High-work-hardening magnesium alloy and preparation method thereof

A work hardening, magnesium alloy technology, applied in the field of metal materials, can solve problems such as poor plasticity, and achieve the effects of improving plasticity, reducing magnesium stacking fault energy, and high strength and toughness

Inactive Publication Date: 2012-06-27
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cast magnesium alloys can form complex shapes and are favored in production, but the disadvantage of cast magnesium alloys is poor plasticity, such as AZ91 series alloys

Method used

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  • High-work-hardening magnesium alloy and preparation method thereof
  • High-work-hardening magnesium alloy and preparation method thereof
  • High-work-hardening magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Prepare materials according to the composition content of magnesium alloy: 2.9% tin, 1.1% zinc, and the rest are magnesium and unavoidable impurities;

[0028] (2) Prepare materials according to the above-mentioned magnesium alloy composition content; use No. 2 solvent for protection, melt the pure magnesium ingot, and then add pure tin and pure zinc preheated at 80-120°C;

[0029] (3) Gas blowing, stirring, refining, slag removal, and after standing still, the melt is directly cast into ingots, and then the ingots are hot-extruded into pipes, profiles or plates; among them, casting Mg-2.9Sn-1.1Zn Tensile strength σ b ≥165MPa, elongation δ≥19%, work hardening ability Hc≥3.69, work hardening index n≥0.574.

Embodiment 2

[0031] (1) Prepare materials according to the composition content of magnesium alloy: tin 4.0%, zinc 3.5%, added elements: silicon 0.5%, antimony 1.0%, tellurium 1.0%, strontium 0.03%, manganese 0.5%, the rest is magnesium and unavoidable impurities ;

[0032] (2) Prepare materials according to the above-mentioned magnesium alloy composition content; use No. 2 solvent for protection, melt the pure magnesium ingot, and then add pure tin and pure zinc preheated at 75-135°C;

[0033] (3) Adding additional elements: first add silicon, antimony and tellurium elements, stir well and then add strontium and manganese; among them, silicon, antimony and tellurium elements are introduced in the form of pure silicon, pure antimony and pure tellurium, while strontium and manganese are introduced in the form of commercial The standard magnesium master alloy is introduced, and the mass percentage content of the elements in the commercial standard magnesium master alloy is 10-15;

[0034] (4...

Embodiment 3

[0036] (1) Prepare materials according to the composition content of magnesium alloy: tin 3.5%, zinc 2.5%, added elements: silicon 0.1%, antimony 0.5%, tellurium 0.5%, strontium 0.15%, manganese 0.2%, the rest is magnesium and unavoidable impurities ;

[0037] (2) Prepare materials according to the above-mentioned magnesium alloy composition content; use No. 2 solvent for protection, melt the pure magnesium ingot, and then add pure tin and pure zinc preheated at 140-170°C;

[0038] (3) Adding additional elements: first add silicon, antimony and tellurium elements, stir well and then add strontium and manganese; among them, silicon, antimony and tellurium elements are introduced in the form of pure silicon, pure antimony and pure tellurium, while strontium and manganese are introduced in the form of commercial The standard magnesium master alloy is introduced, and the mass percentage content of the elements in the commercial standard magnesium master alloy is 10-15;

[0039] (...

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Abstract

The invention relates to a high-work-hardening magnesium alloy and a preparation method thereof, which belong to the field of metal materials. The alloy comprises the following chemical components in percentage by mass: 2.3-4.5 percent of tin, 0.1-3.85 percent of zinc and the balance of magnesium and unavoidable impurities; the magnesium alloy can further comprise one or more of 0.01-2.0 percent by mass of silicon, 0.01-3.0 percent of antimony, 0.01-3.0 percent by mass of tellurium, 0.01-1.5 percent by mass of strontium, 0.01-2.0 percent by mass of manganese and 0.01-3.0 percent by mass of rare earth elements; and the rare-earth elements include neodymium, lanthanum, yttrium and cerium. The preparation method comprises the following steps of: melting magnesium, adding tin and zinc, and adding additive elements and rare earth elements; and blowing, stirring, refining, removing slag, standing, directly pouring a melt into an ingot, and thermally extruding into a tubular product, a section or a plate. The alloy has the advantages of high-work-hardening capability, high plastic molding, simple and reliable preparation process, easiness for popularizing and application, and the like.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a high work-hardening magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium is the metal with the lowest density among all structural metals. Magnesium alloys have a series of advantages, such as low density, high specific strength and specific stiffness, excellent machinability and castability, good damping and shock absorption, high thermal Conductivity, high dimensional stability, excellent electromagnetic shielding performance and recyclability, etc. It is favored in the selection of materials in aviation, aerospace, automobile and other fields. In addition, magnesium alloys have good application prospects in cameras, digital products, digital audio and other products. However, due to the close-packed hexagonal structure of magnesium crystals, there are few slip systems and poor plasticity; in addition, magnesium alloys have low strength an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/02C22F1/06
Inventor 王慧远罗丹姜启川王金国陈磊欧阳子腾王珵南小龙王艳鹏
Owner JILIN UNIV
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