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Method for producing semi-metallurgical metal composite tube through electric resistance welding

A metal composite pipe and semi-metallurgical technology, applied in the direction of resistance welding equipment, metal processing, metal processing equipment, etc., can solve the problems of high cost and complicated manufacturing process, and achieve the effect of easy disassembly, low input cost and convenient wiring

Active Publication Date: 2015-11-25
XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many manufacturing processes for metallurgical metal clad pipes, such as metallurgical clad plate coil welding, centrifugal casting, pipe inner surfacing, base lining brazing, etc., but some of the above processes are still in the research stage, and some manufacturing processes are cumbersome and higher cost

Method used

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  • Method for producing semi-metallurgical metal composite tube through electric resistance welding
  • Method for producing semi-metallurgical metal composite tube through electric resistance welding
  • Method for producing semi-metallurgical metal composite tube through electric resistance welding

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as figure 1 A method of producing semi-metallurgical metal clad pipes shown by resistance welding comprises the following steps:

[0041] Step 1, base pipe and liner processing: respectively process the base pipe 1 and the liner 3 of the produced metal composite pipe, the length of the liner 3 is greater than the length of the base pipe 1;

[0042] Step 2: Base pipe and liner assembly and mechanical compounding: the liner 3 described in step 1 is coaxially loaded into the base pipe 1, and both ends of the liner 3 are extended to the outside of the base pipe 1; The bimetallic pipe mechanical composite method combines the base pipe 1 and the liner pipe 3 into one body to form a mechanical metal composite pipe; the segments at both ends of the liner pipe 3 protruding to the outside of the base pipe 1 are all overhanging sections; The microstructure of the substrate-liner contact surface in mechanical metal composite pipes, see image 3 ;

[0043] Step 3. Preparatio...

Embodiment 2

[0077] In this embodiment, the difference from Embodiment 1 is that the finished semi-metallurgical metal composite pipe has a specification of Φ610×(20+2) mm; the material of the base pipe 1 in step 1 is L485 carbon steel, and The outer diameter of the tube 1 is Φ610mm, the length is 3m and its wall thickness is 20mm; the material of the liner 3 is 316L stainless steel and its wall thickness is 2mm, the outer diameter of the liner 3 is Φ560mm and its length is 3.3 m; L=150mm in the second step; the welding current in the fourth step is 8000A and the welding time is 400ms.

[0078] In this embodiment, the remaining method steps and parameters are the same as those in Embodiment 1.

[0079] In this example, the results of the endoscopic inspection, bonding strength inspection, metallographic inspection of the substrate-lining interface, radiographic flaw detection, and hydraulic test of the processed and formed semi-metallurgical metal composite pipe are all qualified, and the ...

Embodiment 3

[0081] In this embodiment, the difference from Embodiment 1 is that the finished semi-metallurgical metal composite pipe has a specification of Φ76×(7+2) mm; the base pipe 1 in step 1 is made of 20G carbon steel, and the base The outer diameter of the tube 1 is Φ76mm, the length is 10m and its wall thickness is 7mm; the material of the liner 3 is 2205 duplex stainless steel and its wall thickness is 2mm, the outer diameter of the liner 3 is Φ60mm and its length It is 10.16m; L=80mm described in the second step; the welding current in the fourth step is 14500A and the welding time is 200ms.

[0082] In this embodiment, the remaining method steps and parameters are the same as those in Embodiment 1.

[0083] In this example, the results of the endoscopic inspection, bonding strength inspection, metallographic inspection of the substrate-lining interface, radiographic flaw detection, and hydraulic test of the processed and formed semi-metallurgical metal composite pipe are all qu...

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Abstract

The invention discloses a method for producing a semi-metallurgical metal composite tube through electric resistance welding. The method includes the steps that firstly, a base tube and a liner tube are machined; secondly, the base tube and the liner tube are assembled and mechanically composited to form a mechanical metal composite tube; thirdly, welding preparation of electric resistance welding is conducted, two electric resistance welding electrodes of an electric resistance welding machine are installed at the two ends of the mechanical metal composite tube respectively, one electric resistance welding electrode is installed on the extending section at one end of the liner tube, and the other electric resistance welding electrode is installed at one end of the base tube; fourthly, electric resistance welding is conducted, the base tube and the liner tube in the mechanical metal composite tube are welded through the electric resistance welding machine; and fifthly, subsequent machining is carried out. The method is simple in step, reasonable in design, convenient to implement, high in welding quality and good in use effect. Bonding strength between the base tube and the liner tube in the machined and formed semi-metallurgical metal composite tube is high. Besides, machining efficiency is high, and machining quality is easy to guarantee.

Description

technical field [0001] The invention belongs to the technical field of composite pipe processing, and in particular relates to a method for producing semi-metallurgical metal composite pipes by resistance welding. Background technique [0002] In recent years, metal composite pipes (also known as bimetallic composite pipes) have been increasingly widely used in oil and gas exploration and transportation, chemical industry, and water supply and drainage industries. Metal composite pipe is a high-tech product that combines two metal pipes of different materials in different forms through composite technology. The metal composite pipe is composed of a base pipe and a liner coaxially installed in the base pipe. The outer base pipe mainly plays the role of pressure bearing and rigid support of the pipe, while the inner liner can effectively undertake the corrosion resistance of the pipe, so as to give full play to the corrosion resistance of the pipe. The excellent characteristi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/00B23K11/34B23P15/00B23K101/06
CPCB23K11/002B23K11/34B23K2101/06B23P15/00
Inventor 史长明郭霖张燕飞王小艳王思恩魏帆
Owner XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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