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Wrought magnesium alloy for high-speed extrusion and preparation method thereof

A technology for deforming magnesium alloys and magnesium alloys, applied in the field of metal processing, can solve the problems of low mechanical properties, inability to form enough pinned grains, increase production costs, etc., and achieve high mechanical properties

Active Publication Date: 2011-06-29
JIANGSU FAVOUR AUTOMOTIVE NEW STUFF SCI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After searching the prior art, it was found that Zhang Qinglai, Lu Chen, Ding Wenjiang, research on split extrusion magnesium alloy pipe technology ("Light Alloy Processing Technology", 2003, 31(10), 28-30) disclosed a method using Magnesium alloy pipe extrusion production method with split die, the extrusion billet adopts AZ31B alloy continuous casting rod, the extrusion speed is 0.5-1.5m / min, because the extrusion of the produced pipe is relatively large, so with the extrusion speed Increase, the temperature rise during the extrusion process also increases, and the temperature at the exit of the die rises sharply, which will cause significant grain growth of the extruded product, and even cause cracks on the surface of the extruded product
[0005] Further searches found that Yuan Guangyin, Sun Yangshan, Zhang Weimin, and the influence of Bi on the microstructure and mechanical properties of cast magnesium alloys ("Casting", 1998, 5, p5-7) recorded that the strengthening phase in AZ31 alloy is only Mg 17 al 12 , due to its low high temperature stability, it will melt away during extrusion and cannot form enough pinning to prevent grain growth, making the mechanical properties of the extruded product lower
To maintain high mechanical properties of the extruded product, the extrusion speed of the AZ31 alloy should not be greater than 10m / min, which indirectly increases the production cost

Method used

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  • Wrought magnesium alloy for high-speed extrusion and preparation method thereof
  • Wrought magnesium alloy for high-speed extrusion and preparation method thereof
  • Wrought magnesium alloy for high-speed extrusion and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The weight percentage of each component of the alloy is: 3% Al, 0.1% Mn, 0.5% Si, 0.3% Ce, 0.5% Y, 0.1% Sr, 0.6% Sb, and the rest is Mg 9995 .

[0015] Prepare the alloy according to the above ingredients, heat the industrial magnesium alloy melting furnace to 400-500°C, add pure magnesium ingots (Mg 9995 ), pure aluminum ingots and pure silicon, after the pure magnesium ingots, aluminum ingots and pure silicon are all melted and stirred, add Al-Mn preheated to about 200°C 10 , Mg-Ce 25 , Mg-Y 60 , Al-Sr 10 Intermediate alloy, after the alloy is completely melted, raise the temperature of the alloy solution to 730-780°C, add pure antimony, add magnesium alloy refining agent for refining after stirring, keep the temperature for 20-60 minutes, then lower the temperature of the alloy solution to 690- Cast at 760°C into a solid round ingot for extrusion.

[0016] The alloy ingot is extruded at 420°C, and when the extrusion speed is 15m / min, the mechanical properties of...

Embodiment 2

[0019] The weight percentage of each component of the alloy is: 5% Al, 0.5% Mn, 2% Si, 1% Ce, 0.2% Y, 1Sr, 1% Sb, and the rest is Mg 9995 .

[0020] Prepare the alloy according to the above ingredients, heat the industrial magnesium alloy melting furnace to 400-500°C, add pure magnesium ingots (Mg 9995 ), pure aluminum ingots and pure silicon, after the pure magnesium ingots, aluminum ingots and pure silicon are all melted and stirred, add Al-Mn preheated to about 200°C 15 , Mg-Ce 35 , Mg-Y 25 , Al-Sr 30 Intermediate alloy, after the alloy is completely melted, raise the temperature of the alloy solution to 730-780°C, add pure antimony, add magnesium alloy refining agent for refining after stirring, keep the temperature for 20-60 minutes, then lower the temperature of the alloy solution to 690- Cast at 760°C into a solid round ingot for extrusion.

[0021] The alloy ingot is extruded at 420°C, and when the extrusion speed is 15m / min, the mechanical properties of the extru...

Embodiment 3

[0024] The weight percentage of each component of the alloy is: 8% Al, 1% Mn, 3% Si, 2% Ce, 1% Y, 0.5% Sr, 0.3% Sb, and the rest is Mg 9995 .

[0025] Prepare the alloy according to the above ingredients, heat the industrial magnesium alloy melting furnace to 400-500°C, add pure magnesium ingots (Mg 9995 ), pure aluminum ingots and pure silicon, after the pure magnesium ingots, aluminum ingots and pure silicon are all melted and stirred, add Al-Mn preheated to about 200°C 20 , Mg-Ce 50 , Mg-Y 90 , Al-Sr 20 Intermediate alloy, after the alloy is completely melted, raise the temperature of the alloy solution to 730-780°C, add pure antimony, add magnesium alloy refining agent for refining after stirring, keep the temperature for 20-60 minutes, then lower the temperature of the alloy solution to 690- Cast at 760°C into a solid round ingot for extrusion.

[0026] The alloy ingot is extruded at 420°C, and when the extrusion speed is 15m / min, the mechanical properties of the ext...

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Abstract

The invention relates to wrought magnesium alloy for high-speed extrusion and a preparation method thereof, belonging to the technical field of metal processing, the weight percentage of components of the metal alloy is: 2-9% of Mn, 0.1-1% OF Si, 0.1-3% of Ce, 0.1-2% of Y, 0.1-1% of Sr, 0.1-1% of Sb, and the balance of Mg9995. The prepared metal alloy by the invention can carry out the high-speedextrusion production the extrusion speed of which is less than 15m / min, and can not dissolve during the process of the extrusion, the product after finishing the extrusion has higher mechanical properties, is suitable for automobile parts such as automobile window frame, seat framework and the like, and can also be extruded into a bar as part blank of aerospace field.

Description

technical field [0001] The invention relates to an alloy in the technical field of metal processing and a preparation method thereof, in particular to a deformed magnesium alloy for extrusion at a speed not less than 15m / min and a preparation method thereof. Background technique [0002] Magnesium alloy is one of the metal structural materials with the smallest density, and is known as "21st century commercial green environmental protection and ecological metal structural materials". In recent years, the rapid development of the automobile industry and the urgent requirements for automobile lightweight (energy saving, safety, and environmental protection) have led to a rapid increase in the use of magnesium alloys in automobiles. Wrought magnesium alloy materials can provide plates, rods, profiles and forgings of various sizes, and can obtain higher strength, better ductility and more diverse mechanical properties through material structure control and heat treatment process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C1/03
Inventor 王迎新彭立明蒋海燕丁文江
Owner JIANGSU FAVOUR AUTOMOTIVE NEW STUFF SCI TECH
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