Low-cost high-strength-tenacity wrought magnesium alloy and preparation method thereof

A technology for magnesium alloys and formed parts, which is applied in the field of low-cost, high-strength and toughness deformed magnesium alloys and their preparation, can solve the problems such as the inability to give full play to the lightweight advantages of magnesium alloys, the inability to meet large-scale industrial production, and the increase in the cost of magnesium alloys. The effect of improving yield and utilization efficiency, more product types, and improving strengthening effect

Active Publication Date: 2018-09-21
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned high-strength magnesium alloys all use a relatively high content of rare earth elements. Rare earth elements not only have high cost, which will lead to a substantial increase in the cost of magnesium alloys, but also have a large specific gravity, which cannot give full play to the lightweight advantages of magnesium alloys and cannot meet the requirements of large-scale production. Requirements for large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The mass percentage of magnesium alloy components is: Zn: 6.1%, Y: 1.0%, Nd: 0.5%, La: 0.4%, Mn: 0.5%, the balance is Mg, and the mass percentages of Y, Nd and La in the component composition The sum is 1.9% of the total mass fraction.

[0021] making process:

[0022] (1) Add the preheated pure Mg and pure Zn into a low-carbon steel crucible, and protect it with 2# solvent. After the pure Mg and pure Zn are completely melted, add manganese chloride at the solution temperature of 757°C, and wait for the temperature to rise. Add Mg-30La, Mg-30Nd and Mg-30Y master alloys respectively when the temperature reaches 792°C. After complete melting, blow Ar gas for 16 minutes for purification treatment. During this process, add 6# solvent for stirring, and then let stand for 10 minutes Finally, the composition sampling in front of the furnace is carried out. If the composition is qualified, the crucible is closed and left standing, and the solution is set to keep warm at 676 ° ...

Embodiment 2

[0029] The mass percentage of magnesium alloy components is: Zn: 6.4%, Y: 0.9%, Nd: 0.6%, La: 0.6%, Mn: 0.6%, the balance is Mg, the sum of the mass percentages of Y, Nd and La in the composition 2.1% of the total mass fraction.

[0030] making process:

[0031] (1) Add the preheated pure Mg and pure Zn into a low-carbon steel crucible, and protect it with 2# solvent. After the pure Mg and pure Zn are completely melted, add manganese chloride at a solution temperature of 750°C, and wait for the temperature to rise. Add Mg-30La, Mg-30Nd and Mg-30Y master alloys respectively when the temperature reaches 780°C. After complete melting, blow Ar gas for 25 minutes for purification treatment. During this process, add 6# solvent for stirring, and then let it stand for 20 minutes Finally, the composition sampling in front of the furnace is carried out. If the composition is qualified, the crucible is closed and left standing, and the melt is set to keep warm at 670°C. When the tempera...

Embodiment 3

[0038] The mass percentage of magnesium alloy components is: Zn: 6.1%, Y: 0.8%, Nd: 0.7%, La: 0.6%, Mn: 0.5%, the balance is Mg, and the mass percentages of Y, Nd and La in the component composition The sum is 2.1% of the total mass fraction.

[0039] making process:

[0040] (1) Add the preheated pure Mg and pure Zn into a low-carbon steel crucible, and protect it with 2# solvent. After the pure Mg and pure Zn are completely melted, add manganese chloride at a solution temperature of 750°C, and wait for the temperature to rise. Add Mg-30La, Mg-30Nd and Mg-30Y master alloys respectively when the temperature is as high as 800°C. After complete melting, blow Ar gas for 20 minutes for purification treatment. During this process, add 6# solvent for stirring, and then let it stand for 18 minutes. Finally, the composition sampling in front of the furnace is carried out. If the composition is qualified, the crucible is closed and left standing, and the melt is set to keep warm at 68...

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Abstract

The invention provides low-cost high-strength-tenacity wrought magnesium alloy. The low-cost high-strength-tenacity rought magnesium alloy contains Zn, Y, Nd, La, Mn, Mg and unavoidable impurities, wherein the sum of mass percentages of Y, Nd and La is not more than 2.5% of the total mass fraction. According to the low-cost high-strength wrought magnesium alloy, three specific rare earth elements,namely Y, Nd and La are adopted, the sum of mass percentages of the rare earth elements is not more than 2.5% of the total mass fraction of the magnesium alloy, and Zn, Mn and Mg are combined so as to realize multi-element alloying, so that the mutual influences among the elements are reduced, the solid solubility of the elements in a matrix is reduced, the yield of the rare earth elements is increased, the utilization efficiency of the rare earth elements is improved, the strengthening effect of the alloy is obviously improved under a relatively low rare earth addition rate, the alloy has high strength and tenacity, the room temperature extension strength is more than or equal to 420MPa, the percentage elongation after fracture is more than or equal to 7%. A preparation method of the low-cost high-strength-tenacity wrought magnesium alloy is simple and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of metal materials and metallurgy, and in particular relates to a low-cost high-strength toughness deformed magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloys have the advantages of low density, high specific strength, low rigidity, large impact energy absorption, easy machining and easy recycling, and are currently being increasingly widely used in the fields of automobiles, aerospace, electronics, etc., and are considered It is an ideal material that effectively reduces weight, saves energy, is environmentally friendly, and is conducive to sustainable development. With the expansion of the scope of application of magnesium alloys, the demand for magnesium alloys in related industries is increasing day by day. Although magnesium alloys have obvious advantages in light weight, their low-strength characteristics seriously restrict the scope of application. In or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C1/03C22F1/06
CPCC22C1/03C22C23/04C22F1/06
Inventor 夏祥生陈强舒大禹胡传凯林军康凤
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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