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A kind of high conductivity mg-zn-sn-sc-xca magnesium alloy and its preparation method

A high-conductivity, magnesium alloy technology, applied in the field of light metal materials, can solve the problems of poor electrical conductivity and large gap, and achieve the effects of good room temperature mechanical properties, light weight, high tensile strength and yield strength

Active Publication Date: 2021-08-17
鹤壁镁途科技有限公司
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  • Description
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Problems solved by technology

As an important physical property of magnesium alloys, electrical conductivity has received some attention and research, but common binary magnesium alloys and ternary magnesium alloys Mg-Al-Zn, Mg-Al-Mn, Mg-Al-Si and The conductivity of Mg-Al-RE is not good, and there is a big gap with the actual application

Method used

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  • A kind of high conductivity mg-zn-sn-sc-xca magnesium alloy and its preparation method
  • A kind of high conductivity mg-zn-sn-sc-xca magnesium alloy and its preparation method
  • A kind of high conductivity mg-zn-sn-sc-xca magnesium alloy and its preparation method

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preparation example Construction

[0025]The present invention also provides a method for preparing a high-conductivity Mg-Zn-Sn-Sc-xCa magnesium alloy, which sequentially includes alloy smelting, homogenization treatment and hot extrusion, and the specific steps are as follows:

[0026] Step S1, alloy smelting: first, according to the mass percentage composition of the Mg-Zn-Sn-Sc-xCa magnesium alloy, calculate the ratio of alloy elements, weigh the alloy raw material magnesium ingot, magnesium-scandium master alloy, magnesium-calcium master alloy, tin and zinc;

[0027] Next, put the graphite crucible in the vacuum induction melting furnace, then put the stainless steel crucible loaded with the alloy raw material into the graphite crucible, vacuumize the vacuum induction melting furnace to make the vacuum less than 0.1Pa, into an inert protective gas, and start heating to the alloy melting temperature to fully melt the alloy raw material to obtain an alloy melt; finally, cool and extrude the stainless steel c...

Embodiment 1- Embodiment 13

[0033] Example 1-Example 13 The composition design of the Mg-Zn-Sn-Sc-xCa magnesium alloy is shown in Table 1.

[0034] Example 1-Example 13 The process parameters of the preparation method of Mg-Zn-Sn-Sc-xCa magnesium alloy are shown in Table 2.

[0035] Table 3 shows the compositional design and preparation method of comparative example 1-comparative example 10 magnesium alloys.

[0036] Table 1 Example 1-Example 13 Composition design of Mg-Zn-Sn-Sc-xCa magnesium alloy (wt%)

[0037] .

[0038] Table 2 Example 1-Example 13 Mg-Zn-Sn-Sc-xCa magnesium alloy preparation method process parameters

[0039] .

[0040] Table 3 Composition Design and Preparation Method of Comparative Example 1-Comparative Example 10 Magnesium Alloy (wt%)

[0041] .

[0042] The Mg-Zn-Sn-Sc-xCa magnesium alloy prepared above is evaluated as follows:

[0043] Conductivity test method: use the Sigmascope SMP10 conductivity tester produced by FISCHER in Germany to measure the relative conduct...

Embodiment 14- Embodiment 19

[0056] Table 5 Example 14-Example 19 Composition design of Mg-Zn-Sn-Sc-xCa magnesium alloy (wt%)

[0057] .

[0058] The Mg-Zn-Sn-Sc-xCa magnesium alloy designed in Example 14-Example 19 in Table 5 is prepared with reference to the preparation method of Example 1, and the metallographic appearance of the obtained as-cast Mg-Zn-Sn-Sc-xCa magnesium alloy is obvious. Microorganisms such as figure 1 shown. From figure 1 It can be seen that with the increase of Sn and Ca content in the Mg-Zn-Sn-Sc-xCa alloy, the metallographic structure of the alloy tends to be uniform, the grains become finer, and the grain refinement effect is obvious.

[0059] figure 2 SEM scanning electron microscope microstructure pictures of as-cast Mg-Zn-Sn-Sc-xCa magnesium alloy show that after adding Ca element, the structure is more uniform, the grains are obviously refined, and the electrical conductivity of Mg-Zn-Sn-Sc-xCa magnesium alloy The efficiency has been significantly improved; adding ...

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Abstract

The invention provides a high-conductivity Mg-Zn-Sn-Sn-Sc-xCa magnesium alloy and a preparation method thereof, belonging to the technical field of light metal materials. A high-conductivity Mg-Zn-Sn-Sc-xCa magnesium alloy, composed of: Zn: 1-6%, Sn: 1-5%, Sc: 0.05-0.5%, Ca: 0-3%, The rest is Mg and unavoidable impurities, and the total amount of unavoidable impurities is less than 0.05%. The composition ratio of Mg-Zn-Sn-Sc-xCa magnesium alloy of the present invention is scientific, synergistic, and has the characteristics of light weight, high strength, high toughness and high electrical conductivity, wherein solid solution state Mg-3Zn-3Sn-0.2Sc ‑0.6Ca and extruded Mg‑3Zn‑3Sn‑0.2Sc‑1.5Ca magnesium alloys have the highest electrical conductivity of about 31 MS / m.

Description

technical field [0001] The invention belongs to the technical field of light metal materials, and relates to a magnesium alloy, in particular to a high-conductivity Mg-Zn-Sn-Sc-xCa magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloys have been widely used in aerospace, national defense, and medical rehabilitation equipment in recent years due to their unique properties such as low density, high specific stiffness, high specific strength, good shock resistance, excellent electromagnetic shielding performance, and good recyclability. , transportation, architectural decoration, communication facilities, sports equipment and office supplies and other fields. The content of magnesium in the earth's crust and seawater is very rich. Since the Pidgeon method magnesium smelting technology was popularized and applied in my country at the beginning of this century, the output of primary magnesium has increased rapidly, but at present more tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22C23/00C22C1/02C22F1/06H01B1/02
CPCC22C1/02C22C23/00C22C23/04C22F1/06H01B1/02
Inventor 马春华卢志文冷玉敏仲志国叶铁李根全赵亚忠许东光
Owner 鹤壁镁途科技有限公司
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