A kind of high-strength magnesium-aluminum-manganese-strontium alloy and its preparation method

A high-strength, alloy technology, which is applied in the field of high-strength magnesium-aluminum-manganese-strontium magnesium alloys and their preparation, can solve the problems of expensive Zr elements, which cannot meet industrial applications, and limit widespread use, and achieve low prices, Low cost, effect of suppressing grain growth

Active Publication Date: 2015-12-23
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The strength of Mg-Zn-Zr alloys can reach a higher value, such as the tensile strength of ZK60 alloy can reach 340MPa, but the Zr element is expensive, which limits the wide use of this alloy
Zr-free Mg-Al-Zn and Mg-Mn alloys, such as AZ31 and MB8 alloys, are cheap, but their strength is not high, and they cannot meet the requirements of industrial applications.

Method used

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  • A kind of high-strength magnesium-aluminum-manganese-strontium alloy and its preparation method
  • A kind of high-strength magnesium-aluminum-manganese-strontium alloy and its preparation method
  • A kind of high-strength magnesium-aluminum-manganese-strontium alloy and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The method for preparing high-strength magnesium-aluminum-manganese-strontium alloy in this embodiment comprises the following steps:

[0042] 1) smelting: at first select raw material according to the formula of table 1 embodiment 1, wherein raw material is industrial pure magnesium ingot, industrial pure aluminum, Mg-5%Mn master alloy and Mg-5%Sr master alloy; Then raw material is put into filling Melt in a vacuum induction furnace with argon, stir for 2-5 minutes after all melted to make the ingredients uniform; finally close the induction furnace, take out the crucible and cool it with water cooling.

[0043] 2) Machining: turning to remove the oxide layer on the surface of the alloy obtained in step 1), and making the size of the processed magnesium alloy suitable for extrusion processing;

[0044] 3) Homogenization treatment: heat the alloy obtained in step 2) to 420°C with the furnace, and keep at this temperature for 10 hours for homogenization annealing;

[00...

Embodiment 2

[0047] The difference between this example and Example 1 is that this example selects raw materials according to the formula of Example 2 in Table 1.

Embodiment 3

[0049] The difference between this example and Example 1 is that this example selects raw materials according to the formula of Example 3 in Table 1.

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Abstract

The invention discloses high-strength magnesium-aluminum-manganese-strontium alloy. The alloy is prepared from the following ingredients in percentage by mass: 1.0-5.0% of Al, 0.1-1.5% of Mn, 0.1-5% of Sr, not higher than 0.15% of unavoidable impurities and the balance of magnesium. The invention further discloses a method for preparing the high-strength magnesium-aluminum-manganese-strontium alloy. The method comprises the following steps of: (1) selecting raw materials according to the formula, and smelting in a vacuum induction furnace so as to form alloy; (2) removing an oxide layer from the surface of the alloy obtained in the step (1); (3) carrying out annealing on the alloy obtained in the step (2); and (4) carrying out extrusion processing on the alloy obtained in the step (3). According to the alloy disclosed by the invention, due to the strontium element, the degree of super-cooling of the alloy is increased, the crystal grains are refined, strontium is enriched at a growth interface during solidification, and the growth rate of the crystal grains is reduced; and furthermore, an Al4Sr phase is formed by strontium and aluminum, so that the recrystallization growth of the crystal grains can be inhibited. The alloy disclosed by the invention is low in cost, and the preparation method is simple.

Description

technical field [0001] The invention relates to a magnesium alloy and a preparation method thereof, in particular to a high-strength magnesium-aluminum-manganese-strontium series magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is the lightest commercial metal structure material. The density of commonly used magnesium alloy is about 2 / 3 of that of aluminum alloy and 1 / 4 of that of steel. Compared with other metal structural materials, magnesium alloy has the advantages of higher specific strength and specific stiffness, strong shock absorption, electromagnetic shielding and radiation resistance, easy cutting and processing, and easy recycling. It is widely used in automobiles, electronics, electrical appliances, transportation, aviation Aerospace and other fields have important application value and broad application prospects. They are the third type of metal structural materials developed after steel and aluminum alloys, and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C23/02C22F1/06
Inventor 张丁非潘复生谌夏郭和平余大亮胡光山郭飞蒋璐瑶柴森森董井忍
Owner CHONGQING UNIV
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