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

A high-strength, mg-y-ni-mn technology, applied in the field of wrought magnesium alloys and its manufacturing, can solve the problems of only 1.1% elongation, increase the difficulty of alloy preparation, and low alloy elongation, so as to improve the strength at room temperature Toughness, easy operation, and simple alloying element formula

Active Publication Date: 2017-09-29
CHONGQING UNIV
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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%.
The invention involves pre-deformation and strong rapid compression deformation, which will increase the difficulty of alloy preparation, and the alloy has a low elongation

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: A high-strength Mg-Y-Ni-Mn alloy, alloy composition (weight percent): Y-10.2%, Ni-4.4%, Mn-0.45% less than 0.1% of impurity elements, and the rest is Mg.

[0026] The manufacture method of this high-strength Mg-Y-Ni-Mn alloy is carried out as follows:

[0027] Step 1: In a vacuum melting furnace, the ingot is melted, and argon is introduced for protection, and alloying elements are added according to weight percentage Y=10.2%, Ni=4.4%, Mn-0.45%. Among them, Y and Ni are added in the form of 30Y-70Ni master alloy, and Mn is added in the form of Mg-3Mn master alloy.

[0028] 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.

[0029] Step 2: Homogenize the smelted magnesium alloy ingot. The process parameters are: put the ingot into the furnace and raise the temperature to 540°C, then stop the furnace and cool down to 450°C af...

Embodiment 2

[0034] Example 2: A high-strength Mg-Y-Ni-Mn alloy, alloy composition (weight percent): Y-5.2%, Ni-2.2%, Mn-0.82%, less than 0.1% of impurity elements, and the rest is magnesium.

[0035] The manufacture method of this high strength Mg-Ni-Y alloy is the same as embodiment 1.

Embodiment 3

[0036] Example 3: A high-strength Mg-Y-Ni-Mn alloy, alloy composition (weight percent): Y-7.8%, Ni-3.4%, Mn-0.59%, less than 0.1% of impurity elements, and the rest is magnesium.

[0037] The manufacture method of this high strength Mg-Ni-Y alloy is the same as embodiment 1.

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Abstract

The invention relates to high-strength Mg-Y-Ni-Mn alloy and a manufacturing method thereof. The high-strength Mg-Y-Ni-Mn alloy comprises 5.0-12.5% of Y, 2.0-6.0% of Ni, 0.4-1.0% of Mn and the balance magnesium and inevitable impurities. The alloy is manufactured through the following process of material preparing, vacuum melting ingot casting, cyclic homogenizing annealing, extruding and double aging. Materials do not need to be refined; the extrusion ratio is low (lambda=11); the limitations that the manufacturing process of high-performance magnesium alloy is complex and the manufacturing conditions are rigorous are broken; the process is simple; transportability is high; operation is easy, the room temperature tensile strength and the yield strength of the alloy are obviously improved; the high-performance magnesium alloy can be directly produced under existing industrial conditions; the problem that the application of the Mg alloy is limited due to the poor mechanical performance of the Mg alloy is solved; and the application range of the magnesium alloy is expanded.

Description

technical field [0001] The present invention relates to a deformed magnesium alloy and a manufacturing method thereof, in particular to a high-strength Mg-Y-Ni-Mn alloy. The alloy is a quaternary magnesium alloy, including four alloys of Mg, Y, Ni and Mn Elements, the high strength refers to the material can achieve a tensile strength ≥ 510MPa. 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 rail transportation, and electronic communications. However, due to the low strength of magnesium alloys, it is difficult to be widely ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C23/00C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22C23/06C22F1/06
Inventor 王敬丰秦德昭王炎钰潘复生
Owner CHONGQING UNIV
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