Low-density high-damping aluminum based damping alloy and preparation method thereof

A vibration-damping alloy, aluminum-based technology, applied in the field of alloy materials, can solve the problems of insufficient casting performance, limited application scope, low mechanical strength, etc., and achieve the effects of improving damping performance, simple smelting and processing methods, and low heat treatment costs.

Active Publication Date: 2014-08-13
NINGBO SYRNMA METAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the Al-Mg alloy, the damping coefficient of the alloy can be maintained at a high value at a lower density (~2.6 g / cm3), but the castability of the material is insufficient and the mechanical strength is low , poor corrosion resistance, the scope of application as a high damping material is greatly limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A density of 2.7 g / cm 3 About the aluminum base high damping alloy material. The smelting and casting method of the material is as follows: put the raw materials respectively occupying the total weight of the raw materials as Al: 80 wt%, Mg: 9wt%, Zn: 7 wt%, Si: 3wt%, Cu: 1 wt% into the vacuum induction furnace Inside. After vacuuming, the material is melted by induction with argon protection, and the temperature is heated to about 800°C to form an alloy melt and held for 10 minutes to achieve uniform composition. Using the squeeze casting process, introduce the mold cavity at 720°C and start to apply pressure (90MPa) within 10 seconds. After it is completely solidified, open the mold and take out the casting. The heat treatment process of the material is as follows: heat preservation at 400°C for 4 hours and water quenching to room temperature. It was then kept at 160°C for 20 hours and water cooled to room temperature. Damping performance (SDC: ~15%) and strength...

Embodiment 2

[0018] A density of 2.7g / cm 3 About the aluminum base high damping alloy material. The smelting and casting method of the material is as follows: put the raw materials respectively occupying the total weight of raw materials as Al: 75 wt%, Mg: 8 wt%, Zn: 8 wt%, Si: 4 wt%, Cu: 5 wt% into a vacuum induction furnace Inside. After vacuuming, the material is melted by induction under the protection of argon, and the temperature is heated to about 850°C to form an alloy melt and held for 10 minutes to achieve uniform composition. Using the squeeze casting process, introduce the mold cavity at 740°C and start to apply pressure (80MPa) within 10 seconds. After it is completely solidified, open the mold and take out the casting. The heat treatment process of the material is as follows: heat preservation at 420°C for 4 hours and water quenching to room temperature. It was then incubated at 180°C for 20 hours and water cooled to room temperature. Damping performance (SDC: ~14%) and ...

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Abstract

The invention discloses a low-density high-damping aluminum based damping alloy and a preparation method thereof. The alloy comprises 70-80% of Al, 5-10% of Mg, 5-10% of Zn, 3-5% of Si and 1-6% of Cu. The preparation method comprises the following steps: putting all raw materials in a vacuum induction furnace, carrying out induction melting, heating to 700-900DEG C to form an alloy melt, and carrying out heat insulation for 10min to realize component homogenization; introducing the above obtained melt into a die cavity at 700-800DEG C, applying a pressure of 80-100MPa within 10s by adopting an extrusion casting technology, carrying out die opening after the introduced melt completely solidifies, and taking the obtained casting; carrying out heat treatment on the above obtained material by carrying out heat insulation at 380-450DEG C for 4h and carrying out water quenching to room temperature; and carrying out heat insulation at 120-220DEG C for 20h, and carrying out water cooling to room temperature. The low-density high-damping aluminum based damping alloy id prepared by treating an aluminum alloy as a base, adopting a multi-component alloy technology and controlling the ratio of Mg to Zn. The damping capacity (SDC) of the alloy can reach about 15%, and the density maintains at about 2.7g / cm<3> in order to meet lightweight requirements of alloy materials in the weapon and traffic fields.

Description

[0001] technical field [0002] The invention relates to an alloy material, in particular to a low-density high-damping aluminum-based vibration-damping alloy. Background technique [0003] The rapid development of industry has put forward higher performance, efficiency and precision requirements for modern machinery. On an international scale, the vibration and noise accompanying the high-speed and high-power machinery have increasingly polluted the environment, and at the same time seriously affected the quality, accuracy and life of electronic devices and instruments. High damping alloy is a new type of metal functional material that can effectively convert mechanical vibration energy into heat energy to achieve the goal of vibration reduction and noise reduction. High damping alloys have both the strength of metallic materials and the high damping characteristics of non-metallic materials. The damping structure made of high damping alloy can effectively reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C21/10C22C21/18C22F1/047C22F1/053C22F1/057
Inventor 刘亚军曹贺全曹帅郭强
Owner NINGBO SYRNMA METAL MATERIALS CO LTD
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