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Method for preparing 300MPa grade and isotropous AZ31 magnesium alloy sheet

An isotropic, magnesium alloy technology, applied in the direction of sheet/plate, temperature control, building components, etc., can solve problems such as difficult to meet performance requirements, uneconomical, etc., achieve low production cost, less one-time investment, and easy control Effect

Inactive Publication Date: 2006-12-27
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is uneconomical to use hot rolling and cast rolling methods, and it is difficult to meet performance requirements

Method used

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  • Method for preparing 300MPa grade and isotropous AZ31 magnesium alloy sheet
  • Method for preparing 300MPa grade and isotropous AZ31 magnesium alloy sheet
  • Method for preparing 300MPa grade and isotropous AZ31 magnesium alloy sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] AZ31 magnesium alloy was smelted, purified and electromagnetically continuously cast into an ingot of 165mm. The alloy composition is shown in Table 1. After the ingot is homogenized and annealed at 400℃×18 hours, the surface is milled and extruded into strips at 300℃. The extrusion ratio is 15, the extrusion (exit) speed is 20m / min, and the thickness of the extruded sheet is 7mm. . Then cut the extruded sheet into sheets with a width of 330mm along the extrusion direction, heat the sheet to 300°C, preheat the rolls of the rolling mill to 150°C, and start rolling, the slab is rolled perpendicular to the original extrusion direction, rolling The speed is 12 m / min; the first pass can reach 40%, the second pass can reach 25%, and the third pass can reach 12%, in order to ensure the flatness of the plate and the dimensional accuracy, close to the product size In the last 1 to 3 passes, the pass reduction should be 4%. After 3 passes of rolling, return to the furnace for ...

Embodiment 2

[0023] AZ31 magnesium alloy was smelted, purified and electromagnetically continuously cast into an ingot of 165mm. The alloy composition is shown in Table 1. After the ingot is homogenized and annealed at 350℃×20 hours, the surface is milled and extruded into strip at 300℃. The extrusion ratio is 8, the extrusion (exit) speed is 30m / min, and the width of the strip after extrusion The thickness is 20mm. Then cut the extruded sheet into a sheet 10mm wider than the finished sheet width along the extrusion direction, heat the sheet to 400°C, preheat the rolls of the rolling mill to 100°C, and start rolling, the slab is rolled perpendicular to the original extrusion direction The rolling speed is 15 m / min; the first pass can reach 50%, the second pass can reach 30%, and the third pass can reach 15%, in order to ensure the flatness and dimensional accuracy of the plate , When approaching the last 1 to 3 passes of the product size, the pass reduction should be about 5%. After 3 p...

Embodiment 3

[0025] AZ31 magnesium alloy was smelted, purified and electromagnetically continuously cast into an ingot of 165mm. The alloy composition is shown in Table 1. After the ingot is homogenized and annealed at 380℃×15 hours, the surface is milled and extruded into strip at 400℃. The extrusion ratio is 8, the extrusion (exit) speed is 10m / min, and the thickness of the strip after extrusion is 15mm. Then cut the extruded sheet into a sheet 20mm wider than the finished sheet width along the extrusion direction, heat the sheet to 300°C, preheat the rolls of the rolling mill to 120°C, and start rolling, the slab is rolled perpendicular to the original extrusion direction The rolling speed is 10 m / min; the first pass can reach 30%, the second pass can reach 20%, and the third pass can reach 10%. In order to ensure the flatness of the plate and the dimensional accuracy , When approaching the last 1 to 3 passes of the product size, the pass reduction should be 3%. After 3 passes of rol...

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Abstract

The invention relates to a method for producing AZ31 magnesium alloy sheet, at 300MPa level and isotropic property, wherein the invention uses magnesium alloy electromagnetic low-temperature semi-casting method to produce blank to be uniformly annealed, milled and compressed at 200-400Deg. C into sheet band, while the compress ratio is 8-15 and the thickness of compressed sheet is 5-20mm; then cutting the compressed sheet into the sheets whose width is 10-30mm, to be heated to 300-400Deg. C; then preheating the roller of rolling machine, vertically to the former extrusion direction, to obtain the sheet whose width is not higher than 500mm and thickness is 0.3-1.0mm; via combining the extruding temperature and rolling temperature, obtaining the sheet with high plasticity or high strength; then cutting edge, coating protective film and packing. The invention has simple process, low cost, and high property, while the anti-drawing strength is 300MPa level.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, relates to the processing of magnesium alloy sheets, and in particular relates to a preparation method of a 300MPa grade, isotropic AZ31 magnesium alloy sheet. Background technique [0002] Magnesium alloys have the advantages of high specific strength, high specific stiffness, good thermal conductivity, good electrical conductivity, damping and vibration reduction, electromagnetic shielding, and easy recycling. Important materials in industrial fields such as automobiles and electronic communications. [0003] Sheets are the main product of magnesium alloys. Sheets are widely used in 3C products such as mobile phones, cameras, and notebook computers, as well as aircraft, cars, high-speed trains, bicycles and other vehicles. At present, the development direction of magnesium alloy sheet is to significantly reduce cost and improve performance to promote a large number of industr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16S1/00B23P15/00B21C37/02B21B37/74
Inventor 崔建忠乐启炽张志强
Owner NORTHEASTERN UNIV
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