A kind of preparation method of ti-nb-fe-o high damping alloy

Abstract

The invention relates to high-damping Ti-Nb-Fe-O alloy and a preparation method thereof. The preparation method comprises the following steps: adding atomic Fe into Ti-Nb alloy to prepare a Ti-Nb-Fe base body, performing surface oxygen solution treatment, diffusing oxygen through a controllable atmosphere to enable oxygen to enter Ti-Nb-Fe base body alloy to form a remarkable oxygen solution layer, and forming a surface oxidation region in a single beta-Ti-phase base body, a double-phase region in the middle and an oxygen-enrichment solid-solution beta-Ti region in a core part. The alloy comprises the following components by weight percent: 60%-75% of Ti, 10%-16% of Nb, 10%-25% of Fe and 0.05%-0.10% of O. The alloy has good damping characteristics. The preparation method of the alloy is low in cost, high in efficiency and simple in process, and the components are accurate and controllable. The alloy is suitably applied to damping structure parts with relatively high service environment temperature.

Description

technical field [0001] The invention relates to a high damping alloy and a preparation method thereof, more specifically, to a Ti-Nb-Fe-O high damping alloy and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, all kinds of mechanical equipment require higher precision and longer service life, while vibration and noise will seriously affect the precision and service life of the equipment. Therefore, in recent years, damping alloys used for vibration and noise control have attracted the attention of industrialized countries in the world, and have developed rapidly. [0003] In the past 50 years of continuous research, according to the attenuation mode of vibration energy caused by different types of structural defects inside the material, three types of traditional high-damping alloys have been roughly formed, that is, dislocation-type high-damping alloys (such as Mg-Zr system high-damping alloys). Damping alloys, Al-Z...

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Problems solved by technology

In addition to the mechanical properties that need to be improved, it is also found in continuous and in-depth research that these high-damping alloys show a common problem in terms of service stability and damping delay: that is, low-dimensional defects in the system (mainly Interstitial atoms and vacancies) are diffusely redistributed under the induction of continuous vibration loads, and gradually enrich in high-dimensional defect regions (such as dislocations, magnetic domain boundaries, (twin) grain boundaries), resulting in pinning, resulting in The relaxation reversibility or relaxation strength of high-dimensional defects gradually decreases or even loses to a certain extent under the action of vibration load, which eventually leads to serious deterioration of the damping performance of the alloy and shortens the service life.

However, this method cannot control the TiO 2 loss, so that the final alloy composition is difficult to control

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