Severe plastic deformation technology of magnesium alloy board

A large plastic deformation, magnesium alloy technology, applied in the direction of metal rolling, can solve the problems of many processes, low efficiency, high cost, etc., and achieve the effect of simple process, high strength and high production efficiency

Active Publication Date: 2013-09-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the prior art, in the rolling process of magnesium alloy sheet, multi-pass rolling is req

Method used

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  • Severe plastic deformation technology of magnesium alloy board
  • Severe plastic deformation technology of magnesium alloy board
  • Severe plastic deformation technology of magnesium alloy board

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example one:

[0020] 1) Magnesium alloy sheet preparation: First, prepare the sheet for electro-induced asynchronous stack rolling, and prepare it for use after pre-cutting.

[0021] 2) Homogenizing the plate, heating speed 5℃ / min, heating temperature 400℃, holding time 40min, cooling with furnace.

[0022] 3) The homogenized magnesium alloy sheet surface is milled. The milling process requires high-speed milling, the milling cutter speed is greater than 2800r / min, and the surface roughness is less than Ra6.3μm.

[0023] 4) Carry out ultrasonic cleaning on the board processed in step 3). Acetone is used as cleaning fluid to remove impurities and oil stains.

[0024] 5) Wrap the two magnesium alloy plates after the above operation with pure aluminum foil, and age at room temperature.

[0025] 6) The voltage applied on both sides of the plate is 110V, the pulse width of the high-energy electric pulse is 60μs, and the length of the electrified treatment area is about 300mm. Start ...

Example Embodiment

[0028] Embodiment two:

[0029] It is basically the same as the first embodiment, and the difference lies in:

[0030] Step 2) The process parameters of the homogenization treatment are the heating rate of 8°C / min, the heating temperature of 420°C, the holding time of 50min, and the furnace cooling.

[0031] Step 3) The speed of the high-speed milling is 2900r / min, and the surface roughness is Ra3.2μm.

[0032] Step 5) Wrap the three magnesium alloy plates after the above operations with pure aluminum foil, and preheat them in a resistance furnace at a heating temperature of 200°C and a holding time of 3-8 minutes.

[0033] Step 6) Take out the plate in step 5). The applied voltage on both sides is 115V, the pulse width of the high-energy electric pulse is 70μs, the length of the electrified treatment area is about 250mm, the upper and middle roll speed is 1.5m / min, and the lower roll speed is 0.8m. / min. The rolling process is completed at 200°C and within one pass, with a 45% reduct...

Example Embodiment

[0036] Embodiment three:

[0037] It is basically the same as the first embodiment, and the difference lies in:

[0038] Step 2) The process parameters of the homogenization treatment are heating rate 10℃ / min, heating temperature 440℃, holding time 60min, and cooling with furnace.

[0039] Step 3) The rotational speed of medium and high-speed milling is 3000r / min, and the surface roughness is Ra3.2μm.

[0040] Step 5) Wrap the four magnesium alloy plates after the above operations with pure aluminum foil, and preheat them in a resistance furnace at a heating temperature of 300°C and a holding time of 3-8 minutes.

[0041] Step 6) Take out the plate in step 5). The applied voltage on both sides is 115V, the pulse width of the high-energy electric pulse is 80μs, the length of the electrified treatment area is about 250mm, the middle and upper roll speed is 2m / min, and the lower roll speed is 1.2m / min. The rolling process is completed at 300°C and within one pass, using a 40% reduction,...

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Abstract

The invention relates to a severe plastic deformation technology of a magnesium alloy board. The technology comprises the following steps of: pretreating the magnesium alloy board; carrying out homogenization treatment on the magnesium alloy board; carrying out surface finishing on the magnesium alloy board; cleaning the magnesium alloy board; preheating the magnesium alloy board; carrying out pack rolling deformation on the magnesium alloy board; putting the magnesium alloy board into a rolling mill, and carrying out asynchronous pack rolling deformation on the magnesium alloy board; and carrying out annealing treatment on the magnesium alloy board. The magnesium alloy board processed by the technology has the advantages of being simple in technology, high in production efficiency, good in mechanical property and good in product quality.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a process for large plastic deformation of magnesium alloy plates. Background technique [0002] Magnesium alloy is light in weight (ρ=1.74×103kg / m3, only 2 / 3 of aluminum), high specific strength (σ / ρ=120, 3-4 times that of iron), and is widely used in aerospace, machinery, electronics, automobiles, etc. It has been widely used in the industrial field. However, cast magnesium alloy has low strength at room temperature and low temperature, poor plastic deformation ability, and unsatisfactory corrosion resistance, which limits its wide application. Compared with cast magnesium alloys, wrought magnesium alloys have higher strength, better ductility, and more diverse mechanical properties, as shown in Supplementary Table 1. [0003] However, since magnesium belongs to the close-packed hexagonal structure, only The basal surface slips and the mechanical twin starts, and th...

Claims

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Application Information

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IPC IPC(8): C22F1/06C22F3/00B21B3/00
Inventor 王守仁薛广记宋令慧韩莹
Owner UNIV OF JINAN
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