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A kind of high-strength and high-plasticity mg-gd-y-ni-mn alloy and preparation method thereof

A mg-gd-y-ni-mn, high plasticity technology, applied in the field of wrought magnesium alloy and its manufacturing, can solve the problems of difficult control of metal Zr smelting, elongation of only 1.1%, and increased difficulty in alloy preparation. Easy operation, simple formula, low extrusion ratio effect

Active Publication Date: 2017-08-04
重庆昱华新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patented alloy is pre-deformed into rods by pre-deformation of billets in the casting state, and then prepared by rapid and strong deformation combined with isothermal aging method. The best mechanical property data at room temperature is the tensile strength of 615MPa, but the elongation is only 1.1%.
This invention involves pre-deformation and strong rapid compression deformation, which will increase the difficulty of alloy preparation. The price of metal Zr and its alloys is significantly higher than that of metal Mn and its alloys, which will increase the cost of the alloy. low rate

Method used

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  • A kind of high-strength and high-plasticity mg-gd-y-ni-mn alloy and preparation method thereof
  • A kind of high-strength and high-plasticity mg-gd-y-ni-mn alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: A high-strength and high-plasticity Mg-Gd-Y-Ni-Mn alloy, alloy composition (weight percent): Gd-8.14%, Y-3.83%, Ni-1.51%, Mn-0.76%, impurity elements Less than 0.1%, the rest is Mg.

[0030] The manufacture method of this high-strength and high-plasticity Mg-Gd-Y-Ni-Mn alloy is carried out as follows:

[0031] Step 1: In a vacuum melting furnace, the ingot is melted, and argon is introduced for protection, and alloying elements are added according to the weight percentage of Gd-8.14%, Y-3.83%, Ni-1.51%, and Mn-0.76%. Among them, Gd, Y, Ni, and Mn were added in the form of Mg–30wt%Gd, Mg–25wt%Y, Mg–4wt%Mn, and Ni–30wt%Y master alloys, respectively.

[0032] Insulate at 850°C and stir with electromagnetic induction to fully melt the raw materials. After the alloy is completely melted, continue to stand at 850°C for 10 minutes, and then cast.

[0033] Step 2: Homogenize the smelted magnesium alloy ingot. The process parameters are as follows: put the ingot int...

Embodiment 2

[0038] Example 2: A high-strength Mg-Gd-Y-Ni-Mn alloy, alloy composition (weight percent): Gd-7.25%, Y-4.26%, Ni-2.28%, Mn-0.82%, and impurity elements are less than 0.1%, the rest is magnesium.

[0039] The manufacturing method of this high-strength Mg-Gd-Y-Ni-Mn alloy is the same as that of Example 1.

Embodiment 3

[0040] Example 3: A high-strength Mg-Gd-Y-Ni-Mn alloy, alloy composition (weight percent): Gd-6.82%, Y-4.83%, Ni-1.13%, Mn-0.59%, and impurity elements are less than 0.1%, the rest is magnesium.

[0041] The manufacturing method of this high-strength Mg-Gd-Y-Ni-Mn alloy is the same as that of Example 1.

[0042] Table 2 is a table of mechanical properties of the high-strength Mg-Gd-Y-Ni-Mn alloy described in Examples 2-5.

[0043]

[0044] The invention proposes that Mg, Gd, Y and Ni form a large number of long-period phases in the Mg-Y-Ni-Mn alloy, which can play a significant effect of dispersion strengthening. Then through extrusion deformation and multi-stage heat treatment to enhance the strengthening effect, adding an appropriate amount of Mn element, through process control, the Mn is dispersed in the form of single particles to further refine the grains and improve the mechanical properties. This process is solid solution strengthening and deformation strengthening...

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Abstract

The invention relates to a high-strength high-plasticity Mg-Gd-Y-Ni-Mn alloy material and a preparing method of the alloy material. The alloy comprises, by mass percent, 5.0% to 12.5% of Gd, 2.0% to 5.0% of Y, 1.0% to 3.0% of Ni, 0.4% to 1.0% of Mn, and the balance magnesium and inevitable impurities. The method comprises the steps of material preparing, ingot casting vacuum smelting, homogenizing annealing, extruding and aging. The material does not need to be refined, the extrusion ratio is low (lambda is equal to 11), the limitation that the high-performance magnesium alloy preparing technology is complex, and the preparing condition is poor is broken through, the technology is simple, the transportability is high, operation is easy, the room temperature tensile strength and the yield strength of the alloy material are obviously improved, an existing industrial condition can directly produce a high-performance magnesium alloy, the problem that due to the low mechanical performance, application of the Mg alloy is limited is solved, and the application range of the magnesium alloy is expanded.

Description

technical field [0001] The invention relates to a deformed magnesium alloy and a manufacturing method thereof, in particular to a high-strength Mg-Gd-Y-Ni-Mn alloy. The alloy is a five-element magnesium alloy comprising Mg, Gd, Y, Ni and Mn five alloying elements, the high strength refers to the tensile strength that the material can achieve ≥ 450MPa, and the highest elongation at break ≥ 9%. The highest tensile strength can reach 510MPa, and the elongation at break is 10%. Background technique [0002] The elastic modulus of magnesium is relatively small, and it can produce large deformation under the action of force. Therefore, under the action of impact load, magnesium alloy can absorb large impact energy and can manufacture impact-resistant parts. Magnesium and its alloys, as the lightest commonly used metal structural materials, have attracted more and more attention, and have been applied to a certain extent in the fields of national defense, aerospace, high-speed rai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
CPCC22C1/03C22C23/06C22F1/06
Inventor 王敬丰刘世杰黄崧潘复生
Owner 重庆昱华新材料科技有限公司
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