Method for producing metal laminated composite tube

A composite pipe and metal layer technology, applied in the direction of pipes, rigid pipes, mechanical equipment, etc., to achieve the effects of low production cost, high mold life, simple production process and equipment

Inactive Publication Date: 2015-04-22
CHANGSHU DONGTAO METAL COMPOSITE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention is to provide a method for preparing a metal laminated composite pipe, which can solve the above-mentioned inadequacies existing in the existing composite pipe preparation technology

Method used

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  • Method for producing metal laminated composite tube

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Effect test

preparation example Construction

[0023] The invention discloses a method for preparing a metal laminated composite pipe, the specific steps are as follows:

[0024] (1) Select the metal tube: The laminated composite tube is prepared by combining two kinds of metal tubes, the inner and outer metal tubes have a wall thickness of 10-30mm, and The outer diameter of the outer metal tube is 100-300mm. After the package, the gap between the inner diameter of the outer metal tube and the outer diameter of the inner metal tube is 0.2-0.3mm; wherein, the inner metal tube is a stainless steel tube, a hot-dip galvanized steel tube or Aluminum tube; the outer tube is copper tube, titanium tube or aluminum alloy tube;

[0025] (2) Metal tube pretreatment: degreasing, derusting, grinding and drying the inner surface of the outer metal tube selected in step (1) and the inner and outer surfaces of the inner metal tube respectively; wherein, the degreasing method is Wash with an inorganic strong alkaline solution with a mass ...

Embodiment 1

[0031] (1) Select the metal tube: The laminated composite tube is prepared by combining the inner and outer metal tubes. The inner metal tube is a stainless steel tube. Copper pipe, its specification is that the wall thickness of the pipe is 30mm, and the outer diameter is 131mm;

[0032] (2) Metal tube pretreatment: the inner surface of the outer metal tube of the copper tube and the inner and outer surfaces of the stainless steel tube are washed and degreased with a sodium hydroxide solution with a mass concentration of 8%, and then hydrochloric acid with a mass concentration of 8% Wash and remove rust with the solution, then use a wire brush to polish the treated surface to a fresh metal surface, and finally dry the treated surface with hot air;

[0033] (3) Pipe fitting assembly: Set the treated stainless steel pipe in the copper pipe, and insert a mandrel coated with lubricating oil in the stainless steel pipe;

[0034] (4) Compression compounding: Put the pipe fittings ...

Embodiment 2

[0038] (1) Select the metal pipe: The laminated composite pipe is prepared by combining the inner and outer metal pipes. The inner metal pipe is a hot-dip galvanized steel pipe. The tube is an aluminum alloy tube with a wall thickness of 30mm and an outer diameter of 180.5mm;

[0039] (2) Metal pipe pretreatment: Wash and degrease the inner surface of the outer metal pipe of the aluminum alloy pipe and the inner and outer surfaces of the hot-dip galvanized steel pipe with a potassium hydroxide solution with a mass concentration of 8%, and then use a mass concentration of 8 % nitric acid solution to wash and remove rust, then use a wire brush to polish the treated surface to a fresh metal surface, and finally dry the treated surface with hot air;

[0040] (3) Pipe fitting combination: Set the treated hot-dip galvanized steel pipe in the aluminum alloy pipe, and insert a mandrel coated with lubricating oil in the hot-dip galvanized steel pipe;

[0041] (4) Compression compoundi...

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Abstract

The invention discloses a method for producing a metal laminated composite tube, which comprises the following steps: 1)selecting a metal tube; 2)pretreating the metal tube; 3)combining a pipe fitting; 4)compacting and compositing; 5)performing plastic processing; and 6)performing post-treatment. The method has the advantages of simple production technology and equipment, high die life and low production cost, core rod size and plastic processing condition can be changed according to the practical requirement, so that the bimetallic laminated composite tube with different specification can be produced; the prepared bimetallic laminated composite tube contains a metal transition layer, metallurgy combination of bimetallic tubes can be realized, no brittle intermetallic compounds can be generated on an interface, interface combination strength and subsequent processing performance of the laminated composite tube can be increased, and the application prospect is wide.

Description

technical field [0001] The invention relates to the field of metal composite materials, in particular to a method for preparing a metal laminated composite pipe. Background technique [0002] With the continuous development of aerospace, marine engineering, energy and power, petrochemical and other industries, it is increasingly difficult for a single material to meet the actual use requirements in terms of performance. Combining two or more materials with different properties will significantly improve the comprehensive performance. The performance of composite materials has been paid more and more attention. Therefore, a layered composite pipe with the advantages of two or more metals produced by metal composite technology came into being. At present, the preparation methods of bimetallic composite pipe mainly include: drawing composite, hydraulic bulging composite, rolling composite and thermal diffusion welding and other methods. These composite methods all have the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06F16L9/02
CPCB21C37/06F16L9/02
Inventor 施建东
Owner CHANGSHU DONGTAO METAL COMPOSITE MATERIAL
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