High-damping shape memory alloy

A memory alloy and high damping technology, applied in the field of damping materials, can solve the problems of Cu-Zn-Al shape memory alloys with inferior mechanical properties, processability and corrosion resistance, high cost of TiNi shape memory alloys, and limited application of damping alloys, etc. , to achieve the effect of remarkable economy, excellent comprehensive performance and lower application cost

Inactive Publication Date: 2005-09-14
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0007] However, when the shape memory alloy is used as a damping material, it must be in a martensitic state, that is, the end point of the martensitic phase transformation of the alloy should be higher than the working temperature of the alloy; in addition, compared with the traditional high damping alloy, TiNi shape memory Alloys are expensive and expensive, and the material properties of Cu-Zn-Al shape memory alloys such as mechanical properties, processability and corrosion resistance are far inferior to TiNi shape memory alloys, which greatly limit their application as damping alloys

Method used

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Embodiment 1

[0028] Ti50Ni24Cu25Y and Ti50Ni25Cu25 alloys were prepared by vacuum induction melting.

[0029] 1. Put the sponge titanium, electrolytic nickel and oxygen-free copper prepared according to the atomic ratio into a vacuum induction furnace for melting;

[0030] 2. For Ti50Ni24Cu25Y alloy, add element Y into the molten pool 1 minute before it comes out of the furnace;

[0031] 3. Pouring at 1420-1450°C, pouring the molten Ti50Ni24Cu25Y and Ti50Ni25Cu25 alloys into the mold shell or crucible;

[0032] 4. After the mold shell or crucible is cooled, the alloy can be taken out;

[0033] 5. According to the needs, carry out necessary heat treatment and machining on the alloy, and prepare Ti50Ni24Cu25Y and Ti50Ni25Cu25 alloy products or experimental samples;

[0034] 6. The thermoelastic martensitic phase transition temperature of Ti50Ni24Cu25Y and Ti50Ni25Cu25 alloys was measured on a Rheometric Scientific DSC SP instrument. DSC experimental conditions: heating and cooling rate is ...

Embodiment 2

[0040] Ti50Ni(25-x)Cu25Yx(x=0, 0.1, 0.3, 0.5, 1 and 2) alloys were prepared by magnetron tungsten casting (non-consumable) electric arc furnace protected by argon.

[0041] 1. Put the industrially pure titanium, electrolytic nickel, oxygen-free copper and element Y prepared according to the atomic ratio into the water-cooled copper crucible of the argon-protected magnetron tungsten casting (non-consumable) electric arc furnace;

[0042]2. Heating and magnetic stirring to smelt the alloy;

[0043] 3. Melt the alloy repeatedly for 3 times (or more) to ensure the uniformity of the alloy composition;

[0044] 4. After the crucible is cooled, the alloy ingot can be taken out;

[0045] 5. According to the needs, carry out necessary heat treatment and machining on the alloy to prepare Ti50Ni(25-x)Cu25Yx alloy products or experimental samples;

[0046] 6. The thermoelastic martensitic phase transition temperature of Ti50Ni(25-x)Cu25Yx alloy was measured on Rheometric Scientific DSC ...

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Abstract

The present invention relates to a high-damping marmem. In the original marmem Ti-Ni-Cu the trace rare earth element Y is contained, the content of Y is 0.01-5 at%. Said invented high-damping alloy utilizes the regulation of content of constituent element Cu and Y can raise and control martensific phase transformation temperature of the alloy so as to obtain high-damping alloy with wider working temperature range. Said invented high-damping alloy can be smelted by adopting vacuum induction smelting process or electric arc process, can be directly prepared into the antivibration component product. Said invented high-damping marmem has excellent damping performance, wider application range, lower cost and excellent antifriction, wear-resisting and corrosion-proofing properties.

Description

Technical field: [0001] The invention relates to a damping material, in particular to a novel high damping shape memory alloy. Background technique: [0002] With the development of modern science and technology, the control of vibration, shock and noise is becoming more and more important. For example, the analysis of failures of rockets and satellites shows that about 2 / 3 of failures are related to vibration and noise. In addition, vibration and noise can also pollute the environment and endanger people's physical and mental health. Therefore, the research on vibration and noise reduction technology and related materials has been paid more and more attention by people. [0003] The damping performance of some alloys is tens of times to several orders of magnitude higher than that of ordinary metal materials (the damping coefficients of common metal materials are shown in Table 1). Using them to prepare mechanical equipment or instrument components can start with seismic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C30/00
Inventor 朱圣龙张峻巍王福会
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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