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Large-diameter double-metal composite pipe manufacturing technology and diameter expanding forming device

A bimetal composite pipe and manufacturing process technology, which is applied in the directions of manufacturing tools, metal processing equipment, feeding devices, etc., can solve the problems of poor reliability of composite quality between layers of composite pipes, and achieve stable pipe quality, resource saving, and service life extension. Effect

Active Publication Date: 2015-05-13
常熟东南高新技术创业服务有限公司
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  • Summary
  • 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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  • Large-diameter double-metal composite pipe manufacturing technology and diameter expanding forming device
  • Large-diameter double-metal composite pipe manufacturing technology and diameter expanding forming device
  • Large-diameter double-metal composite pipe manufacturing technology and diameter expanding forming device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: The product produced is a wear-resistant large-diameter bimetal composite pipe for long-distance coal slurry transportation, with a specification of φ813×23×8000mm (inner layer 10mm) of 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: At the same time, prepare Q235 carbon steel with a specification of φ813×13×8500mm as the outer tube to be compounded; chromium-containing alloy steel pipe with a size of φ767×10.5mm as the to be compounded Inner tube; the inner tube of chromium-containing alloy steel at the end of the double-layer material tube should extend out of the outer tube. The length of the inner tube extension ΔL is calculated according to the formula to be 52mm, multiplied by the adjustment factor of 1.2, and the value is 64mm , So the blanking size of the inner tube is φ767×10.5×8564mm;

[0045] (2) Sleeve: sleeve the inner t...

Embodiment 2

[0050] Example 2: The product produced is anti-H for long-distance transportation of sour oil and gas 2 , CO 2 Corroded large-diameter bimetallic pipe. The specification is a composite pipe of X65 steel pipe with φ914×42.9×8000mm (inner wall thickness 20mm) and high-grade niobium-containing chromium-containing alloy steel pipe. The specific implementation process includes 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 the size of φ846.2×22.5mm containing niobium and chromium alloy steel pipe as the waiting material. Composite inner tube material; in the double-layer material tube, the inner tube of niobium-chromium alloy steel should protrude from the end of the outer tube. The length of the protruding part ΔL is calculated according to the formula 118mm, multiplied by the adjustment factor of 1.2, and take the value 142mm, the blanking size of t...

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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 invention relates to the technical field of advanced manufacturing of new materials, in particular to a large-diameter bimetal composite pipe manufacturing process that can be used in various fields such as special oil and gas transportation, chemical reactant transportation, single-phase or multi-phase material transportation under complex service conditions, and Diameter expansion forming device used in this process. Background technique [0002] With the increasing complexity and harshness of the service environment of various pipe components, higher and higher standards have been proposed for the performance, variety, quality stability, green manufacturing and life extension of the various pipes and pipe components in service. Requirements, the use of relatively expensive high-grade and high-alloy steel pipes and pipe components is increasing, especially for special oil and gas transportation including moisture transportation, high temperature and h...

Claims

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Application Information

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Patent Type & Authority Applications(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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