Magnesium alloy containing rare earth element and preparation method thereof

A technology of magnesium alloy and rare earth magnesium, which is applied in the field of magnesium alloy containing rare earth and its manufacture, can solve the problems of poor surface quality and unsuitable surface decoration coating, etc., and achieve the effect of excellent casting performance

Active Publication Date: 2008-06-04
靖江市顺海汽贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Ordinary die-casting magnesium alloys have poor surface quality due to casting performance, and their products are not suitable for electroplating and other surface decoration coating treatments

Method used

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  • Magnesium alloy containing rare earth element and preparation method thereof
  • Magnesium alloy containing rare earth element and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A method for manufacturing a magnesium alloy containing beryllium, comprising the steps of:

[0031] (1) Prepare the first magnesium alloy molten solution that does not contain rare earths, adopt a crucible resistance furnace, melt the pure magnesium ingot containing Mg99.95% under the protection of flux, and add the aluminum ingot containing 99.90% Al and Zinc ingots containing 99.99% of Zn and electrolytic manganese powder containing 99.78% of Mn are refined and slag removed after melting according to the metering ratio to obtain the first magnesium alloy molten solution not containing rare earth, wherein the first magnesium alloy The weight percentage of the alloy is: aluminum 3.0%, zinc 12%, manganese 0.15%, the rest is magnesium and unavoidable impurities;

[0032] (2) Preparation of rare earth magnesium master alloy, in the electrolytic furnace, with potassium chloride, magnesium chloride and lanthanum praseodymium neodymium cerium chloride as electrolyte, with gr...

Embodiment 2

[0038] The manufacturing method is the same as in Example 1. Wherein, the weight percentage of the first magnesium alloy in the preparation method is: aluminum 4.5%, zinc 14%, manganese 0.40%, the rest is magnesium and unavoidable impurities; the content of mixed rare earth in the rare earth magnesium master alloy is 22.0%, The rest is magnesium and unavoidable impurities; the weight percentage of aluminum-beryllium alloy is: beryllium 1.0%, and the rest is aluminum and unavoidable impurities.

[0039] Among them, the weight percentage of the rare earth magnesium master alloy is: the total rare earth content is 22.0%, the content of each element of Cu, Si, Mn, Ti, Ni, Cr, Zr, Fe, Zn, Pb, Sn is not more than 0.1%, and the rest for magnesium.

[0040] The weight percentage of the final magnesium alloy is composed of: Al5.0%, Zn15%, Mn0.50%, Be0.0013%, mixed rare earth RE2.0%, Cu≤0.030%, Fe≤0.005%, Si≤0.10 %, Ni≤0.002%, and the rest is Mg. RE is a mixed rare earth with a ceriu...

Embodiment 3

[0042] A method for manufacturing a magnesium alloy not containing beryllium, the method comprising the following steps:

[0043] (1) Prepare the first magnesium alloy molten solution that does not contain rare earths, adopt a crucible resistance furnace, melt the pure magnesium ingot containing Mg99.95% under the protection of flux, and add the aluminum ingot containing 99.90% Al and Zinc ingots containing 99.99% of Zn and electrolytic manganese powder containing 99.78% of Mn are refined and slag removed after melting according to the metering ratio to obtain the first magnesium alloy molten solution not containing rare earth, wherein the first magnesium alloy The weight percentage of the alloy is: aluminum 3.5%, zinc 13%, manganese 0.35%, the rest is magnesium and unavoidable impurities;

[0044] (2) Preparation of rare earth magnesium master alloy, in the electrolytic furnace, with potassium chloride, magnesium chloride and lanthanum praseodymium neodymium cerium chloride a...

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Abstract

The invention relates to a magnesium alloy containing rare earths and is characterized in that: the weight percentage of compositions of the magnesium alloy is that: aluminum: 2.5 to 8.0 percent; zinc: 10 to 20 percent; manganese: 0.15 to 0.50 percent; beryllium: 0.0005 to 0.0015 percent; mischmetal: 0.5 to 5.0 percent; the residual is magnesium and unavoidable impurities; the mischmetal is cerium mischmetal with cerium content of 40.0 to 60.0 percent, and the residual is other rare earths except for cerium, for example, lanthanum, neodymium and so on. The invention also provides a preparation method for the magnesium alloy. The invention has the advantages of good fluidity of the magnesium alloy, high casting performance and compact alloy surface. By adoption of the magnesium alloy of the invention for die casting, magnesium alloys with more ideal electroplating treatment and other painting treatment for surface decoration can be obtained.

Description

technical field [0001] The invention relates to a rare earth-containing magnesium alloy and a manufacturing method thereof. Background technique [0002] Magnesium alloys have excellent specific strength, specific stiffness, heat dissipation and electromagnetic shielding properties, and their applications in computers, communications, and consumer electronics have been greatly developed. [0003] Mg-Al-Zn alloys are the earliest developed and widely used. Its main features are high strength, heat treatment strengthening, and good casting performance. But its yield strength and heat resistance are not high. Aluminum is the main element in the alloy system, and its main function is to increase the room temperature strength of the alloy and impart heat treatment strengthening effect. The solubility of aluminum in magnesium is very large, which is 12.27% at the eutectic temperature (437°C). When the temperature drops, the solubility decreases rapidly, and it is only 2.0% at ...

Claims

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Application Information

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IPC IPC(8): C22C23/04
Inventor 关洪国
Owner 靖江市顺海汽贸有限公司
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