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Method for producing ceramic-lined aluminum alloy pipe

A technology of ceramic lining and aluminum alloy tube, which is applied in the direction of tubes, rigid tubes, mechanical equipment, etc., can solve the problems of easy melting, low melting point of aluminum alloy, and preparation of ceramic coatings, and achieve weight reduction, simple manufacturing method, and cheap effect

Inactive Publication Date: 2012-12-19
江阴东大新材料研究院
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Problems solved by technology

However, the current preparation technology of ceramic-lined aluminum alloy pipes is not up to standard. Because the melting point of aluminum alloy is relatively low and it is easy to melt at high temperature, it is difficult to directly prepare ceramic coatings on the inner surface of aluminum alloy by self-propagating method, and it is difficult to meet the requirements of light weight composite pipes. Quantitative requirements, so it is difficult to make ceramic-lined aluminum alloy pipes

Method used

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Embodiment Construction

[0011] The preparation method of ceramic lined aluminum alloy pipe of the present invention, described method is as follows:

[0012] Step 1. SHS centrifugation

[0013] Thermite is installed in the steel pipe, and after ignition, a self-propagating reaction occurs according to the following formula:

[0014] Fe 2 o 3 +2Al = 2Fe+Al 2 o 3

[0015] Under the high-temperature exothermic reaction, the reaction products iron and alumina are in a molten state, and the motor drives the steel pipe to rotate at a high speed. Under the action of centrifugal force, among the reaction products in the pipe, the dense iron acts as a transition layer to form a metallurgical bond with the steel pipe, and the low-density alumina is distributed on the inner surface of the steel pipe, and the ceramic-lined steel pipe is obtained after cooling.

[0016] Step two, lathe processing

[0017] The paraffin wax is poured into the ceramic-lined steel pipe, and then fixed on a lathe to turn the ou...

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Abstract

The invention relates to a method for producing an ceramic-lined aluminum alloy pipe, comprising the following steps: producing a ceramic-lined steel pipe by adopting the SHS centrifugal process, casting paraffin inside the ceramic-lined steel pipe, fixing the ceramic-lined steel pipe on a turning lathe, turning the outer surface of the ceramic-lined steel pipe, heating an aluminum alloy pipe to make the aluminum alloy pipe expand, extruding the turned ceramic-lined steel pipe into the aluminum alloy pipe at high temperature, and heating the paraffin wholly to obtain the ceramic-lined aluminum alloy pipe. The SHS centrifugal process, the lathe processing process and the sleeving process are used to indirectly product the ceramic lining inside the aluminum alloy composite pipe. The method is simple and adopts the cheap raw materials. The ceramic-lined aluminum alloy pipe has the abrasion resistance and corrosion resistance of the ceramic-lined pipe, and the weight of the composite pipe is reduced greatly.

Description

technical field [0001] The invention belongs to the technical field of surface coating and provides a method for preparing a ceramic coating on the inner surface of an aluminum alloy tube. Background technique [0002] Contemporary industrial production often uses pipelines to transport corrosive and abrasive media, so the pipelines are required to have excellent wear resistance and corrosion resistance, and in some cases, the pipelines are also required to be light in weight. At present, the preparation methods of black cermet-lined aluminum alloy pipes are relatively mature, mainly including nesting method, centrifugal casting, bimetallic centrifugal casting, composite material welding, SHS centrifugal method and static SHS method. Among them, SHS centrifugation products have good performance and are widely used. However, the current preparation technology of ceramic-lined aluminum alloy pipes is not up to standard. Because the melting point of aluminum alloy is relativel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/14C04B35/653B22D19/16
Inventor 陈威陈大智谭佃龙朱丹高一翔杜保达黄忠斌张保国
Owner 江阴东大新材料研究院
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