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High and medium-strength magnesium alloy and preparation method thereof

A magnesium alloy, high-strength technology, applied in high-speed extrusion aging-free medium and high-strength magnesium alloy and its manufacturing field, can solve the problems of low yield, poor plastic processing performance of magnesium alloy, low production efficiency, etc., and achieve low content of impurity elements , Low manufacturing cost and fast extrusion speed

Pending Publication Date: 2019-05-17
鹤壁恒镁新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the plastic processing performance of magnesium alloy is poor, the yield rate is low, and the production efficiency is also low. Moreover, it is difficult to further secondary forming of deformed magnesium alloy, the cost of secondary processing is high, and it is difficult to popularize and apply. The alloy development and application of deformed magnesium alloy plates, profiles and pipes The research and development of manufacturing process is the short board for realizing the large-scale application of magnesium alloy at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this embodiment, the composition formula of the high-speed extrusion aging-free medium-high strength magnesium alloy is as follows: Zn5%, Mn 0.3, Ce-La2%, Al 0.6%, Ti 0.006%, Ca 0.02%, Be 0.003%, Si≤0.02%, Fe≤0.005%, Cu≤0.05%, Ni≤0.005%, and the rest is Mg.

[0037] The preparation process of the magnesium alloy will be described below.

[0038] Put 920.89Kg pure magnesium ingot and 30Kg 2# flux into the crucible, raise the temperature to 720°C to fully melt the magnesium ingot, then put in 50Kg of pure zinc, 3Kg of pure manganese, 20Kg of cerium-lanthanum mixed rare earth, Pure aluminum 6Kg, pure titanium 0.06Kg, pure beryllium 0.03Kg, pure calcium 0.2Kg. After all the alloy is melted, slowly add a certain amount of 5# flux for refining at 650°C for 20 minutes, then carry out argon refining for 10 minutes, and finally leave it for 3 hours before casting the magnesium alloy billet of required size. In this embodiment, the amount of 5# flux added can be 3% of the ma...

Embodiment 2

[0042] The composition formula of the high-speed extrusion aging-free medium-high-strength magnesium alloy in this embodiment is by weight percentage: Zn6%, Mn 0.3, Ce-La3%, Al 0.6%, Ti 0.006%, Ca 0.02%, Be 0.003%, Si≤ 0.02%, Fe≤0.005%, Cu≤0.05%, Ni≤0.005%, and the rest is Mg.

[0043] The preparation process of the magnesium alloy will be described below.

[0044] Put 910.89Kg pure magnesium ingot and 30Kg2# flux into the crucible, heat up to 750°C to melt the magnesium ingot and continue, then put in 60Kg of pure zinc, 3Kg of pure manganese, 30Kg of cerium-lanthanum mixed rare earth respectively after the former metal is melted, 6Kg of pure aluminum, 0.06Kg of pure titanium, 0.2Kg of pure calcium, and 0.03Kg of pure beryllium (the master alloy of the same proportion is also acceptable). After all the alloy is melted, slowly add 5# flux with 4% of the melt mass to carry out refining at 700°C for 25 minutes, then carry out argon refining for 20 minutes, and finally start cast...

Embodiment 3

[0047] The composition formula of the high-speed extrusion aging-free medium-high-strength magnesium alloy in this embodiment is: Zn 6.8%, Mn 0.3, Ce(La) 4%, Al 0.6%, Ti 0.006%, Ca 0.02%, Be 0.003 %, Si≤0.02%, Fe≤0.005%, Cu≤0.05%, Ni≤0.005%, and the rest is Mg.

[0048] The preparation process of the magnesium alloy will be described below.

[0049] Put 964.10Kg of pure magnesium ingot and 30Kg2# flux into the crucible, continue to heat up to 780°C after melting, and then put in 68Kg of pure zinc, 3Kg of pure manganese, 40Kg of cerium-lanthanum mixed rare earth, pure aluminum respectively after the former metal is melted. 6Kg, pure titanium 0.06Kg, pure calcium 0.2Kg, pure beryllium 0.03Kg (master alloy with the same ratio is also acceptable). After all the alloy is melted, slowly add 5# flux of 5% of the mass of the melt to carry out refining at 720°C for 30 minutes, then carry out argon refining for 30 minutes, and finally stand still for 5 hours before casting to obtain a ...

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Abstract

The invention provides high and medium-strength magnesium alloy and a preparation method thereof. The high and medium-strength magnesium alloy comprises the following components in percentage by weight: 1-9% of Zn, 0.1-1% of Mn, 0.1-1% of Al, 0-5% of Ce(La), 0-0.3% of Ti, 0-0.1% of Ca, 0-0.05% of Be, equal to or less than 0.02% of Si, equal to or less than 0.005% of Fe, equal to or less than 0.05%of Cu, equal to or less than 0.005% of Ni and the balance of Mg. According to the preparation method, the extruding speed of later-period extruding processing of magnesium alloy is high, aging treatment is not needed after extrusion, the strength is high, the content of impurity elements is low, and the manufacturing cost is low.

Description

technical field [0001] The invention relates to a magnesium alloy and a manufacturing process thereof, in particular to a high-speed extrusion aging-free medium-high strength magnesium alloy and a manufacturing method thereof. Background technique [0002] Magnesium (Mg) is one of the most abundant elements on the earth. It is widely distributed in land, ocean and lakes. my country has proven magnesite reserves of 3.4 billion tons, ranking first in the world; magnesium-containing dolomite resource reserves It can be seen that my country has abundant reserves of magnesium resources and a good foundation for the application of magnesium alloys. [0003] According to the analysis and calculation of industry insiders, when the price ratio of Mg:Al is 1.3:1, magnesium alloy can compete with aluminum in the market. However, the plastic processing performance of magnesium alloy is poor, the yield rate is low, and the production efficiency is also low. Moreover, it is difficult to f...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C23/06C22C1/02C22C1/06
Inventor 赵言辉刘一驰张志杰冯永鹏冯德文
Owner 鹤壁恒镁新材料科技有限公司
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