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A kind of rapidly extruding magnesium alloy and its preparation method

A technology for extrusion forming and magnesium alloys, which is applied in the field of rapid extrusion forming magnesium alloys and its preparation, can solve the problems of low extrusion speed and increase the production cost of magnesium alloys, and achieve the effect of low manufacturing cost

Active Publication Date: 2020-08-14
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned extruded magnesium alloys have a bottleneck in the industrial application of low extrusion speed. Usually, the applicable extrusion speed of AZ series magnesium alloys is only 20-30m / min, which is only one-fifth of the extrusion speed of common aluminum alloys. One (the extrusion speed of 2024 aluminum alloy can be as high as 100m / min), which also greatly increases the preparation cost of the corresponding magnesium alloy

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  • A kind of rapidly extruding magnesium alloy and its preparation method

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preparation example Construction

[0024] The preparation method of the rapidly extruded Mg alloy of the present invention comprises the following steps:

[0025] (1) Heat up and melt pure Mg under the protection of protective gas or flame-retardant covering, and heat the intermediate alloys such as Mg-Ca alloy, Mg-Sn alloy, Mg-Mn alloy and Mg-Ce alloy at 160-250 °C 5-15 minutes.

[0026] (2) Raise the temperature of pure Mg melt to 650-800°C, add Mg-Ca alloy, Mg-Sn alloy and Mg-Mn alloy to melt the added alloy; then raise the temperature of the prepared Mg alloy melt to 750- At 850°C, add Mg-Ce alloy to melt the added alloy to form alloy melt.

[0027] (3) Remove scum on the surface of the Mg alloy melt, stir the Mg alloy melt for 3-30 minutes, then raise the temperature to 750-850° C., and let stand for 20-100 minutes.

[0028] (4) Cooling the Mg alloy melt to the casting temperature for continuous casting to prepare Mg-Sn-Ce-Mn-Ca continuous casting ingots, the continuous casting speed is 20-2000mm / min, an...

Embodiment 1

[0034] (1) Configure each alloy element according to the alloy composition, wherein the weight percentages of Sn, Ca, Mn, and Si are respectively 0.1%, 1%, 0.5%, and 0.1%. Pure Mg and Mg-Ca, Mg-Sn, Mg-Mn and Mg-Ce were preheated to 200°C, and then pure Mg was placed in the 6 Melting in a furnace with protective gas. (2) After the pure Mg is completely melted, add the preheated Mg-Ca, Mg-Sn and Mg-Mn master alloys to the Mg melt, and raise the temperature of the melt to 800°C after all the added master alloys are melted Finally, add Mg-Ce master alloy to the alloy melt. (3) After all the added alloying elements are melted, skim off the scum on the surface, then stir for 10 minutes, and finally raise the temperature of the Mg alloy melt to 800° C. and let it stand for 60 minutes. (4) Cooling the Mg alloy melt after standing to an appropriate temperature to prepare continuous casting slabs by continuous casting, the continuous casting speed range is 20-2000mm / min, and the conti...

Embodiment 2

[0036] (1) Configure each alloy element according to the alloy composition, wherein the weight percentages of Sn, Ca, Mn, and Si are respectively 0.1%, 1%, 0.5%, and 0.1%. Pure Mg and Mg-Ca, Mg-Sn, Mg-Mn and Mg-Ce were preheated to 200°C, and then pure Mg was placed in the 6Melting in a furnace with protective gas. (2) After the pure Mg is completely melted, add the preheated Mg-Ca, Mg-Sn and Mg-Mn master alloys to the Mg melt, and raise the temperature of the melt to 800°C after all the added master alloys are melted Finally, add Mg-Ce master alloy to the alloy melt. (3) After all the added alloying elements are melted, skim off the scum on the surface, then stir for 10 minutes, and finally raise the temperature of the Mg alloy melt to 800° C. and let it stand for 60 minutes. (4) Cooling the Mg alloy melt after standing to an appropriate temperature to prepare continuous casting slabs by continuous casting, the continuous casting speed range is 20-2000mm / min, and the contin...

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Abstract

The invention relates to the technical field of metal metallurgy, in particular to magnesium alloy capable of being fast extruded and formed and a preparation method thereof. The magnesium alloy is prepared from ingredient alloy elements of 0.1 to 1 percent of tin, 0.1 to 1 percent of Ca, 0.1 to 0.5 percent of Mn, 0.1 to 0.5 percent of Ce and the balance of magnesium in percentage by weight, wherein the total weight percentage of the four kinds of alloy elements does not exceed 2 percent. According to the preparation method, after the pure magnesium is preheated and molten, Mg-Sn, Mg-Mn, Mg-Ceand Mg-Ca intermediate alloy are respectively added; after all added metal is molten, refining is performed; a continuous casting method is used for the refined magnesium alloy melt to prepare the magnesium alloy applicable to fast extrusion deformation. The prepared Mg-Sn-Ca-Mn-Ce wrought magnesium alloy can be fast extruded and shaped into required parts at the extrusion speed of 60 to 80m / min;the cost of the wrought magnesium alloy parts can be effectively reduced by 30 to 50 percent. Meanwhile, common alloy elements are added in the alloy; the content is low; the manufacturing cost is low; the magnesium alloy is applicable to industrial application.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a rapidly extruded magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is an alloy composed of magnesium and other elements. Its characteristics are: low density (1.8g / cm 3 Left and right), high strength, large elastic modulus, good heat dissipation, good shock absorption, greater impact load capacity than aluminum alloy, good corrosion resistance to organic matter and alkali, mainly used in aviation, aerospace, transportation, chemical industry, rockets, etc. Industrial sector. Under the dual pressure of the world's petrochemical energy crisis and environmental pollution, weight reduction is one of the important means to achieve energy efficiency. Countries have put forward weight reduction requirements for industrial fields such as automobiles and aerospace. The density of magnesium alloys is only that of aluminum. It is two...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22F1/06
Inventor 郑兴伟曹宇王世明褚振华张丽珍梁拥成庄欣袁杰
Owner SHANGHAI OCEAN UNIV