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A kind of production method of large-diameter white copper tube

A production method and large-diameter technology, applied in the field of large-diameter cupronickel pipe production, can solve the problems of low uniformity of wall thickness of horizontal continuous casting pipe billet, long production process and low yield, and achieve uniform solidification structure and cooling strength. The same effect with high yield

Active Publication Date: 2021-06-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to solve the problems of long traditional production process, low yield and high cost of large-diameter white copper pipes, as well as the problems of low wall thickness uniformity and small diameter of horizontal continuous casting tube blanks, and to provide a high yield. A short-process production method for large-diameter white copper pipes with the characteristics of low cost and low cost

Method used

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  • A kind of production method of large-diameter white copper tube
  • A kind of production method of large-diameter white copper tube
  • A kind of production method of large-diameter white copper tube

Examples

Experimental program
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Effect test

Embodiment 1

[0092] The production method of BFe10-1.4-1 white copper (soft) straight tube with a size of φ419×6mm

[0093] Vertical continuous casting of white copper tube billet: BFe10-1.4-1 white copper tube billet of φ360×15mm is prepared by vertical continuous casting process of hot and cold combined casting mold. 1200℃, primary cooling water flow rate is 600L / min, secondary cooling water flow rate is 600L / min, traction speed is 50mm / min;

[0094] Thermal expansion of cupronickel tube billet: The continuous casting tube blank is expanded to φ480×11mm by thermal expansion process, the heating temperature of the tube blank is 550°C, the angle of the expansion section is 10°, and the diameter expansion speed is 200mm / min;

[0095] Periodic cold rolling: use three-roller periodical cold rolling to expand the pipe billet for rolling, and roll to the specification of φ419×6mm in a single pass;

[0096]The tube blank after periodic cold rolling is subjected to finished bright annealing, the...

Embodiment 2

[0098] The production method of BFe10-1.4-1 cupronickel (soft) straight tube with a size of φ325×4mm

[0099] Vertical continuous casting of white copper tube billet: BFe10-1.4-1 white copper tube billet of φ280×12mm is prepared by vertical continuous casting process of hot and cold combined casting mold. 1200℃, primary cooling water flow rate is 400L / min, secondary cooling water flow rate is 600L / min, traction speed is 60mm / min;

[0100] Thermal expansion of cupronickel tube billet: The continuous casting tube blank is expanded to φ370×9mm by thermal expansion process, the heating temperature of the tube blank is 550°C, the angle of the expansion section is 10°, and the diameter expansion speed is 240mm / min;

[0101] Periodic cold rolling: Three-roller periodical cold rolling is used to roll the expanded tube billet to the specification of φ325×4mm in a single pass;

[0102] The tube blank after periodic cold rolling is subjected to finished bright annealing, the annealing t...

Embodiment 3

[0104] The production method of BFe30-1-1 white copper (soft) straight tube with a size of φ273×3mm

[0105] Vertical continuous casting of white copper tube billet: BFe10-1.4-1 white copper tube billet of φ240×12mm is prepared by vertical continuous casting process of hot and cold combined casting mold. 1250°C, primary cooling water flow rate is 600L / min, secondary cooling water flow rate is 600L / min, traction speed is 30mm / min;

[0106] Thermal expansion of cupronickel tube billet: The continuous casting tube blank is expanded to φ320×9mm by thermal expansion process, the heating temperature of the tube blank is 650°C, the angle of the expansion section is 6°, and the diameter expansion speed is 180mm / min;

[0107] Periodic cold rolling: Three-roller periodical cold rolling is used to roll the expanded tube billet to the specification of φ273×3mm in a single pass;

[0108] The tube blank after periodic cold rolling is subjected to finished bright annealing, the annealing te...

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Abstract

The invention belongs to the technical field of technical preparation and processing of metal materials, and in particular relates to a production method of a large-diameter white copper pipe. At present, the production method of a large-diameter white copper pipe mainly adopts "semi-continuous casting solid ingot-piercing extrusion-multi-pass diameter expansion" The process of drawing-multi-pass shrinking drawing-annealing has problems such as low yield, high cost, long process flow, and large investment in large-scale extrusion equipment. The method of thermal expansion-reduction rolling-annealing produces large-diameter white copper pipes, which have the advantages of high production efficiency, short process flow, high yield, and low cost. The pipes have uniform wall thickness and large length per piece. Long and other advantages, suitable for industrial production of large-diameter white copper tubes.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation and processing, and relates to a production method of a large-diameter white copper pipe. Background technique [0002] Cupronickel has excellent mechanical properties, good thermal conductivity, corrosion resistance and anti-biological adhesion properties, and is widely used in thermal power generation, ships, seawater desalination and other fields. At present, the size range of pipes (including pipes, flanges, valves, and bellows) used in seawater pipelines is generally 50-310mm in outer diameter and 3-10mm in wall thickness. They are important structural components in the fields of seawater desalination and ships [Zhang Wenyu, Current status and trends of ship piping materials, New Material Industry, 2011, No.2, p.62~65]. With the rapid development of my country's seawater desalination, ships and other marine industries, especially in recent years, my country's large ships a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/06
Inventor 刘新华雷宇谢建新姜雁斌
Owner UNIV OF SCI & TECH BEIJING