摘要本文研究对象是TC4钛合金,其具有高的强度和耐腐蚀性,但是,它同时具备硬度较低,耐磨性较差的特点。因此,本实验通过液相等离子电解技术在钛合金的表面生成C、N的渗层,能够有效改善合金的一些性能。实验中通过改变直流电压的大小以及电解时间,频率量来获得不同工艺下的试样。利用X射线衍射(XRD),扫描电子显微镜(SEM)和能量色散X射线光谱(EDS)对各试样进行分析,总结出钛合金渗层的组织特征和结构特点。通过实验发现,当直流电压为300V、时间为30分钟,频率100Hz时组织形貌为多孔状,孔隙率最大。所得的渗层耐磨性以及硬度最好,摩擦系数可以达到0。1,最大硬度可以达到370HV0。05,因此能有效改善钛合金在耐磨性和硬度上的缺陷。87844
毕业论文关键词:等离子体电解碳氮共渗,腐蚀,摩擦和磨损, 脉冲频率
毕业设计说明书外文摘要
Title Titanium and titanium alloy surface liquid cathode plasma study of microstructure and properties of carbonitriding
Abstract The object of this paper is TC4 titanium alloy, which has high strength and corrosion resistance。 However, it has the characteristics of low hardness and poor wear resistance。 Therefore, this experiment through the liquid phase plasma electrolysis technology in the surface of titanium alloy to generate C, N of the layer, can effectively improve some of the properties of the alloy。 By changing the size of the DC voltage and the electrolysis time, the frequency of the sample under different processes is obtained。 By using X - ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X - ray spectrum (EDS), the structure characteristics and structure characteristics of the infiltrated layer of titanium alloy were summarized。 It was found that when the DC voltage was 400V and the time was 30 minutes, the microstructure was porous and the porosity was maximum when the frequency was 100Hz。 The friction coefficient can reach 0。1, and the maximum hardness can reach 370HV0。05, so it can effectively improve the wear resistance and hardness of titanium alloy。源-于,优Y尔E论W文.网wwW.yOueRw.com 原文+QQ752018`766
Keywords :Plasma electrolytic carbonitriding, Corrosion, Friction and wear,Pulse frequency
目 次
摘 要 I
Abstract II
目 录 III
1 绪论 1
1。1钛合金表面改性技术简介 1
1。1。1 钛合金简介 1
1。1。2 钛合金表常见表面改性方法 2
1。2 液相等离子体电解技术简介 3
1。3 液相等离子电解技术在钛及钛合金表面改性的研究现状 3
1。4 本课题研究目的与内容 5
2 实验研究方法 7
2。1 实验材料及实验设备 7
2。1。1 实验材料 7
2。1。1 实验装置 7
2。2 分析与测试方法 8
2。2。1 形貌观察和成分分析 8
2。2。2 相组成分析 8
2。2。3 显微硬度测试 9
2。2。4 耐磨性测试