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Method and die for thinning microstructure of magnesium alloy material through continuous chill casting, squeezing and cutting

An alloy material and microstructure technology, which is used in the field of continuous chill casting, extrusion and shearing to refine the microstructure of magnesium alloy materials, can solve the problems that the effect of refining grains needs to be improved and is not obvious, and can shorten the production cycle and achieve a wide range of materials. , the effect of fast construction

Active Publication Date: 2013-10-09
重庆昱华新材料科技有限公司
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  • Application Information

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Problems solved by technology

However, due to the limitations of many such methods, the effect of refining grains needs to be improved, and the effect of refining the microstructure of magnesium alloy materials and improving the uniformity of magnesium alloy structures is not obvious.

Method used

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  • Method and die for thinning microstructure of magnesium alloy material through continuous chill casting, squeezing and cutting

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Embodiment Construction

[0023] The present invention will be further described below in combination with specific embodiments.

[0024] The method for continuous quenching casting, extrusion and shearing of the present invention to refine the microstructure of magnesium alloy materials is characterized in that it comprises the following steps:

[0025] 1. Inject the high-temperature or semi-solid magnesium alloy melt and the magnesium alloy composite modifier from the sprue cup into the inner cavity of the casting extrusion mold; the magnesium alloy composite modifier can be selected from a suitable formula in the prior art; a specific magnesium alloy composite modifier, which includes C 2 Cl 6 , Zr, CaCO 3 Three components, the mass ratio range of the three components is 1.5-2.5:0.8-1.8:0.7-1.6, and the quality of the modifier added is 0.1-0.12% of the mass of the high-temperature magnesium alloy melt; The best range of mass ratio is 2:1:1;

[0026] 2. A cooling water jacket is installed on the ...

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Abstract

The invention provides a method and a die for thinning the microstructure of a magnesium alloy material through continuous chill casting, squeezing and cutting. A liquid-stage magnesium alloy is used as a raw material; a water-cooled squeezing die with a chill water jacket arranged outside is used as a crystallizer; and molten metal in the die is cooled and solidified in the water-cooled crystallizer at a sub-high speed, then is in a solid state or a semisolid state, and bears an external force for continuous squeezing and cutting so as to prepare a magnesium alloy bar (sectional material). By the method, the defects of shrinkage cavities and looseness in a magnetic alloy cast structure are overcome, the microstructure and the mechanical properties of a part can be improved, a thinned surface fine crystalline structure is obtained, and the production cost and the tonnage of molding equipment can be reduced; and the thinned microstructure of the magnesium alloy material has the characteristics of sub-high speed solidification and plastic deformation under the action of three-direction squeezing pressures and continuous cutting, and can be used for producing difficultly-deformable alloy bars (sectional materials), and the mechanical properties are improved. The method can also be used for recovering magnesium-aluminum alloys, so that magnesium-aluminum alloy materials are reused.

Description

technical field [0001] The invention relates to a non-ferrous metal plastic forming technology, the preparation of high-strength and toughness magnesium alloy or other alloy fine-grained materials and the production of profiles; in particular, it relates to a method and a mold for continuous chilled casting, extrusion and shearing to refine the microstructure of magnesium alloy materials. Background technique [0002] Magnesium alloy is the lightest metal material for engineering structures. It has the characteristics of low density, high specific strength, good electrical conductivity and electromagnetic shielding performance, good vibration reduction and damping performance, and easy recycling; magnesium alloy is widely used in portable In the equipment and automobile industries, to achieve the purpose of lightweight. Magnesium alloys can be used in automobiles, aerospace, and 3C products (household appliances, computers, communication electronic devices) and other fields....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D27/00B22D27/04B22D27/11
Inventor 胡红军黄伟九杨明波夏华周志明
Owner 重庆昱华新材料科技有限公司
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