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High electromagnetic shielding effectiveness magnesium alloy and preparation method thereof

An electromagnetic shielding and magnesium alloy technology, applied in the field of high electromagnetic shielding efficiency magnesium alloy and its preparation, magnesium alloy, to achieve the effect of short process, high electromagnetic shielding performance and low cost

Active Publication Date: 2018-06-15
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the research on electromagnetic shielding of magnesium alloys is still in the basic stage, and there is room for further improvement of the electromagnetic shielding performance of magnesium alloys, and the alloys can obtain excellent mechanical properties on the basis of certain electromagnetic shielding performance to meet the needs of a wider range of applications. The actual needs of the project

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  • High electromagnetic shielding effectiveness magnesium alloy and preparation method thereof
  • High electromagnetic shielding effectiveness magnesium alloy and preparation method thereof

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Effect test

Embodiment 1

[0023] Embodiment 1: the heat-resistant rare earth magnesium alloy of the present embodiment is made up of the following components by weight percentage: 3% Sn, 1% Zn, 0.2% Ca, 0.3% Ce, all the other are Mg and unavoidable impurity, impurity total The amount is less than 0.12wt.%.

[0024] (1) Alloy smelting and casting: the raw materials used are industrial pure magnesium ingots, pure zinc particles, pure tin particles, Mg-30% Ca master alloy, Mg-40% Ce master alloy; cast by semi-continuous casting method. in SF 6 +CO 2 Under the protection of gas, put the magnesium ingot into the crucible and heat it up to 730°C to remove slag after melting. Add pure zinc particles, pure tin particles, Mg-30% Ca master alloy and Mg-40% Ce according to the proportion of the above alloy components. Master alloy; adding method: preheat pure zinc particles, pure tin particles, Mg-30% Ca master alloy and Mg-40% Ce master alloy at 150°C for 30 minutes, and press them below the liquid surface qui...

Embodiment 2

[0029]Embodiment 2: the heat-resistant rare earth magnesium alloy of the present embodiment is made up of the following components by weight percentage: 3% Sn, 2% Zn, 0.2% Ca, 0.3% Ce, the rest is Mg and unavoidable impurity, impurity total The amount is less than 0.12wt.%. The method of alloy smelting and casting-homogenization-machining-hot rolling-solution aging to obtain the magnesium alloy of this example is the same as that of Example 1, except that the composition ratio of the smelted alloy is different.

Embodiment 3

[0030] Embodiment 3: the heat-resistant rare earth magnesium alloy of the present embodiment is made up of the following components by weight percentage: 3% Sn, 3% Zn, 0.2% Ca, 0.3% Ce, all the other are Mg and unavoidable impurity, impurity total The amount is less than 0.12wt.%. The method of alloy smelting and casting-homogenization-machining-hot rolling-solution aging to obtain the magnesium alloy of this example is the same as that of Example 1, except that the composition ratio of the smelted alloy is different.

[0031] Table 1 Magnesium alloy material electromagnetic shielding performance of the present invention

[0032]

[0033] The room temperature mechanical property of table 2 magnesium alloy material of the present invention

[0034]

[0035] The electromagnetic shielding performance of the magnesium alloy material of the present invention at 1200MHz is listed in Table 1. Compared with the ZK60 alloy, the SE value of the magnesium alloy of the present inve...

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Abstract

The invention provides a high electromagnetic shielding effectiveness magnesium alloy and a preparation method thereof. Components of the alloy comprise, by weight percentage, 1-5 wt.% of Zn, 1-5 wt.%of Sn, 0.1-0.5 wt.% of Ca, 0.1-0.5 wt.% of Ce and the balance Mg and inevitable impurities. By adding alloy elements (Mg, Zn, Sn, Ca and Ce) in the magnesium alloy to be matched to hot rolling and hot treatment, the high electromagnetic shielding effectiveness magnesium alloy is achieved. The method includes the specific process steps of smelting, homogenizing, hot rolling and solid solution aging. Adding of a small amount of calcium and cerium alloy elements, forming and precipitating of a second phase are promoted, and the conductivity and the shielding performance of the alloy are improved; meanwhile, due to precipitating of the high-density second phase, electromagnetic waves can also be effectively reflected; besides, in combination of refined crystal strengthening, precipitating strengthening and the like, the alloy has high strength while good electromagnetic shielding performance is achieved. Process equipment related to the high electromagnetic shielding effectiveness magnesium alloy and the preparation method thereof is universal equipment, cost is low, operation is easy, and industrial achievement is easy.

Description

technical field [0001] The invention relates to a magnesium alloy, in particular to a magnesium alloy with high electromagnetic shielding efficiency containing zinc, tin, calcium and cerium and a preparation method thereof, belonging to the field of shielding materials and metal materials. Background technique [0002] With the rapid development of modern science and technology, more and more electronic and electrical equipment have been put into use, which has brought great convenience to human production and life. At the same time, the incidental electromagnetic waves of various frequencies and energies flood our living space, forming a new type of pollution after water pollution, air pollution, and noise pollution, that is, electromagnetic radiation pollution. People usually use electromagnetic shielding method to deal with electromagnetic pollution. However, realizing electromagnetic shielding is a very complex system engineering, and shielding materials play a pivotal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22F1/002C22F1/06
Inventor 陈先华郜商羽潘复生宋锴
Owner CHONGQING UNIV
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