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Heatproof casting magnesium alloy

A technology for casting magnesium alloys and magnesium alloys, which is applied in the field of MgAlMn series heat-resistant casting magnesium alloys, can solve the problems of low temperature resistance, uncomfortable parts, high working temperature, etc., and achieve high temperature resistance, good machinability, and excellent mechanical properties Effect

Inactive Publication Date: 2013-03-27
余姚市海帮五金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventor has found that the prior art has at least the following problems: some parts on the automobile, such as: gearbox case, engine case cover, etc., have higher operating temperature, and there are also lightweight parts. need
But the above-mentioned MgAlMn series magnesium alloy is due to the β phase in the alloy structure as Mg 17 Al 12 Mainly, Mg 17 Al 12 The melting point is low, and it is not resistant to high temperature. The tensile strength of the above-mentioned MgAlMn series magnesium alloy is only tens of MPa at a high temperature of 200 ° C. high temperature demand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The heat-resistant magnesium alloy is prepared according to the steps described in the above-mentioned process 1. The casting adopts high-pressure die-casting. The weight percentage of the magnesium alloy is composed of Al 6.2%, Mn 0.4%, Gd 0.5%, Nb 0.2%, and the rest is Mg.

[0032] See Table 1 for the properties of the magnesium alloy castings provided in this example.

Embodiment 2

[0034] The heat-resistant magnesium alloy is prepared according to the steps described in the second process above, and the casting is cast in a metal mold. The weight percentage of the magnesium alloy is composed of Al 1.5%, Mn 0.13%, Sm 0.001%, Nb 0.001%, and the rest is Mg.

[0035] Heat treatment of castings (T4 solid solution treatment process): raise the temperature of castings to 480°C in a box-type resistance furnace, keep it warm for 1 hour, and water quench the castings after they come out of the furnace, the water temperature is 80°C.

[0036] See Table 1 for the properties of the magnesium alloy castings provided in this example.

Embodiment 3

[0038]The heat-resistant magnesium alloy is prepared according to the steps described in the second process above, and the casting is semi-solid casting. The weight percentage of the magnesium alloy is composed of Al 25%, Mn 2%, Y 16%, Nb 4%, and the rest is Mg.

[0039] Heat treatment of castings (T4 solid solution treatment process): the castings are heated to 480°C in a box-type resistance furnace and kept for 8 hours. After the castings are released from the furnace, they are water-quenched and the water temperature is 80°C.

[0040] 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 casting magnesium alloy, which belongs to the magnesium alloy field. The magnesium alloy is composed of Mg, Al, Mn, rare earth and Nb, and comprises the following components by weight: 1.5-25% of Al, 0.13-2% of Mn, 0.001-16% of rare earth, 0.001-4% of Nb and the balance of Mg. The rare earth and an Nb element are added in the magnesium alloy, and a structure of a beta phase is changed; thereby the high temperature resistance performance of the casting magnesium alloy is enhanced, the heatproof casting magnesium alloy has excellent mechanical property and machinery processability, and good fluidity and die casting performance.

Description

technical field [0001] The invention relates to a magnesium alloy, in particular to a MgAlMn series heat-resistant casting magnesium alloy. 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 MgAlMn series die-casting magnesium alloys are YM202, YM203, YM204, YM205; the grades of MgAlMn series die-casting magnesium alloys of the American standard ASTM B are AM50A, AM60A, AM60B; the grades of MgAlMn series of die-casting magnesium alloys of the Japanese standard JIS H are MDC2B, MDC4, MDC5; European standard EN MgAlMn die-casti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02
Inventor 冯俊
Owner 余姚市海帮五金科技有限公司
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