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Electroplastic rolling method and apparatus for deformable magnesium alloy sheet, band and wire rod

A deformed magnesium alloy, electroplasticity technology, applied in metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of poor quality of hot-rolled products, high cost of cold-rolled processing, and low performance

Active Publication Date: 2009-11-04
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problems existing in the prior art, especially to overcome the high cost of cold rolling processing (increased annealing times) and poor quality of hot-rolled products (surface oxidation, difficult size control, lower performance and possible poor consistency) and other defects, the present invention provides a method and device for electroplastic rolling of deformed magnesium alloy sheets, strips, and wires. At this time, the rolling deformability (plasticity) of magnesium materials is greatly improved, and the deformation resistance is reduced. Avoid high temperature oxidation and poor dimensional accuracy, the final product has higher strength, better toughness and more uniform product performance than conventional rolling

Method used

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  • Electroplastic rolling method and apparatus for deformable magnesium alloy sheet, band and wire rod
  • Electroplastic rolling method and apparatus for deformable magnesium alloy sheet, band and wire rod

Examples

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Embodiment 1

[0023] Example 1: The incoming material is a fully annealed AZ31 magnesium wire with a diameter of 1.7 mm, which is compared with cold rolling and electroplastic rolling.

[0024] Refer to electroplastic rolling figure 1 , the tension of the continuous magnesium material 2 is controlled by the unwinding and rewinding device, and the two-roll rolling mill with a work roll diameter of 100 mm is driven to roll at the entrance speed of 3 mpm in the direction of the arrow. The imported magnesium material is introduced into high-energy continuous electric pulses, and the positive and negative poles are respectively conductive wheels 3 (60mm in diameter) and rolls 7 (the distance between the positive and negative poles being 150mm) made of copper-graphite are connected to the electric pulse power supply 1. The electrical section 2' is subjected to forced cooling by cooling device 4, the circulating cooling medium is quenching oil, the cooled oil is pumped through the inlet 42, and th...

Embodiment 2

[0026] Example 2: The incoming material is a fully annealed AZ31 magnesium strip with a thickness of 0.8 mm and a width of 2. mm, compared between electroplastic rolling and cold rolling to a thickness of 0.7 mm.

[0027] The device configuration of the electroplastic rolling process is exactly the same as that of the specific embodiment 1 except that the center distance between the positive and negative electrodes is adjusted to 200 mm. At the same time, the high-energy continuous pulse electrical parameters input at this time are changed to: pulse width 60μs, frequency 400Hz, current density 1500A / mm 2 .

[0028] During the rolling process, the deformation resistance of electroplastic rolling is 17% lower than that of cold rolling (on-line test with a 5-ton pressure sensor), and the comparison of material properties after rolling: the tensile strength of electroplastic rolling samples is 295Mpa, and the elongation is 6.5 %; while the tensile strength of the cold-rolled samp...

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Abstract

This invention relates to an electro-plastic rolling method and a device for deformed Mg alloy thin plates, strips and wires including: inducing the deformed Mg alloy plates, strips and wires in single-way instant high energy continuous pulse current directly in the process of rolling, the current passes through a pair of electric contact devices with their distance adjustable to apply on the moving Mg materials, and the roller is the negative in it, necessary cooling and lubrication measures should be taken when rolling, this time, the rolling deformation ability of the Mg material is increased greatly and the resistance is reduced to avoid high temperature oxidation and poor accuracy in size.

Description

technical field [0001] The invention relates to the rolling technology of thin plates, strips and wires (thickness less than 2 mm or diameter less than 3 mm), especially the electroplastic rolling method and device of deformed magnesium alloy thin plates, bands and wires. Background technique [0002] Metal magnesium is known as "the most promising green engineering material in the 21st century". Since the 1990s, Japan, the United States, Germany, Australia and other countries have successively issued their own magnesium research programs. The analysis of the development trend of major metal materials in the world in recent years shows that the application of steel, copper, lead, zinc, aluminum and other materials has shown a downward or slow growth trend, while magnesium has maintained a rapid growth rate of more than 20% per year. The reason is that magnesium alloy, as the lightest engineering metal material, has amazing reserves (the content of magnesium in seawater rank...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/40B21B3/00B21B9/00B21B15/00
Inventor 唐国翌徐卓辉田绍权肖昌鹏
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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