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Heatproof magnesium alloy

A magnesium alloy, heat-resistant technology, applied in the field of magnesium alloys, can solve problems such as the inability of magnesium alloys to meet the requirements, achieve excellent mechanical properties, delay the growth of grains, and have good fluidity and die casting.

Inactive Publication Date: 2013-03-27
孙俊亚 +8
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventors have found that the prior art has at least the following problems: with the development of science and technology, the application fields of magnesium alloys are becoming more and more extensive, and the existing magnesium alloys can no longer meet the requirements of working in high temperature environments above 200 °C. Therefore, there is an urgent need for a magnesium alloy with better high temperature resistance

Method used

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Embodiment 1

[0029] The heat-resistant magnesium alloy is prepared according to the steps described in the above-mentioned process two, and the casting is cast in a metal mold, and the weight percentage of the magnesium alloy is composed of Zn 0.2%, Zr 0.1%, Y 0.0002%, Nb 0.0002%, Al 0.001%, Sr 0.001 %, the rest is Mg.

[0030] Castings are heat treated. See Table 1 for the properties of the magnesium alloy castings provided in this example.

Embodiment 2

[0032] Prepare the heat-resistant magnesium alloy according to the steps described in the above-mentioned process one, and the casting adopts semi-solid casting, and the weight percentage of the magnesium alloy is composed of Zn 1%, Zr 1.5%, Sc 10%, Nb 2%, Al 1.2%, Ti 0.15 %, the rest is Mg.

[0033] Castings are heat treated.

[0034] See Table 1 for the properties of the magnesium alloy castings provided in this example.

Embodiment 3

[0036]Prepare the heat-resistant magnesium alloy according to the steps described in the above-mentioned process two, the casting adopts high-pressure die-casting, and the weight percentage of the heat-resistant magnesium alloy is composed of Zn 9%, Zr 2%, Sm 16%, Nb 4%, Al 1.49%, and Ca 2%. , and the rest are Mg.

[0037] See Table 1 for the properties of the magnesium alloy castings provided in this example.

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Abstract

The invention discloses a heatproof magnesium alloy, which belongs to the magnesium alloy field. The magnesium alloy is composed of Mg, Zn, Zr, rare earth, Nb, Al and M, and comprises the following components by weight: 0.2-9% of Zn, 0.1-2% of Zr, 0.0002-16% of rare earth, 0.0002-4% of Nb, 0.001-1.49% of Al, 0.001-2% of M and the balance of Mg. The M element is at least one selected in Ti, Sr, Ca, C and B. The rare earth and an Nb element are added in the magnesium alloy, and a structure of a beta phase is changed; the combined action of Zr and the M element can strongly refine the crystal grain, and Zr and M are reacted with certain impurity element (such as Si) in an alloy liquid and deposited, and the alloy liquid is purified. The combined effect of the elements enhances the high temperature resistance performance of the magnesium alloy, the heatproof magnesium alloy has excellent mechanical property and machinery processability, and good fluidity and die casting performance, and is suitable for casting the heatproof magnesium alloy and die casting of the heatproof magnesium alloy.

Description

technical field [0001] The invention relates to a magnesium alloy, in particular to a high-performance heat-resistant magnesium alloy suitable for casting. Background technique [0002] With the development of science and technology, vehicles represented by automobiles need to further develop new products with higher fuel efficiency by reducing the weight of the body. In the automobile manufacturing industry, magnesium alloy, as a new type of lightweight metal material, is used by automobile manufacturers to replace traditional cast iron in order to achieve the purpose of reducing the weight of the vehicle body. [0003] At present, the grades of domestic cast magnesium alloys include ZM2, ZM3, ZM4, ZM6 and so on. These grades of alloys have the characteristics of good mechanical properties and casting properties. At the same time, because the β phase of ZM series magnesium alloys contains a certain amount of MgZr compounds with higher melting points or the combination of M...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/02C22C23/04C22C23/06
Inventor 冯俊
Owner 孙俊亚
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