Manufacturing process of large-diameter bimetallic composite pipe and diameter-expanding forming device

A bimetallic composite pipe and manufacturing process technology, which is applied in the direction of manufacturing tools, metal processing equipment, feeding devices, etc., can solve the problems of poor reliability of the interlayer composite quality of composite pipes, and achieve stable pipe quality, resource saving, and easy handling heart effect

Active Publication Date: 2016-11-09
常熟东南高新技术创业服务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the mechanical composite technology has the advantages of simple process, low production cost, and limited one-time investment, the composite pipe produced is often poor in quality and reliability due to interlayer composite, which is the so-called "two-layer skin" Difficult to enter the high-end manufacturing field

Method used

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  • Manufacturing process of large-diameter bimetallic composite pipe and diameter-expanding forming device
  • Manufacturing process of large-diameter bimetallic composite pipe and diameter-expanding forming device
  • Manufacturing process of large-diameter bimetallic composite pipe and diameter-expanding forming device

Examples

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Effect test

Embodiment 1

[0043] Embodiment 1: The production product is an anti-corrosion large-diameter bimetal composite pipe for long-distance coal slurry transportation, and the specification is φ813 × 23 × 8000mm (inner layer 10mm) No. 20 high-quality carbon steel and chromium-containing alloy steel Composite pipe. The specific process includes the following process steps:

[0044] (1) Material preparation: Q235 carbon steel with a specification of φ813×13×8500mm is prepared at the same time as the outer tube to be compounded; the chromium-containing alloy steel pipe material with a size of φ767×10.5mm is used as the material to be compounded Inner tube: the chromium-containing alloy steel inner tube at the end of the double-layer material tube should protrude from the outer tube, and the length ΔL of the protruding part of the inner tube is calculated according to the formula. The result is 52mm, multiplied by the adjustment factor of 1.2, and the value is 64mm , so the blanking size of the inn...

Embodiment 2

[0050] Embodiment 2: The produced product is anti-H for long-distance transportation of sour oil and gas 2 , CO 2 Corroded large diameter bimetallic tubing. Composite pipes of X65 steel pipes with specifications of φ914×42.9×8000mm (inner wall thickness 20mm) and high-grade niobium-containing chromium alloy steel pipes in the inner layer. Concrete implementation process comprises the following process steps:

[0051] (1) Material preparation: At the same time, prepare X65 steel with a specification of φ914×22.9×8500mm as the outer tube to be compounded, and a niobium-containing and chromium alloy steel tube with a size of φ846.2×22.5mm as the material to be combined. Composite inner pipe material; in the double-layer material pipe, the inner pipe of niobium-chromium alloy steel should protrude from the end of the outer pipe. The length ΔL of the protruding part is calculated according to the formula 118mm, multiplied by the adjustment factor of 1.2, and the value is 142mm, ...

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Abstract

The invention discloses a large-diameter double-metal composite pipe manufacturing technology and a diameter expanding forming device. The method comprises the steps that two kinds of metal pipe materials which meet requirements are combined in a sleeved mode according to needs, then outer layer metal pipe materials are subjected to on-line quick preheating processing, inner diameter expanding composite forming is carried out on the specific diameter expanding forming device in a synchronization mode, then quick and even cooling is carried out through a cooler at a certain distance at the outer end of a deforming zone outlet, and finally composite pipe materials with a high-quality composite interface are obtained. A pushing type diameter expanding forming technology and a hollow spherical diameter expanding core die easy to center and long in service life are used, diameter forming composite and physical shrinking composite double composite mechanisms are carried out on line, so that a high-quality composite interface is obtained, an inner layer pipe and an outer layer pipe are integrally fastened through a special forming mechanism, new performance advantages and cost performance advantages are achieved, and the purposes that pipe quality is stable, service life is prolonged, and resources are saved are achieved.

Description

technical field [0001] The present invention relates to the technical field of advanced manufacturing of new materials, in particular to a large-diameter bimetallic composite pipe manufacturing process and the Expanding forming unit for this process. Background technique [0002] As the service environment of various pipe parts becomes more and more complex and harsh, higher and higher requirements are put forward for the performance, variety, quality stability, green manufacturing and life extension of various pipes and pipe parts in service. There are more and more occasions requiring the use of relatively expensive high-grade steel and high-alloy steel pipes and pipe components, especially for special oil and gas transportation including wet gas transportation, high temperature and high pressure or ultra-low temperature reactant transportation and complex service The research and development and production of large-diameter high-grade steel grade and high-alloy steel pip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D39/20B21D43/08
CPCB21C37/154B21D39/20B21D43/08
Inventor 付贵山许春晖王跃杰
Owner 常熟东南高新技术创业服务有限公司
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