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Low-cost magnesium alloy with high thermal conductivity and electromagnetic shielding performance, and preparation and processing method thereof

A technology of electromagnetic shielding and processing method, applied in metal rolling and other directions, can solve the problems of high alloy manufacturing cost and decreased thermal conductivity, and achieve the effects of good formability, improved formability and low cost

Active Publication Date: 2020-04-17
GRIMAT ENG INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Studies have shown that the addition of rare earth elements can improve the mechanical properties of magnesium alloys, but it will also lead to a significant decrease in its thermal conductivity, and the alloy manufacturing cost is relatively high

Method used

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  • Low-cost magnesium alloy with high thermal conductivity and electromagnetic shielding performance, and preparation and processing method thereof

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preparation example Construction

[0030] The preparation method of the above-mentioned low-cost magnesium alloy with high thermal conductivity and electromagnetic shielding performance includes the following steps:

[0031] (1) Dosing according to the above composition requirements, wherein Zn, Sn, Cu, and Co elements are added in the form of pure metal, and the remaining Mg is added in the form of pure Mg ingot. Preheat the weighed raw materials at 200° C. for 24 h in a blast drying oven to make the raw materials in a dry state.

[0032] (2) Put the dried pure magnesium ingot (about 60% of the total mass) into a stainless steel crucible, then put the crucible into a preheated (preheating temperature 500-650°C) medium frequency electromagnetic induction furnace, and heat up to 720~740℃, keep warm for 6-10min, so that the magnesium ingots are completely melted under the protective gas (argon:tetrafluoroethane=20:1); add the remaining magnesium ingots in batches under the condition that the melt does not overflo...

Embodiment 1

[0038] Embodiment 1: the selected alloy is Mg-Zn-Sn-Cu series magnesium alloy, by mass percentage, Zn content is 3%, Sn content is 3%, Cu content is 0.5%, Co content is 0.2%, all the other are Mg And unavoidable impurities, impurity Fe content <0.006%. The preparation of the alloy is carried out according to the following steps:

[0039] (1) Dosing according to the composition requirements of the alloy: Zn, Sn, Cu, and Co elements are added in the form of pure metals, and Mg is added in the form of pure magnesium ingots. Put pure magnesium ingots and various pure metal blocks into the blast drying oven, preheat at 200°C for 24 hours, remove the moisture in the raw materials, and prepare for the next smelting;

[0040] (2) First raise the temperature of the medium-frequency electromagnetic induction furnace used for heating to 520 ° C, and pass a protective gas into the heating furnace. The composition of the protective gas is a mixed gas of argon and tetrafluoroethane (ratio ...

Embodiment 2

[0045] Embodiment 2: the selected alloy is Mg-Zn-Sn-Cu series magnesium alloy, by mass percentage, the Zn content is 6%, the Sn content is 3%, the Cu content is 0.5%, the Co content is 0.5%, and the rest is Mg And unavoidable impurities, impurity Fe content <0.006%. The preparation of the alloy is carried out according to the following steps:

[0046] (1) Dosing according to the composition requirements of the alloy: Zn, Sn, Cu, and Co elements are added in the form of pure metals, and Mg is added in the form of pure magnesium ingots. Put pure magnesium ingots and various pure metal blocks into the blast drying oven, preheat at 200°C for 24 hours, remove the moisture in the raw materials, and prepare for the next smelting;

[0047] (2) First raise the temperature of the medium-frequency electromagnetic induction heating furnace used for heating to 520 ° C, and pass a protective gas into the heating furnace. The composition of the protective gas is a mixed gas of argon and tet...

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Abstract

The invention relates to a low-cost magnesium alloy with high thermal conductivity and electromagnetic shielding performance, and a preparation and processing method thereof, which belong to the fieldof metal materials for electromagnetic shielding. The magnesium alloy comprises the following components in percentage by mass: totaling 6-12% of Zn and Sn (wherein Zn content is 3-7% and Sn contentis 1-5%), 0.5-2% of Cu, 0.2-1.0% of Co and the balance Mg and inevitable impurities Fe, wherein the impurity Fe content is smaller than or equal to 0.006%. Through the processes of cast ingot smelting, homogenization, extrusion or rolling deformation, heat treatment and the like, the low-cost magnesium alloy with high thermal conductivity and electromagnetic shielding performance is obtained, andthe alloy has good forming performance and mechanical performance at the same time and can provide more choices for light electromagnetic shielding materials.

Description

technical field [0001] The invention relates to a low-cost magnesium alloy with high thermal conductivity and electromagnetic shielding performance and a preparation and processing method thereof, belonging to the category of metal materials for electromagnetic shielding. Background technique [0002] With the development of modern society, all kinds of electronic devices emerge in an endless stream. They facilitate our production and life, but they also bring problems of electromagnetic interference and pollution. Electromagnetic waves generated by electronic equipment can interfere with the human nervous system and affect human health. There are complex electronic systems on aircraft, ships, and spacecraft, and the stable operation of equipment needs to eliminate external electromagnetic interference. Therefore, the problem of electromagnetic shielding has attracted people's attention day by day, and electromagnetic shielding materials have become a research hotspot in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C23/00C22C1/02C22F1/06B21C23/00B21B3/00
CPCB21B3/00B21C23/002C22C1/02C22C23/00C22C23/04C22F1/06
Inventor 马鸣龙张奎李永军袁家伟李兴刚石国梁刘艳辉
Owner GRIMAT ENG INST CO LTD
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