Cast magnesium alloy of low linear shrinkage

A technology for casting magnesium alloys and linear shrinkage, which is applied in the field of magnesium alloys, can solve problems affecting the qualified rate of magnesium alloy parts, limit the use range, and affect the application of casting magnesium alloys, and achieve small changes in liquid volume and solid volume, and fluidity And the effect of good die-casting and filling ability

A technology for casting magnesium alloys and linear shrinkage, which is applied in the field of magnesium alloys, can solve problems affecting the qualified rate of magnesium alloy parts, limit the use range, and affect the application of casting magnesium alloys, and achieve small changes in liquid volume and solid volume, and fluidity And the effect of good die-casting and filling ability

CN102618758AInactive Publication Date: 2012-08-01嘉兴佳斯贝特新材料有限公司
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  • Cast magnesium alloy of low linear shrinkage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The magnesium alloy is prepared according to the steps described in the above process one, and the casting adopts metal mold casting, and the weight percentage of the magnesium alloy is composed of Al 1.5%, Zn 0.1%, Mn 0.1%, Y 0.0002%, Nb 0.0002%, Li 0.0002%, Zr 0.0002%, the rest is Mg.

[0029] Castings are heat treated.

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

Embodiment 2

[0032] Prepare the magnesium alloy according to the steps described in the above process two, the casting adopts semi-solid casting, and the weight percentage of the magnesium alloy is composed of Al 25%, Zn 3.5%, Mn 2.2%, Sc 16%, Nb 4%, Li 9%, Ti 2%, the rest is Mg.

[0033] Castings are heat treated. See Table 1 for the properties of the magnesium alloy castings provided in this example.

Embodiment 3

[0035]The magnesium alloy is prepared according to the steps described in the above-mentioned process 1. The casting adopts high-pressure die-casting, and the weight percentage of the magnesium alloy is composed of Al1.5%, Zn 0.3%, Mn 0.1%, Sm 0.1%, Nb 0.05%, Li 0.001%, Sr 0.001 %, the rest is Mg.

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

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Abstract

The invention discloses a cast magnesium alloy of low linear shrinkage, which belongs to the field of magnesium alloys. The magnesium alloy consists of Mg, Al, Zn, Mn, rare earth, Nb, Li and M element, wherein the materials have the following weight percentage composition: 1.5-25 percent of Al, 0.1-3.5 percent of Zn, 0.1-2.2 percent of Mn, 0.0002-16 percent of rare earth, 0.0002-4 percent of Nb, 0.0002-9 percent of Li, 0.0002-2 percent of M element and the balance Mg; and the M element is at least one of Zr, Ti, Sr, Ca, C and B. According to the heat-resistant magnesium alloy, the rare earth element and the Nb element are added into the magnesium alloy, so that the structure of beta phase is changed; the Zr element and the M element are added to refine crystal grains; due to combined action of the elements, latent heat of crystallization during alloy solidification is changed; and the magnesium alloy which has superior mold-filling capacity, low shrinkage, superior mechanical property and good machinability, fluidity and die-cast performance and is suitable for casting is obtained.

Description

technical field [0001] The invention relates to a magnesium alloy, in particular to a high-performance magnesium alloy suitable for casting, especially for high-pressure die-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 MgAlZn series die-casting magnesium alloys are YM302, YM303, YM304, YM305; the grades of MgAlZn series die-casting magnesium alloys of the American standard ASTM B are AZ91A, AZ91B, AZ91D; the grades of MgAlZn series die-casting magnesium alloys of the Japanese standard JIS H are MDC1B, MDC1D; Eu...

Claims

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Application Information

Patent Timeline
01 Aug 2012
Publication
CN102618758A
IPC
C22C23/00; C22C23/02; C22C23/04; C22C23/06
Inventors
冯俊