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Metal refiner for magnesium alloy and preparation method thereof

A refiner and magnesium alloy technology, applied in the field of metal material processing, can solve the problems of large size of magnesium strontium compound, poor refining effect of magnesium alloy, unstable strontium content, etc., to achieve no environmental pollution, low production cost, fine Strong chemical effect

Inactive Publication Date: 2008-07-30
CHANGSHU NANJING NORMAL UNIV DEV RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The strontium content in the Mg-Sr alloy produced by this method is unstable, which leads to the unstable quantity of the magnesium-strontium compound used for nucleation in the Mg-Sr alloy, and the size of the magnesium-strontium compound formed in addition is large and uneven, so The refining effect of magnesium alloy is poor

Method used

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  • Metal refiner for magnesium alloy and preparation method thereof

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Embodiment 1

[0009] A metal refiner for magnesium alloys, the refiner is based on magnesium, contains strontium, neodymium and lanthanum, the mass percentage of alloy elements is: Sr 5%, Nd 0.3%, La 0.3%, and the rest is magnesium 94.4% , the 0.1μm submicron magnesium-strontium compound phase is distributed on the alloy matrix.

Embodiment 2

[0011] A metal refiner for magnesium alloys, the refiner is based on magnesium, contains strontium, neodymium and lanthanum, the mass percentage of alloy elements is: Sr 30%, Nd 0.6%, La 0.6%, and the rest is magnesium 68.8% , the submicron magnesium-strontium compound phase of 0.8 μm is distributed on the alloy matrix.

Embodiment 3

[0013] A metal refiner for magnesium alloys, the refiner is based on magnesium, contains strontium, neodymium and lanthanum, the mass percentage of alloy elements is: Sr20%, Nd0.5%, La0.5%, the rest is magnesium79%, Submicron magnesium-strontium compound phases of 0.5 μm are distributed on the alloy matrix.

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Abstract

The invention relates to a metal refiner for a magnesium alloy and is characterized in that the refiner adopts magnesium as the basal body and contains strontium, neodymium and lanthanum elements. The mass percentage for the alloy elements is as follows: Sr more than or equal to 5 percent and less than or equal to 30 percent, Nd more than or equal to 0.3 percent and less than or equal to 0.6 percent, La more than or equal to 0.3 percent and less than or equal to 0.6 percent and the rest is magnesium. The submicron phases of the magnesium strontium compound with a length of 0.1 to 0.8 micrometer are distributed on the basal body of the alloy. The refiner preparing method of the invention has simple technique, stable elements, no environmental pollution and low manufacturing cost. The refiner obtained from the method has an excellent service effect, which has a refining effect is 3 to 5 times of that of a common refiner under the same adding condition.

Description

1. Technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a metal refiner for magnesium alloys and a preparation method thereof, specifically a metal refiner for magnesium alloys containing a submicron magnesium-strontium compound phase and a preparation method thereof. 2. Background technology [0002] Existing technology: At present, due to the light weight of magnesium alloy, it has higher specific strength and specific stiffness than other alloys. However, the tensile strength of magnesium alloys does not have an absolute advantage compared with other alloys, and one of the most effective ways to improve the strength and toughness of magnesium alloys is to refine the grains of magnesium alloys by using a refiner, such as using Sr-containing metals. Refining agent to refine the grains of magnesium alloys. The role of Sr is to form magnesium-strontium compounds, which serve as the basis for the nuclea...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/06
Inventor 王玲赵浩峰姚以俊谢爱根李庆芳雷勇赵学余
Owner CHANGSHU NANJING NORMAL UNIV DEV RES INST
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