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Wide-strain amplitude high-damping iron-based composite alloy and preparation method thereof

A composite alloy, high damping technology, applied in the field of damping alloys, can solve problems such as damping performance attenuation, achieve high damping performance, and solve the effect of rapid damping performance decline

Inactive Publication Date: 2018-01-30
SICHUAN UNIV
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Problems solved by technology

In addition, ferromagnetic damping alloys, although at low strain amplitudes (≤2.0×10 -4 ) has high damping performance, but when the strain amplitude exceeds 2.0×10 -4 The damping performance decays rapidly when

Method used

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  • Wide-strain amplitude high-damping iron-based composite alloy and preparation method thereof
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  • Wide-strain amplitude high-damping iron-based composite alloy and preparation method thereof

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It is worth noting that the given embodiments can not be interpreted as limiting the protection scope of the present invention, and some non-essential improvements and adjustments made by those skilled in the art according to the content of the present invention above should still belong to the protection of the present invention. scope.

[0015] Damping performance test. The damping properties of alloys (Q -1 ) as a function of strain (γ). The vibration frequency is 1Hz, and the test temperature is 30°C.

[0016] Microstructural characterization. The metallographic phase of the alloy was observed with an OLYMPUS GX51 optical microscope. The polished metallographic sample was in 20% HClO 4 +80%CH 3 Electrolytic polishing in COOH (volume fraction) solution, followed by NH 4 HF 2 and K 2 S 2 o 5Corrosion in an aqueous solution with a mass ratio ...

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Abstract

The invention discloses a wide-strain amplitude high-damping iron-based composite alloy and a preparation method thereof and belongs to the field of damping alloys. The surface of the iron-based composite alloy disclosed by the invention adopts a layer of ferrite; the core part of the iron-based composite alloy consists of austenite of a face-centered cubic structure and martensite of a close-packed hexagonal structure; the weight percentage content of chromium in the ferrite layer is greater than or equal to 4%. The preparation method of the iron-based composite alloy specifically comprises the following steps: firstly, treating a ferro-manganese chromium based alloy in a vacuum environment for a time greater than or equal to 15 minutes at 900-1200 DEG C, performing furnace cooling to theroom temperature, finally treating for 2-48 hours at 200-500 DEG C, and performing furnace cooling to the room temperature, wherein the ferro-manganese chromium based alloy comprises the following elements in percentage by weight: 12-25% of Mn, 3-25% of Mg, 0-0.1% of C, 0-0.1% of N and the balance of Fe and inevitable impurities.

Description

technical field [0001] The invention relates to the field of damping alloys, in particular to an iron-based composite alloy with high damping performance under wide strain amplitude and a preparation method thereof. Compared with existing damping alloys, the iron-based composite alloys prepared by this method all have high damping properties under wide strain amplitudes. Background technique [0002] With the development of industry, the power and speed of various machinery are increasing, and the harmful noise caused by vibration is also increasing. Harmful vibration has seriously affected the precision and service life of instruments and equipment, and reduced the reliability of mechanical parts. Therefore, vibration and noise reduction is very important in any field. The usual noise reduction methods are based on the dynamics of vibration, through special design or increasing the mass of components to reduce the radiation transmission of vibration energy to surrounding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C22C38/30C22C38/02C22C38/28C22C38/26C22C30/00C21D1/773
Inventor 文玉华钱柄男王勇宁彭华备
Owner SICHUAN UNIV
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