Method for manufacturing magnesium alloy thin plate

A manufacturing method and magnesium alloy technology are applied in the field of manufacturing magnesium alloy sheets, which can solve the problems of coarse structure, low yield strength and low elongation of magnesium alloy products, and achieve fine and uniform grain structure, good surface finish and thin thickness. uniform effect

Active Publication Date: 2012-09-26
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of low yield strength, low tensile strength, low elongation, and coarse structure of magnesium alloy products in magnesium alloy thin plates prepared by existing casting methods or mechanical processing methods, and provides a high-performance magnesium alloy Manufacturing method of sheet
[0005] Advantages of the present invention: one, the magnesium alloy thin plate prepared by the present invention can be clearly seen by using 100 times optical metallographic microscope photos, the magnesium alloy thin plate prepared by the present invention can clearly see that the grain structure is small and uniform, which proves that The present invention solves the problem of the coarse structure of the magnesium alloy thin plate; two, the present invention adopts the extrusion production method to overcome the severe cracking in the rolling process of the magnesium alloy and the determination of the processing difficulty, and then carry out rolling research on the extruded strip, through The hot-rolled billet was cold-rolled with a small processing rate and multiple passes to produce a flat surface, uniform thickness, good surface finish, high-performance magnesium alloy sheet products, and a yield strength of 185MPa-205MPa, which is comparable to existing magnesium alloy products Compared with the increase of 13MPa~77MPa, the tensile strength is 265MPa~275MPa, compared with the existing magnesium alloy products, it is increased by 19MPa~71MPa, and the elongation is 19%~22%, which is 3% higher than the existing magnesium alloy products. %~9%

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  • Method for manufacturing magnesium alloy thin plate
  • Method for manufacturing magnesium alloy thin plate

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specific Embodiment approach 1

[0007] Specific embodiment one: the manufacturing method of a kind of magnesium alloy thin plate of this embodiment is specifically completed according to the following steps:

[0008] 1. Smelting: According to the mass fraction of Al in the magnesium alloy melt is 3.0% to 4.0%, the mass fraction of Zn is 0.20% to 0.8%, the mass fraction of Mn is 0.15% to 0.50%, and the mass fraction of Si is n, The mass fraction of Fe is m, the mass fraction of Cu is x, the mass fraction of Ni is y, the mass fraction of Be is z, and the mass fraction of Mg is 94.4% to 96.7%. Then the materials are added to the melting furnace , smelting at a temperature of 760°C to 780°C for 3h to 5h to obtain a magnesium alloy melt; 2. Casting: using a semi-continuous casting method to cast the aluminum alloy melt in step 1 at a casting temperature of 710°C to 730°C at a casting speed of 2.0m / h~2.4m / h, cooling water strength 0.03MPa~0.06MPa, and cooling water temperature 10℃~20℃ to make a magnesium alloy ing...

specific Embodiment approach 2

[0018]Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, the mass fraction of Al in the magnesium alloy melt is 3.2%~3.8%, the mass fraction of Zn is 0.40%~0.7%, Mn The mass fraction of Si is 0.20%-0.35%, the mass fraction of Si is 0.01%-0.09%, the mass fraction of Fe is 0.01%-0.04%, the mass fraction of Cu is 0.01%-0.04%, and the mass fraction of Ni is 0.001%. ~0.004%, the mass fraction of Be is 0.01%~0.04%, and the mass fraction of Mg is 95%~96%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 1, melting is carried out at a temperature of 765° C. to 775° C. for 3.5 hours to 4.5 hours. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a method for manufacturing a magnesium alloy thin plate. The invention aims to solve the problems of low yield strength, low tensile strength and low elongation percentage in the magnesium alloy thin plate manufactured by the conventional casting method or machining method and the problem of thick tissues of magnesium alloy products. The method comprises the following steps of: 1, melting; 2, casting; 3, annealing; 4, extruding; 5, performing hot rolling; and 6, performing cold rolling. The method is mainly used for manufacturing the magnesium alloy thin plates.

Description

technical field [0001] The invention relates to a manufacturing method of a magnesium alloy thin plate. Background technique [0002] Magnesium alloy has a series of outstanding advantages such as high specific strength, good damping performance, excellent shielding performance, and easy recycling, and has important application value in many fields. Especially in recent years, the increasing emphasis on environmental protection, energy saving and structural lightweight technologies has greatly increased the future expectations for the application of magnesium alloys. However, magnesium alloys have a close-packed hexagonal crystal structure, low symmetry, few slip systems, and poor plastic deformation and plastic processing properties. So far, most magnesium alloy products are mainly obtained by casting or machining. The yield strength of the magnesium alloy sheet prepared by the existing casting method or mechanical processing method is 128MPa-172MPa, the tensile strength ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C1/03C22F1/06
Inventor 王国军胡连喜王强王尔德刘显东
Owner NORTHEAST LIGHT ALLOY CO LTD
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