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Mg-Al-Zn-Ce alloy for die casting and preparation method thereof

A mg-al-zn, al-ce technology, applied in the field of die-casting Mg-Al-Zn-Ce alloy and its preparation, can solve the problems of poor corrosion resistance, coarse structure and grain, low mechanical properties, etc., and achieve corrosion rate The effect of reducing, improving corrosion resistance, and good overall performance

Active Publication Date: 2018-08-14
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the disadvantages of current Mg-Al-Zn magnesium alloys, such as relatively coarse microstructure grains, low mechanical properties and poor corrosion resistance, and provides a Mg-Al-Zn-Ce alloy for die-casting and a preparation method thereof

Method used

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  • Mg-Al-Zn-Ce alloy for die casting and preparation method thereof
  • Mg-Al-Zn-Ce alloy for die casting and preparation method thereof
  • Mg-Al-Zn-Ce alloy for die casting and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] A Mg-Al-Zn-Ce alloy, the chemical composition of which is: Al: 8.8%, Zn: 0.8%, Ce: 0.18%, and the balance is Mg;

[0037] The chemical composition of the Al-Ce master alloy is: 9.8% Ce, the balance is Al and unavoidable impurities in terms of mass percentage.

[0038] A kind of preparation method of Mg-Al-Zn-Ce alloy, concrete steps are as follows:

[0039] Step 1, prepare Al-Ce master alloy:

[0040] (1) According to the chemical composition ratio of the Al-Ce master alloy, put pure aluminum in a crucible and heat it to melt, and keep it warm for 15 minutes;

[0041] (2) Put the dried rare earth Ce into the melted aluminum and keep it warm for 15 minutes to obtain the alloy melt A.

[0042] (3) Stir the alloy melt A with a graphite rod, remove the slag and let it stand for 15 minutes, take out the crucible, and cast the alloy melt A into a prepared mold to obtain an Al-Ce master alloy with uniform composition;

[0043] Step 2, prepare Mg-Al-Zn alloy:

[0044] (1) U...

Embodiment 2

[0052]A Mg-Al-Zn-Ce alloy, the chemical composition of which is: Al: 9.0%, Zn: 0.8%, Ce: 0.20%, and the balance is Mg;

[0053] The chemical composition of the Al-Ce master alloy is: 10.0% Ce, the balance being Al and unavoidable impurities in terms of mass percentage.

[0054] A kind of preparation method of Mg-Al-Zn-Ce alloy, concrete steps are as follows:

[0055] Step 1, prepare Al-Ce master alloy:

[0056] (1) According to the chemical composition ratio of the Al-Ce master alloy, put pure aluminum in a crucible and heat it to melt, and keep it warm for 10 minutes;

[0057] (2) Put dried rare earth Ce into the melted aluminum and keep it warm for 10 minutes to obtain alloy melt A.

[0058] (3) Stir the alloy melt A with a graphite rod, remove the slag and let it stand for 10 minutes, take out the crucible, and cast the alloy melt A into a prepared mold to obtain an Al-Ce master alloy with uniform composition;

[0059] Step 2, melting Mg-Al-Zn alloy:

[0060] (1) Using ...

Embodiment 3

[0068] A Mg-Al-Zn-Ce alloy, the chemical composition of which is: Al: 9.2%, Zn: 0.8%, Ce: 0.22%, and the balance is Mg;

[0069] The chemical composition of the Al-Ce master alloy is as follows: 10.2% Ce, the balance being Al and unavoidable impurities.

[0070] A kind of preparation method of Mg-Al-Zn-Ce alloy, concrete steps are as follows:

[0071] Step 1, prepare Al-Ce master alloy:

[0072] (1) According to the chemical composition ratio of the Al-Ce master alloy, put pure aluminum in a crucible and heat it to melt, and keep it warm for 20 minutes;

[0073] (2) Put dried rare earth Ce into the melted aluminum and keep it warm for 10 minutes to obtain alloy melt A.

[0074] (3) Stir the alloy melt A with a graphite rod, remove the slag and let it stand for 10 minutes, take out the crucible, and cast the alloy melt A into a prepared mold to obtain an Al-Ce master alloy with uniform composition;

[0075] Step 2, melting Mg-Al-Zn alloy:

[0076] (1) Using 8.95% Al by mass...

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Abstract

The invention discloses a Mg-Al-Zn-Ce alloy for die casting and a preparation method thereof, and belongs to the technical field of magnesium alloy preparation. The Mg-Al-Zn-Ce alloy is composed of anAl-Ce intermediate alloy and a Mg-Al-Zn alloy, the Mg-Al-Zn-Ce alloy comprises the following chemical components of, by mass, 8.8-9.2% of Al, 0.78-0.82% of Zn, 0.18-0.22% of Ce, and the balance Mg; and the preparation method thereof comprises the following steps of firstly preparing the Al-Ce intermediate alloy, then smelting the Mg-Al-Zn alloy, and finally, smelting the Al-Ce intermediate alloyand the Mg-Al-Zn alloy to obtain the Mg-Al-Zn-Ce alloy. According to the Mg-Al-Zn-Ce alloy for die casting and the preparation method thereof, the grain boundary network Mg17Al12 compound is refined,the mechanical property of the magnesium alloy is improved, in particular, the plasticity of the magnesium alloy is improved, the high specific strength and the specific rigidity of the magnesium alloy are ensured, and meanwhile, the corrosion resistance of the magnesium alloy is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy preparation, and in particular relates to a Mg-Al-Zn-Ce alloy for die casting and a preparation method thereof. technical background [0002] Magnesium alloy is the lightest metal structural material in practical application so far. It has the advantages of low density, high specific strength and specific stiffness. It can achieve significant energy saving and emission reduction effects when applied to structural materials. Lightweight magnesium alloy structural materials are widely used It is an important means to deal with the global energy crisis and environmental pollution [0003] Magnesium alloys have attracted much attention as a lightweight structural material in the automotive industry, among which the AZ series casting alloys (Mg-Al-Zn alloys) in the Mg-Al system are the most widely used. However, Mg-Al-Zn alloys have many inherent disadvantages. First, the solidification temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/03
CPCC22C1/03C22C23/02
Inventor 铁镝季兆山管仁国张博彧任浩博蔡志辉
Owner NORTHEASTERN UNIV