Production method of large-coil-weight white copper alloy coil pipe

A production method and alloy disc technology are applied in the production field of large-scale heavy cupronickel alloy coil tubes, which can solve the problems of low quality of cast slabs, coarse grains, insufficient yield, etc., and achieve excellent mechanical properties, uniform cast slab structure, The effect of uniform and stable composition

Inactive Publication Date: 2013-05-01
GOLDEN DRAGON PRECISE COPPER TUBE GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the main production method of white copper alloy discs at home and abroad is the traditional process of "semi-continuous casting-extrusion-cold rolling-drawing", which has the disadvantages of long process flow, low yield, and high energy consumption. The characteristics of the process are limited, the finished product rate is less than 50%, and it is impossible to provide qualified extruded white copper tube blanks with a single weight of more than 300kg, and it is also impossible to produce heavy and super long white copper alloy coils
[0003] The existing method of "horizontal continuous casting + planetary rolling" to produce white coppe

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Production method of Φ9.52×0.7 white copper coil:

[0038] (1) In the melting furnace, according to the mass percentage, the alloy with nickel 9wt%, iron 1.13wt%, manganese 1.07wt%, impurity content ≤ 0.7%, and copper balance is melted, and the melting temperature is 1280°C. The alloy composition of the solution is tested by the spectrometer and then transferred to the holding furnace. The temperature of the holding furnace is 1250°C. Electromagnetic stirring is applied during the horizontal continuous casting process to produce white copper alloy billets with specifications of Φ90×23×15000mm;

[0039] (2) The cast slab is milled to remove surface scale, and then sent to a three-roller planetary rolling mill for rolling. The size of the rolled tube is Φ45~48×1.9~2.0mm, and the rolled tube is double-drawn Φ38×1.6mm, Φ30×1.4 mm, using H 2 3% H by volume 2 -N 2 Mixed reducing atmosphere protection, 2-pass drawing, the specification of the combined drawing tube is Φ30×1...

Embodiment 2

[0046] ? Production method of 15.88×0.89 cupronickel coil

[0047] (1) In the melting furnace, according to the mass percentage, the alloy with nickel 11wt%, iron 1.0wt%, manganese 1.5wt%, impurity content ≤ 0.7%, and copper balance is melted, and the melting temperature is 1280°C. The alloy composition of the solution is tested by the spectrometer and then transferred to the holding furnace. The temperature of the holding furnace is 1250°C. Electromagnetic stirring is applied during the horizontal continuous casting process to produce white copper alloy billets with specifications of Φ90×23×15000mm;

[0048] (2) The cast slab is milled to remove surface scale, and then sent to a three-roller planetary rolling mill for rolling. The size of the rolled tube is Φ45~48×1.9~2.0mm, and the rolled tube is double-drawn Φ38×1.6mm, Φ30×1.4 mm, using H 2 3% H by volume 2 -N 2 Mixed reducing atmosphere protection, 2-pass drawing, the specification of the combined drawing tube is Φ30×1...

Embodiment 3

[0055] ? Production method of 25.40×1.00 cupronickel coil

[0056] (1) In the melting furnace, according to the mass percentage, the alloy with nickel 9.95wt%, iron 1.8wt%, manganese 0.5wt%, impurity content ≤ 0.7%, and copper balance is melted, and the melting temperature is 1280°C. The alloy composition of the solution is tested by the spectrometer and then transferred to the holding furnace. The temperature of the holding furnace is 1250°C. Electromagnetic stirring is applied during the horizontal continuous casting process to produce white copper alloy billets with a specification of Φ120×30×15000mm;

[0057] (2) The cast slab is milled to remove surface scale, and then sent to a three-roll planetary rolling mill for rolling. The size of the rolled tube is Φ56~60×2.1~2.4mm, and the rolled tube is double-drawn Φ48×1.9mm, Φ38×1.65 mm, using H 2 5% H by volume 2 -N 2 Mixed reducing atmosphere protection, 4-pass drawing, the specification of the combined drawing tube is Φ3...

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Abstract

The invention provides a production method capable of producing a large-coil-weight white copper alloy coil pipe with the weight being more than 300kg and high rate of finished products, and the method comprises the following steps of (1) smelting a white copper alloy material, and adopting a horizontal continuous casting technology of a composite electromagnetic stirring technology to produce a white copper alloy hollow casting blank; (2) rolling the white copper alloy hollow casting blank which is face milled, and utilizing a duplex pulling device to stretch a rolled pipe; (3) washing the inner wall and the outer wall of the white copper duplex stretched coil pipe, and adopting a passing-type sensing annealing device to continuously anneal the white copper duplex stretched coil pipe; (4) stretching the annealed duplex stretched coil pipe; (5) conducting eddy current test on the white copper stretched coil pipe, and simultaneously horizontally winding the copper pipe to form the large-coil-weight white copper alloy coil pipe; and (6) annealing the large-coil-weight white copper alloy coil pipe needing to be annealed. Due to the adoption of the production method of the large-coil-weight white copper alloy coil pipe, the large-coil-weight white copper alloy coil pipe with single coil weight being more than 300kg can be produced.

Description

technical field [0001] The invention relates to a production method of a coiled tube, in particular to a production method of a large heavy white copper alloy coiled tube. Background technique [0002] At present, the main production method of white copper alloy discs at home and abroad is the traditional process of "semi-continuous casting-extrusion-cold rolling-drawing", which has the disadvantages of long process flow, low yield, and high energy consumption. The characteristics of the process are limited, the finished product rate is less than 50%, and it is impossible to provide qualified extruded white copper tube blanks with a single weight of more than 300kg, and it is also impossible to produce heavy and super long white copper alloy coils. [0003] The existing method of "horizontal continuous casting + planetary rolling" to produce white copper tubes has the following disadvantages: first, the quality of the slab is not high, the grains are coarse, the structure is...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB21C37/06B22D11/045B21C23/085B21C23/002B22D11/006C22F1/08
Inventor 张习刚陈明玉王振明范震雷宇陈会国程大勇
Owner GOLDEN DRAGON PRECISE COPPER TUBE GROUP
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