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Mg-Al-Zn-RE wrought magnesium alloy containing Ce-La mixed rare earth and production method and application thereof

A technology of deforming magnesium alloys and mixed rare earths, applied in the field of light metal materials, can solve the problems of high deformation resistance, low strength and corrosion resistance of densely packed hexagonal crystals, and the oxidation and flammability of magnesium alloys, so as to achieve light weight and easy The effect of production control and less material consumption

Active Publication Date: 2010-09-08
扬州宏福铝业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to aim at the strength and corrosion resistance of the current industrial AZ31 extruded magnesium alloy, the strength and corrosion resistance of the close-packed hexagonal crystals are large, and the weaknesses of being difficult to be extruded are difficult, and the magnesium alloy is oxidative and flammable. Due to the disadvantages of large fire hazards in the processing and manufacturing process, a Mg-Al-Zn-RE deformed magnesium alloy containing cerium-lanthanum mixed rare earth is proposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: AZ31+Ce+La (Ce=0.06%, La=0.04%) alloy:

[0026] The heat-resistant and corrosion-resistant Mg-Al-Zn-RE deformed magnesium alloy containing cerium and lanthanum mixed with rare earths has the following composition weight percentages: aluminum: 2.8%, zinc: 1.0%, Ce: 0.06%, La: 0.04%, impurity element Fe ≤0.02%, Cu≤0.002%, Si≤0.01%, Ni≤0.001%, and the balance is magnesium. The Mg-Al-Zn-RE deformed magnesium alloy containing cerium-lanthanum mixed with rare earths is heated to 330-350°C in a resistance furnace, kept for 3-5 hours, and extruded on a horizontal extruder with a mold heating temperature of 380 ~400°C, heat preservation for 3~5 hours, extrusion speed 1.5~1.8 m / min, and stretching and straightening treatment, to obtain hot extruded profiles of Mg-Al-Zn-RE wrought magnesium alloy containing cerium-lanthanum mixed rare earth . Alloy properties are shown in Table 1 and Table 2.

Embodiment 2

[0027] Embodiment 2: AZ31+Ce+La (Ce=0.6%, La=0.3%) alloy:

[0028] Mg-Al-Zn-RE wrought magnesium alloy containing cerium-lanthanum mixed rare earth with high heat resistance, corrosion resistance and mechanical properties, the composition weight percentages are: aluminum: 2.5%, zinc: 1.3%, Ce: 0.6%, La: 0.3 %, impurity elements Fe≤0.02%, Cu≤0.002%, Si≤0.01%, Ni≤0.001%, and the balance is magnesium. The Mg-Al-Zn-RE deformed magnesium alloy containing cerium-lanthanum mixed with rare earths is heated to 330-350°C in a resistance furnace, kept for 3-5 hours, and extruded on a horizontal extruder with a mold heating temperature of 380 ~400°C, heat preservation for 3-5 hours, extrusion speed 1.6-2.2 m / min, after stretching and straightening, the hot extrusion profile of Mg-Al-Zn-RE wrought magnesium alloy containing cerium-lanthanum mixed rare earth is obtained. Alloy properties are shown in Table 1 and Table 2;

Embodiment 3

[0029] Embodiment 3: AZ31+Ce+La (Ce=1.0%, La=0.5%,) alloy:

[0030] Mg-Al-Zn-RE wrought magnesium alloy containing cerium-lanthanum mixed rare earth with high heat resistance, corrosion resistance and mechanical properties, the composition weight percentages are: aluminum: 3.0%, zinc: 0.7%, Ce: 1.0%, La: 0.5 %, impurity elements Fe≤0.02%, Cu≤0.002%, Si≤0.01%, Ni≤0.001%, and the balance is magnesium. The Mg-Al-Zn-RE deformed magnesium alloy containing cerium-lanthanum mixed with rare earths is heated to 330-350°C in a resistance furnace, kept for 3-5 hours, and extruded on a horizontal extruder with a mold heating temperature of 380 ~400°C, heat preservation for 3-5 hours, extrusion speed 1.8-2.5 m / min, stretching and straightening, to obtain a hot-extruded profile of Mg-Al-Zn-RE wrought magnesium alloy containing cerium-lanthanum mixed rare earth. Alloy properties are shown in Table 1 and Table 2;

[0031] The room temperature mechanical property table of table 1 embodiment ...

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Abstract

The invention relates to an Mg-Al-Zn-RE wrought magnesium alloy containing Ce-La mixed rare earth as well as a production method and application thereof, belonging to the field of light metal materials. The preparation method comprises the following steps of: adding Mg-Ce-La intermediate alloy in the process of melting AZ31 of Mg, Al and Zn under the protection of gases of SF6 and CO2; introducing argon when the temperature of a melt is 710-730 DEG C, refining and stirring; standing, and then casting to form the Mg-Al-Zn-RE wrought magnesium alloy containing Ce-La mixed rare earth; heating to 330-350 DEG C, keeping the temperature for 3-5h, extruding on a horizontal extruder, wherein the temperature of a mould is 380-400 DEG C and the extruding speed is 1.5-2.5m / min; and stretching and straightening to obtain a heat resistant and anti-corrosion magnesium alloy thermal extruded section containing Ce-La mixed rare earth. The invention needs no special fire protection process in the deformation process and has less material consumption, high precision, small thickness and light weight.

Description

technical field [0001] The invention relates to the field of light metal materials, in particular to an extrusion forming process of a Mg-Al-Zn-RE deformed magnesium alloy containing cerium-lanthanum mixed rare earths with heat resistance, corrosion resistance and mechanical properties. Background technique [0002] Cerium-lanthanum mixed light rare earth: it is to separate the rare and precious praseodymium (Pr) and neodymium (Nd) from commonly used (commercially available) mixed rare earths (including Ce, La, Pr, Nd) Raw materials for magnetic materials) a large amount of cerium-lanthanum mixed rare earths remaining. Since the main components of commonly used mixed rare earths are Ce 45%-50%, La 21%-30%, Pr 5%-7%, and Nd 12%-17%, because every ton of didymium-praseodymium rare earth is produced, about Produce 3.5-4 tons of cerium-lanthanum mixed rare earths. China consumes 25,000 to 30,000 tons of neodymium and praseodymium for the production of NdFeB every year. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/03B21C23/02B21C31/00
Inventor 尹忠涛孟健张洪杰唐定骧鲁化一张文赵贵荣郝道德
Owner 扬州宏福铝业有限公司
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