钛合金表面电火花着色及摩擦磨损性能研究

发布时间：2018-01-08 01:33

本文关键词：钛合金表面电火花着色及摩擦磨损性能研究　出处：《长春理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：为增强钛合金表面的观赏性,提高其显微硬度、耐磨性及使用寿命,扩大其应用范围。本文利用高速电火花线切割放电加工技术对Ti-6Al-4V合金表面进行着色与改性。本文从高速电火花线切割原理出发,通过改变放电加工参数,在Ti-6Al-4V合金表面成功制备出六种色调;对着色加工后Ti-6Al-4V合金表面的进行摩擦磨损性能相关的理论分析;针对Ti-6Al-4V合金表面显色机制,利用电子能谱仪和X射线衍射仪设备对着色表面反应膜的元素含量和物相结构进行检测;对着色试样分别进行1000小时的阳光照射和水中浸泡;利用纳米压痕仪分别对抛光基体表面和着色加工表面进行显微硬度检测;利用微摩擦磨损测试仪对着色表面进行不同摩擦时间、不同法向载荷、不同滑动速率单因素变化条件下滑动干摩擦磨损性能分析,评价其着色表面耐磨性。实验结果表明,经过高速电火花线切割加工后的着色表面具有良好的稳定性和耐久性,着色表面的显微硬度均高于基体,且在本文实验中各种单因素变化条件下的着色加工表面的平均摩擦系数均较未着色基体表面降低60%~70%,呈现出优异的减摩性能。该方法大幅增加了钛合金的耐用性,对于扩展其应用范围具有十分重要的意义。
[Abstract]:In order to enhance the surface of titanium alloy ornamental, improving the microhardness, wear resistance and service life, expand its scope of application. This paper uses high speed WEDM discharge machining technology on Ti-6Al-4V alloy surface coloring and modified. This paper cutting from the high-speed electric spark line principle, by changing the discharge machining parameters in Ti-6Al-4V the alloy surface was successfully prepared by six kinds of color; color processing after the performance analysis of the related theory of friction and wear surface of Ti-6Al-4V alloy on the surface of Ti-6Al-4V alloy; chromogenic mechanism, using electron spectroscopy and element content of instrument and X ray diffraction equipment for coloring surface film phase structure of color detection; samples were 1000 hours of sunlight and water immersion respectively; microhardness testing on the substrate surface polishing and coloring processing surface using nano indentation; using micro Different colored surface friction time on friction and wear tester under different normal loads, different slip rate of single factor changes under the condition of dry sliding friction and wear performance analysis, to evaluate the wear surface coloring. The experimental results show that the high speed WEDM coloring surface after processing has good stability and durability, hardness the painted surface was higher than that of the matrix, and in the experiment of single factor under the variation of average friction coefficient on the surface of the coloring process was better than that of non colored surface decreased 60%~70%, showing excellent antifriction performance. This method greatly increases the durability of titanium alloy, is very important to expand its scope of application has significance.

【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG661

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