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Preparation method for stainless steel and carbon steel composite tube liable to weld and coat edges

A stainless steel, easy-to-weld technology

Inactive Publication Date: 2018-07-31
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is very difficult when welding two pieces of different materials
Moreover, the production efficiency is low and the cost is increased
[0004] The existing composite pipe welding technology uses different welding methods for dissimilar metals to weld the base layer, transition layer, and cladding layer, resulting in increased welding difficulty, low efficiency, and high cost of stainless steel composite pipes

Method used

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  • Preparation method for stainless steel and carbon steel composite tube liable to weld and coat edges
  • Preparation method for stainless steel and carbon steel composite tube liable to weld and coat edges

Examples

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Effect test

Embodiment approach

[0006] The present invention is achieved like this, it is characterized in that implementation method is as follows:

[0007] (1) The stainless steel and carbon steel clad plate manufactured with the application number 201610078667.2 and the title of the invention "A method for manufacturing an easy-to-weld cladding stainless steel clad plate" is used as the blank;

[0008] (2) Mill out the welding groove with an included angle α of 45°-60° around the cladding of the above stainless steel and carbon steel composite plate, and use a grinding wheel to remove impurities such as iron oxide scale to make the surface smooth, such as figure 1 shown;

[0009] (3) Use ultrasonic waves to detect flaws on the above-mentioned stainless steel and carbon steel composite plates, and use the JCO forming method on the bending machine to bend the stainless steel composite plates into an open tubular shape. The mouth opening distance d is 10-15mm, such as figure 2 shown;

[0010] (4) Use wel...

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Abstract

The invention discloses a method for rolling a stainless steel tube and a carbon steel tube into a composite tube, and belongs to the technical field of the metal composite tube manufacturing processes. The method is characterized by comprising the following steps of: (1) using a stainless steel composite plate manufactured in a manufacturing method for a stainless steel composite plate liable toweld and coat edges as blank; (2) milling out welding grooves in peripheral coated edges of the composite blank, and grinding by a grinding wheel to move impurities such as oxidized scale; (3) bendingthe stainless steel composite plate into the shape of an open tube by applying a JCO forming method on a bent tube forming machine; (4) adopting an argon-arc welding method for a stirring and friction-welding method along stainless steel coated edges of the bent stainless steel composite plate; (5) performing inclined-rolling thermal expanding on the welded stainless steel composite tube on an inclined-rolling expanding machine; and (6) performing follow-up thermal treatment and tube surface grinding. The method has the advantages that: the two-layer metal composite tube produced by the method is easily welded, production efficiency is improved, and welding seam bonding strength is improved.

Description

technical field [0001] The invention belongs to the technical field of preparing stainless steel and carbon steel composite pipes, and in particular relates to a method for preparing stainless steel and carbon steel composite pipes that are easy to weld and clad. Background technique [0002] Stainless steel and carbon steel composite pipe is a bimetallic composite pipe with a wide range of uses. While giving full play to the excellent mechanical properties of the carbon steel layer of the base pipe, it retains the characteristics of corrosion resistance, wear resistance and beautiful appearance of the stainless steel layer of the cladding pipe, saving energy. material. It has a wide range of application space in petroleum, petrochemical and marine corrosive environments. [0003] In the actual use of stainless steel and carbon steel composite pipes, the connection of bimetallic pipes has always been a technical problem today. Especially for pipes with a diameter between 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 黄庆学李艳威王效岗李玉贵
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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