A method for preparing iron-based composite alloy with wide strain amplitude and high damping by high temperature oxidation
A composite alloy, high temperature oxidation technology, applied in the field of damping alloys, can solve the problems of inapplicability and unsatisfactory damping performance, and achieve the effect of high damping performance
Active Publication Date: 2021-02-09
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology
However, it has the following problems: (1) Fe-Mn-based damping alloys have high damping performance only at high strain amplitudes, but the damping performance at low strain amplitudes is not ideal
The above invention has room temperature deformation process and is not suitable for preparing parts with complex shapes
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[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0020] A method for preparing a wide-strain amplitude high-damping iron-based composite alloy by high-temperature oxidation, specifically comprising the following steps:
[0021] Step 1. First oxidize the iron-manganese-chromium-based alloy at 900°C to 1200°C in an air atmosphere for ≥1 hour, and then cool it to room temperature in the furnace; when the heat treatment temperature is lower than 900°C, the iron-manganese-chromium-based alloy will precipitate for a second time. The precipitation of these second phases is not conducive to the high damping performance of the iron-based composite alloy; however, if the heat treatment temperature is too high, it will also lead to the precipitation of high-temperature ferrite in the core of the iron-based composite alloy, which is also not conducive to obtaining high damping performance. damping perfo...
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Abstract
The invention belongs to the field of damping alloys, and particularly relates to a method for preparing a wide-strain-amplitude high-damping iron-based composite alloy through high-temperature oxidation. The method comprises the following steps: 1, enabling an iron-manganese-chromium-based alloy to be subjected to oxidation treatment in the air atmosphere, and carrying out furnace cooling to reach room temperature; 2, removing an oxide layer on the surface; and 3, finally, treating the material at 200-500 DEG C for 2-48 hours, and cooling same in the furnace to the room temperature to preparethe iron-based composite alloy. The method has the beneficial technical effects that the deformation process is avoided; the preparation process can be completed by simple conventional heat treatmentequipment; the prepared iron-based composite alloy has higher damping performance under the condition of wide-strain-amplitude when compared with the iron-manganese-chromium-based alloy treated by atraditional method.
Description
technical field [0001] The invention belongs to the field of damping alloys, and in particular relates to a method for preparing a wide-strain amplitude and high-damping iron-based composite alloy by high-temperature oxidation. Background technique [0002] With the development of industry, the vibration and noise generated by mechanical parts have seriously affected the precision of instruments and the service life of equipment. Therefore, vibration and noise reduction is very important. The usual vibration and noise reduction methods are based on the dynamics of vibration, through special design or increasing the mass of components to reduce the radiation of vibration energy to surrounding components, or to dissipate the vibration energy before it is transmitted. The shortcomings of this type of method are very obvious: large volume, heavy weight, high installation cost, and cannot fundamentally solve the problem of vibration and noise reduction. If the vibration element...
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IPC IPC(8): C22C38/38C22C38/28C22C38/26C23C8/14C21D6/00
CPCC21D6/002C21D6/005C21D2211/001C21D2211/005C21D2211/008C22C38/004C22C38/26C22C38/28C22C38/38C23C8/14
Inventor 张瑞谦陈勇文玉华王辉孙永铎孙超
Owner NUCLEAR POWER INSTITUTE OF CHINA