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Heatproof and anticorrosion rare earth magnesium alloy with high obdurability and preparation method thereof

A rare earth magnesium and heat-resistant technology, which is applied in the field of high-strength, heat-resistant and corrosion-resistant rare earth magnesium alloys, can solve the problems of restricting the use of alloys and reducing the corrosion resistance of alloys, so as to eliminate the reduction of mechanical properties, improve mechanical properties, and improve durability. performance effect

Active Publication Date: 2012-09-05
JIANGSU FAVOUR AUTOMOTIVE NEW STUFF SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recent studies have found that the addition of Sb to the Mg-Al-RE magnesium alloy reduces the corrosion resistance of the alloy, thus limiting the use of the alloy

Method used

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  • Heatproof and anticorrosion rare earth magnesium alloy with high obdurability and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] According to the proportion by weight, 5% of aluminum (Al), 0.4% of manganese (Mn), 0.8% of yttrium (Y), 0.3% of antimony (Sb), 0.8% of cadmium (Cd), and the rest are magnesium (Mg) Alloy materials are prepared. After the industrial pure magnesium is completely melted in the crucible under the flux or gas protection melting conditions, at 660 ° C, the industrial pure aluminum, aluminum manganese (Al-Mn) intermediate alloy and magnesium yttrium Add alloying elements in the form of (Mg-Y) master alloy. After the added charge is completely dissolved into alloy melt, the temperature is raised to 710°C, and then industrial pure antimony and industrial pure cadmium are pressed into the alloy melt from the bell jar. , stir and mix evenly and continue to heat up to 710°C, then add refining agent to refine the magnesium alloy liquid and refine for 10 minutes, and pour after standing for 20 minutes to obtain the high-strength, toughness, heat-resistant and heat-resistant alloy wit...

Embodiment 2

[0022]According to the proportion by weight, 5% of aluminum (Al), 0.1% of manganese (Mn), 2.5% of yttrium (Y), 1.0% of antimony (Sb), 0.5% of cadmium (Cd), and the rest are magnesium (Mg) Alloy materials are prepared. After the magnesium is completely melted in the crucible under the flux or gas protection melting conditions, at 650 ° C, industrial pure aluminum, aluminum manganese (Al-Mn) intermediate alloy and magnesium yttrium (Mg -Y) Alloying elements are added in the form of intermediate alloys. After the added charge is completely dissolved into an alloy melt, the temperature is raised to 690°C, and then industrial pure antimony and industrial pure cadmium are pressed into the alloy melt from the bell jar and stirred. Mix well and continue to heat up to 730°C, then add refining agent to refine the magnesium alloy solution for 5 minutes, and pour after standing for 10 minutes to obtain the high-strength, toughness, heat-resistant and corrosion-resistant rare earth with exc...

Embodiment 3

[0024] According to the proportion by weight, 3% of aluminum (Al), 0.4% of manganese (Mn), 0.8% of yttrium (Y), 0.3% of antimony (Sb), 0.3% of cadmium (Cd), and the rest are magnesium (Mg) Alloy materials are prepared. After the industrial pure magnesium is completely melted in the crucible under the flux or gas protection melting conditions, at 670 ° C, the industrial pure aluminum, aluminum manganese (Al-Mn) intermediate alloy and magnesium yttrium Add alloying elements in the form of (Mg-Y) master alloy. After the added charge is completely dissolved into alloy melt, the temperature is raised to 695°C, and then industrial pure antimony and industrial pure cadmium are pressed into the alloy melt from the bell jar. , stir and mix evenly and continue to heat up to 725 ° C, then add refining agent to refine the magnesium alloy solution for 15 minutes, and then pour it after standing for 15 minutes to obtain the high-strength, toughness, heat-resistant and heat-resistant alloy wi...

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Abstract

The invention provides a heatproof and anticorrosion rare earth magnesium alloy with high obdurability and a preparation method thereof, belonging to the technical field of light metal material. The rare earth magnesium alloy comprises the following components in proportion by weight: 3-5% of aluminum (Al), 0.1-0.4% of manganese (Mn), 0.8-2.5% of yttrium (Y), 0.3-1.0% of stibium (Sb), 0.3-1% of cadmium (Cd) and balance of magnesium (Mg). The invention has the advantages of solving the problem of reduction of mechanical properties caused by the splitting effect of a bulky Al2Y relative matrix in the alloy structure, improving the obdurability of the alloy and the mechanical properties of the alloy under room temperature and high temperature by making the most of the solution strengthening effect and refined crystalline strengthening effect of the Sb, Y and other elements and the dispersion strengthening effect of the high melting point YSb particle phase mass points, further improving the mechanical properties of the alloy by the grain refinement effect and the solution strengthening effect of the Cd element, and improving the anticorrosion performance of the alloy by improving theelectrode potential of the alloy matrix by the Cd element, so that the obdurability, heatproof performance and anticorrosion performance of the alloy are higher than that of the existing AE series magnesium alloy. The technological requirements for the preparation method provided by the invention are not harsh, and the preparation method can meet the industrialized enlarged production requirements and ensure thorough embodiment of the two technical effects.

Description

technical field [0001] The invention belongs to the technical field of light metal materials, and in particular relates to a high-strength, heat-resistant and corrosion-resistant rare earth magnesium alloy, and also relates to a preparation method thereof. Background technique [0002] Magnesium, the atomic number is 12, the relative atomic mass or molecular weight is 24.305, the crystal structure is hexagonal close packed (hcp structure), and the melting point of magnesium is 650°C. Magnesium is one of the most abundant metals on the earth's surface (ranking sixth). It is the lightest metal structure material used in engineering so far. It has high specific strength, specific stiffness, excellent electromagnetic shielding performance, and excellent damping reduction. It is known as a green engineering material with development and application potential and prospects in the 21st century. It is used in aerospace, automobile and 3C industries (3C industries: computers, communi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C1/03
Inventor 刘子利李健周贵斌李娟刘希琴
Owner JIANGSU FAVOUR AUTOMOTIVE NEW STUFF SCI TECH
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