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Containing yttrium-rich rare earth high-strength corrosion-resistant mg-al-zn-re extruded magnesium alloy and its production method and application

A technology of yttrium-rich rare earth and magnesium alloy is applied in the field of extrusion forming process of Mg-Al-Zn-RE magnesium alloy, which can solve the problem of large deformation resistance, low strength and corrosion resistance, magnesium Alloy oxidation and flammability and other problems, to achieve the effect of no fire hazard, low deformation resistance, easy production control

Inactive Publication Date: 2011-12-07
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

[0004] The first purpose of the present invention is to address the disadvantages of current AZ31 extruded magnesium alloys, such as low strength and corrosion resistance, high deformation resistance of close-packed hexagonal lattice crystals, and difficulty in extrusion molding, and magnesium alloys are oxidative and flammable, and can be processed and manufactured. The process has the disadvantage of a large fire hazard, and a high-strength and corrosion-resistant Mg-Al-Zn-RE extruded magnesium alloy containing yttrium-rich rare earth is proposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Example 1: AZ31+ rich Y (Er, Ho, Gd) (Y=0.1%, Er=0.15%, Ho=0.1%, Gd=0.2%) alloy containing yttrium-rich rare earth, high strength and corrosion resistance Mg-Al-Zn-RE extrusion Pressed magnesium alloy, its weight percentage ratio is: aluminum: 2.5%, zinc: 1.0%, Y: 0.1%, Er: 0.15%, Ho: 0.1%, Gd: 0.2%, impurity elements Fe≤0.02%, Cu≤ 0.002%, Si≤0.01%, Ni≤0.001%, and the balance is magnesium. The magnesium alloy ingot is heated to 340°C to 360°C through a resistance furnace, kept for 3 to 5 hours, and then extruded on a horizontal extruder with a mold temperature of 400°C to 420°C and an extrusion speed of 1.4 m / min ~1.8 m / min, and after stretching and straightening treatment, a high-strength corrosion-resistant magnesium alloy hot-extruded profile containing yttrium-rich rare earth is obtained. Alloy properties are shown in Table 1 and Table 2.

example 2

[0022] Example 2: AZ31+ rich Y (Er, Ho) (Y=0.9%, Er=0.1%, Ho=0.05%) alloy contains yttrium-rich rare earth high-strength corrosion-resistant Mg-Al-Zn-RE extruded magnesium alloy, its weight percentage The ratio is: Aluminum: 3.0%, Zinc: 1.2%, Y: 0.9%, Er: 0.1%, Ho: 0.05%, impurity elements Fe≤0.02%, Cu≤0.002%, Si≤0.01%, Ni≤0.001% , and the balance is magnesium. The magnesium alloy ingot is heated to 340°C-360°C through a resistance furnace, kept for 3-5 hours, and extruded on a horizontal extruder with a mold temperature of 400-420°C and an extrusion speed of 1.2 m / min ~1.5 m / min, and after stretching and straightening treatment, a high-strength corrosion-resistant magnesium alloy hot-extruded profile containing yttrium-rich rare earth is obtained. Alloy properties are shown in Table 1 and Table 2.

Embodiment 3

[0023] Example 3: AZ31+ rich Y (Er, Ho, Gd) (Y=1.5%, Er=0.12%, Ho=0.08%, Gd=0.1%) alloy containing yttrium-rich rare earth, high strength and corrosion resistance Mg-Al-Zn-RE Extruded magnesium alloy, its weight percentage ratio is: aluminum: 3.2%, zinc: 0.6%, Y: 1.5%, Er: 0.12%, Ho: 0.08%, Gd: 0.1%, impurity elements Fe≤0.02%, Cu ≤0.002%, Si≤0.01%, Ni≤0.001%, and the balance is magnesium. The magnesium alloy ingot is heated to 340°C-360°C through a resistance furnace, kept for 3-5 hours, and extruded on a horizontal extruder with a mold temperature of 400-420°C and an extrusion speed of 1.2 m / min ~1.4 m / min, and after stretching and straightening treatment, a high-strength corrosion-resistant magnesium alloy hot-extruded profile containing yttrium-rich rare earth is obtained. The properties of the alloy are shown in Table 1 and Table 2

[0024] Table 1 Comparison table of room temperature mechanical properties of Examples 1, 2, 3 of the present invention and AZ31

[0025] ...

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Abstract

The high-strength and corrosion-resistant Mg-Al-Zn-RE extruded magnesium alloy containing yttrium-rich rare earth and its production method and application relate to the field of light metal materials. Under the protection of SF6 and CO2 gases, magnesium-rich alloys are added to the molten AZ31 process. For yttrium master alloy, when the melt temperature is 720°C-740°C, it is refined and stirred with argon gas, and cast after standing to form a yttrium-rich high-strength corrosion-resistant magnesium alloy material. Heating to 340°C-360°C, keeping it warm for 3-5 hours, extruding on a horizontal extrusion machine, the mold temperature is 400-420°C, the extrusion speed is 1.2m / min-1.6m / min, after stretching calibration Direct processing to obtain a high-strength corrosion-resistant magnesium alloy hot-extruded profile containing yttrium-rich rare earth. The deformation process does not require a special fire protection process, with less material, high precision, thin thickness and light weight.

Description

technical field [0001] The invention relates to the field of light metal materials, in particular to the extrusion forming process of Mg-Al-Zn-RE magnesium alloy with high strength and corrosion resistance. Background technique [0002] Magnesium is favored by metal materials for its light weight, high specific steel strength, high specific strength, shock absorption and noise resistance, electromagnetic radiation resistance and easy recycling (no pollution), especially because magnesium alloys are suitable for manufacturing requirements for lightweight, The world trend of environmental protection and energy saving, magnesium resources are particularly rich, suitable for the strategic needs of sustainable development (while traditional metal resources such as iron and aluminum are becoming increasingly depleted), so magnesium alloys have become a research and development hotspot in countries all over the world. However, traditional magnesium alloys such as magnesium-aluminum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C1/03C22F1/06
Inventor 孟健张洪杰唐定骧鲁化一尹忠涛张文赵贵荣郝道德
Owner 扬州宏福铝业有限公司