Manufacturing method of self-propagating ceramic composite steel pipe

Abstract

The invention discloses a manufacturing method of a self-propagating ceramic composite steel pipe. The manufacturing method comprises the following steps that 1) a steel pipe is prepared, wherein thewall thickness of the prepared steel pipe is larger than that of the self-propagating ceramic composite steel pipe; 2) an internal thread is milled in the inner wall of the steel pipe in a thread milling mode; 3) an internal thread with the spiral direction opposite to that of the internal thread milled in the step 2) is milled in the inner wall of the steel pipe in a thread milling mode; 4) the inner wall of the steel pipe subjected to step 3) is ground through a grinding wheel grinder, and the surfaces of the threads milled in the steps 2) and 3) are roughed through grinding; and 5) zeoliteis grounded into powder by using a dry grinding mode, iron oxide powder, metal oxide powder and aluminum powder are added into the zeolite powder, and the powder is uniformly stirred to form a self-propagating powdered material I. According to the technical scheme, a transition layer and a ceramic layer in the steel pipe can have good connection strength, the wear resistance of the ceramic layer can be improved, and the performance of the ceramic composite steel pipe can be improved.

Description

technical field [0001] The invention relates to a method for manufacturing a self-propagating ceramic composite steel pipe, which belongs to the field of wear-resistant steel pipes. Background technique [0002] Self-propagating combustion ceramic composite steel pipe is made by advanced self-propagating high-temperature centrifugal synthesis process. The pipe is composed of three layers of corundum ceramics, a transition layer and a steel body from the inside to the outside. The ceramic layer is dense corundum porcelain formed at a high temperature above 2200 degrees. The ceramic layer is combined with the inner wall of the steel pipe through the transition layer. The process adopts the method of self-propagating centrifugal casting, which mainly uses the chemical reaction of the substance itself, exothermic combustion to generate high temperature, and the technology of synthesizing new substances in the process of spreading the combustion wave. Due to the wear resistance,...

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Problems solved by technology

In the prior art, although the sintering temperature in the self-propagating combustion process is relatively high, exceeding the melting point of the steel pipe, because the self-propagating combustion reaction time is relatively short, less steel is melted on the inner surface of the steel pipe during the self-propagating combustion reaction time. The transition layer is only bonded to the inner surface of the steel pipe, resulting in a low connection strength between the ceramic layer formed by the self-propagating combustion reaction and the inner surface of the steel pipe, which reduces the service life of the self-propagating combustion ceramic composite steel pipe

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