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Machining method for seamless copper pipe

A processing method and technology for copper pipes, applied in the field of metal pipe fittings processing, to achieve the effects of short process flow, pipe wall thickness and excellent electrical conductivity

Active Publication Date: 2013-06-26
常熟中佳新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the limitation of the production process, the electrical conductivity of the copper material of the seamless copper pipe in the prior art still needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] A processing method of a seamless copper tube, comprising the following steps:

[0023] a. Casting:

[0024] First wash the furnace twice, and then carry out semi-continuous casting; the raw material is high-purity cathode copper plate with a content of more than 99.97%, and no other waste is added; during the casting process, keep the charcoal covered, so that the iron does not contact the copper liquid, add 0.3 Kg phosphorous copper; copper ingots of Φ160mm×520mm specification are prepared in this step; the conductivity of the copper ingots prepared in this step is greater than 95% IACS, and the chemical composition inspection of the copper ingots conforms to: copper content ≥ 99.97%, iron content ≤ 50ppm ;

[0025] b. Extrusion:

[0026] The Φ160mm×520mm copper ingot prepared in step a is heated to 850°C, and the tube blank of Φ65mm×10.5mm is obtained by extrusion. In this process, the extruded ceramic die is Φ65mm, the perforation needle is Φ44mm, and the tube bla...

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PUM

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Abstract

The invention discloses a machining method for a seamless copper pipe. The method disclosed by the invention comprises the following steps: fusion casting, extruding, head soldering, drawing, head sawing, rolling, saw cutting and packaging. The method disclosed by the invention has the advantages of short technological process and high automaticity; the seamless copper pipe produced by the methodhas the advantages of small impurity content, low oxygen content, higher copper purity, thicker pipe wall and more excellent electrical conductivity and meets the technical requirements of an electric power system for the seamless copper pipe. By detecting the finished product of the seamless copper pipe produced by the method disclosed by the invention, the content of copper is more than or equal to 99.97%; the content of phosphorus is less than or equal to 20ppm; the content of stibium is less than or equal to 20ppm; the content of ferric is less than or equal to 40ppm; the content of oxygen is less than or equal to 20ppm; the specific conductance reaches 59.16MS / m; the electric conductivity reaches 102.0%IACS (International Annealed Copper Standard); and the resistivity reaches 0.016903ohm mm<2> / m.

Description

technical field [0001] The invention belongs to the field of metal pipe fittings processing, and particularly relates to a processing method of a seamless copper pipe. Background technique [0002] With the progress of society and economy, the demand for non-ferrous metals - copper in the international market is increasing. Among them, China is a big country in terms of copper demand in the world. However, in the face of limited copper resources, conductive copper rods were used in power systems in the past. During the production process of conductive copper rods, there was a large waste of copper materials, the purity of copper materials was low, and the electrical conductivity was poor. In order to make rational use of limited copper resources, seamless copper tubes appear in the prior art, and the production of seamless copper tubes saves more copper. [0003] However, due to the limitation of the production process, the electrical conductivity of the copper material of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
Inventor 赵钦海彭永聪
Owner 常熟中佳新材料有限公司
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