High strength high plasticity magnesium alloy

A high plasticity, magnesium alloy technology, applied in the field of metal materials, can solve the problems of low price and low strength of M2 alloy, and achieve the effects of improving room temperature and high temperature strength, good solid solution strengthening, and refining grains

Inactive Publication Date: 2011-05-18
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the low strength of existing M2 alloys and the problem that Zr is not suitable for refining grains in Mn-containing alloys, the purpose of the present invention is to provide an alloy that not only has good plastic deformation ability, but also has high strength and low price. Magnesium alloy with low high strength and high ductility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The composition (percentage by weight) of the alloy of the present invention is: 2% Mn, 2% Gd, 0.6% Zr, and the balance is Mg and unavoidable impurities. Prepare the alloy according to the above-mentioned composition, and the introduction of Mn, Gd, Zr elements is all realized by adding Mg-Mn, Mg-Gd, Mg-Zr master alloy, and the weight percentages of Mn, Gd, Zr in the master alloy are respectively 4.10%, 24.50%, 27.85%. The alloy is prepared by semi-continuous stirring and melting casting method. The crucible is cleaned with solvent, and No. 2 solvent is sprinkled on the bottom of the furnace. 2.242kg of Zr master alloy is preheated and added to the crucible, heated, sprinkled with covering agent, and passed into SF 6 and CO 2 Mixed gas protection, stir after melting, let stand for 20min and cast. The alloy was preheated to 480°C, and after extrusion at 450°C, the tensile strength was 205.07MPa, the yield strength was 149.98MPa, and the elongation was 36.75%.

Embodiment 2

[0013] The alloy composition (percentage by weight) is: 2% Mn, 4% Gd, 0.6% Zr, and the balance is Mg and unavoidable impurities. 6.720kg of pure magnesium ingot, 13.586kg of Mg-Mn master alloy, 4.545kg of Mg-Gd master alloy and 3.000kg of Mg-Zr master alloy are used. Its manufacturing process is identical with embodiment 1. Its tensile strength is 205.73MPa, yield strength is 141.99MPa, and elongation is 34.85%.

Embodiment 3

[0015] The alloy composition (percentage by weight) is: 2% Mn, 6% Gd, 0.6% Zr, and the balance is Mg and unavoidable impurities. 6.720kg of pure magnesium ingot, 20.529kg of Mg-Mn master alloy, 10.302kg of Mg-Gd master alloy and 4.533kg of Mg-Zr master alloy are used. Its manufacturing process is identical with embodiment 1. Its tensile strength is 236.63MPa, yield strength is 168.04MPa, and elongation is 32.35%.

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Abstract

The invention discloses a high strength high plasticity magnesium alloy which is used for the field of metallic materials. The magnesium alloy comprises the ingredients by weight percent: 1.3-2.5% of Mn, 2-6% of Gd, 0.1-0.6% of Zr and Mg and unavoidable impurities as the balance. According to the invention, on condition of Mn and Zr as basic ingredient, Gd is added to generate (MgGd) phase and (MgGd) phase refined grain, influencing the distribution of Zr in the alloy, and compared with M2 series alloy, the magnesium alloy with 216MPa of average tensile strength, 153MPa of yield strength and 35% of extensibility is remarkably enhanced in tensile strength, yield strength and extensibility.

Description

technical field [0001] The invention relates to a Mg-Mn series high-strength and high-plasticity magnesium alloy, which belongs to the technical field of metal materials. Background technique [0002] Magnesium alloys have excellent properties such as low density, corrosion resistance, and easy recycling, but their low strength and plastic deformation ability hinder their widespread use. During the smelting process of Mg-Mn alloys, manganese and iron can form Mn-Fe compounds and precipitate at the bottom of the melt, which makes the alloys have high corrosion resistance, but the poor room temperature and high temperature strength limit the alloys. industrial applications. M2 alloy has good plastic deformation ability and low price, and has been widely used. However, its low strength, combined with the low content of alloying elements, cannot be strengthened by heat treatment, so that the application of M2 magnesium alloy in modern industry is seldom. [0003] Zr is an eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C23/06
Inventor 胡耀波潘复生邓娟彭建王敬丰
Owner CHONGQING UNIV
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