and leading the metal tube to rotate at a certain rotational speed; 6, igniting the fuse lead in wire and then using the fuse lead in wire to ignite the pyrophorus to burn and give out heat to fuse the powder ceramic grains in the tube to be in a shape of a liquid which is closely adhered to the inner wall of the tube under the effect of a rotating centrifugal force and uniformly coated on the inner wall of the tube; and 7 grinding and finishing the inner hole of the tube. The method uses the heat generated by self-propagating combustion reaction to fuse the ceramic materials; the rotating centrifugal force leads the solid materials to be closely adhered to the wall of the tube to form a firm inner wall melting ceramic layer, thus ensuring the ceramic layer not to fall off in longer use and prolonging the service life of the ceramic layer.

Description

technical field [0001] The invention relates to a method for manufacturing a metal-ceramic composite pipe, in particular to a method for manufacturing a metal-ceramic composite pipe with a high-performance metal-ceramic composite layer on the inner wall. Background technique [0002] With the development of science and technology, the manufacturing industry is also advancing by leaps and bounds, especially military industries such as aerospace, as well as pressure vessels, nuclear reactors, oil pipelines, and chemical pipelines all require the inner wall of the pipe to be resistant to high temperature, erosion, radiation, and corrosion. performance ceramic coating. As we all know, general ceramics (including cermets) have high hardness and high wear resistance, but general ceramic materials are very brittle and difficult to shape and process. Therefore, it is difficult to rely on a single ceramic tube and a single metal tube to withstand the above-mentioned working conditio...

AI Technical Summary

Problems solved by technology

The main disadvantage of this production method is that the combination of the wire mesh and the inner wall of the pipeline is not tight, the thickness of the wire mesh lining is not uniform, the process is complicated, and the cost is high.