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High-damping and high-strength Mg-Cu-Mn-Zn-Y alloy and manufacturing method thereof

A high damping and alloy technology, applied in the field of high damping and high strength Mg-Cu-Mn-Zn-Y alloy and its manufacturing, can solve the problems of limited application range, poor corrosion resistance, damage dislocation mechanism, etc., and achieve a simple and mature process , strong portability and wide versatility

Inactive Publication Date: 2012-09-05
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

However, the application range of this alloy is limited due to high preparation cost, unstable performance and poor corrosion resistance.
[0004] In the close-packed hexagonal crystal structure of magnesium alloys, there are multiple slip systems and multiple slip modes, but the dislocation pinning phenomenon produced in the solid solution strengthening and precipitation strengthening of alloying elements destroys the formation of damping. The original dislocation mechanism of

Method used

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  • High-damping and high-strength Mg-Cu-Mn-Zn-Y alloy and manufacturing method thereof
  • High-damping and high-strength Mg-Cu-Mn-Zn-Y alloy and manufacturing method thereof

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specific Embodiment approach 1

[0029] Embodiment 1: The high-damping high-strength magnesium alloy of this embodiment is a Mg-Cu-Mn-Zn-Y alloy, and the weight percentages of each component are: Cu=2.2%, Mn=0.8%, Y=0.5%, Zn =1.5%, the unavoidable impurities are Si and Fe, the total amount of which is <0.1%, and the balance is magnesium. Put industrially pure magnesium with a purity greater than 99.9% into a ceramic crucible preheated to 300°C for heating and melting, and pass through argon for protection. At 700°C, according to the weight percentage Cu=2.8%, Mn=0.9%, Y=0.5%, Zn=1.5% Add alloy elements. Wherein Cu, Mn, Y and Zn are respectively added in the form of Mg-30wt.% Cu master alloy, Mg-4.1wt.% Mn master alloy, Mg-30.30wt.% Y master alloy and pure Zn. Continue to heat up to 850°C, keep warm and stir to fully melt the intermediate alloy. After the alloy is completely melted, keep it at 850°C for 3 minutes; add refining agent for 3 minutes of refining treatment, and then stand still at 750°C for 10 min...

specific Embodiment approach 2

[0030] Embodiment 2: The smelted magnesium alloy ingot is subjected to homogenization treatment, and the process parameters are: temperature 380° C., time 15 hours. After the homogenization treatment, the magnesium alloy ingot is subjected to conventional hot extrusion, the extrusion temperature is 350° C., the extrusion ratio is 20-25, and the extrusion speed is constant. The properties of the magnesium alloy are shown in Table 1, where the damping performance refers to the room temperature damping performance of the alloy under the conditions of a strain amplitude of 0.001 and a vibration frequency of 1HZ.

specific Embodiment approach 3

[0031] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 is that after pure magnesium is melted and heated to 700°C, according to weight percentage Cu=2.4%, Mn=1.0%, Y=1.9%, Zn=4.7% Add alloying elements. The properties of the magnesium alloy are shown in Table 1, where the damping performance refers to the room temperature damping performance of the alloy under the conditions of a strain amplitude of 0.001 and a vibration frequency of 1HZ.

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Abstract

The invention relates to high-damping and high-strength Mg-Cu-Mn-Zn-Y alloy and a manufacturing method thereof. The high-damping and high-strength Mg-Cu-Mn-Zn-Y alloy is characterized by comprising the following alloying element components distributed in the alloy and the content value thereof in percent by weight: 1.0%-4.0% of Cu, 0.3%-1.5% of Mn, 0.3%-4.0% of Y, 1.0%-5.5% of Zn and the balance of magnesium. In order to solve the conflict of the damping property and the mechanical property of the magnesium alloy, the invention puts forward the fact that a Zn element and a Y element are addedin the high-damping Mg-Cu-Mn alloy so that the Mg, the Zn and the Y form quasicrystals and / or long-prepared phases in the alloy, the quasicrystals or the long-prepared phases can introduce a great amount of new movable dislocations in a magnesium matrix, the damping property of the magnesium alloy is improved through movable dislocations newly increased in the magnesium matrix, and then the conventional heat extrusion is carried out on the alloy so that the mechanical property of the alloy is improved. The invention has the advantages of simple process, strong transportability, easy operationand lower cost and solves the problem that the Mg alloy has limited application due to high damping property and low mechanical property, and the used equipment is conventional and general equipment.

Description

technical field [0001] The invention relates to a magnesium alloy material technology which has high damping characteristics and can improve its mechanical properties, especially a high-damping high-strength Mg-Cu-Mn-Zn-Y alloy and its manufacturing method. The alloy is a five-element Magnesium alloys include five alloy elements of Mg, Cu, Mn, Y and Zn. The high damping means that the material can achieve a damping value ≥ 0.01, and the high strength means that the material can achieve a tensile strength ≥ 300 MPa. Background technique [0002] The development of modern weapons and equipment is becoming increasingly lightweight, high-speed and high-power, and the problems of vibration and noise caused by this have become particularly prominent. In addition, various vehicles and 3C products (Computer, Communication, Consumption Electronics Products) put forward more urgent requirements for structural lightweight and vibration and noise reduction. Therefore, metal structural ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C23/04C22C23/06C22F1/06
Inventor 王敬丰潘复生魏文文李龙柳青
Owner CHONGQING UNIV
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