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摘要科学技术日新月异，对高强高弹性合金提出越来越高的要求。因为Cu-Ti合金具有良好的性能和发展的潜力，完全能成为新的能替代昂贵和有毒Cu-Be合金的新材料。因其优异的机械性能和优越的导电率，Cu-Ti合金已用于电子组件(如连接器,继电器控制）等很多领域，铜钛合金都可以起到替代铜铍合金的作用。87771
本次实验首先对铜钛合金进行样品处理，分别在不同温度不同时间下进行时效处理。观察CuTi2。0和CuTi3。0原样分别250℃、350℃、450℃、550℃四种温度下分别进行2h、4h、6h、8h保温时间后的组织及其性能变化。然后，对样品进行拉伸测其抗拉强度，测其硬度，导电性，进行XRD物相分析，金相组织观察析出相的大小与分布。
通过欠时效、时效和过时效三个过程，发现铜钛合金的抗拉强度和硬度随时间延长和温度升高，先升高，再降低，而其导电性先增加后减小。最后，进行性能比，选出的最佳时效工艺为：350℃×4h，CuTi2。0抗拉强度最好达到最大值965MPa,CuTi3。0抗拉强度最好达到最大值880MPa。此时，CuTi2。0导电率为13%，CuTi3。0导电率为11。2%。
毕业论文关键词：铜钛合金，时效，抗拉强度，硬度，导电率
毕业设计说明书外文摘要
Title Study on Micro structure and properties of Cu-Ti high strength and high elastic alloy
Abstract With the rapid development of science and technology, more and more requirements for high strength and high elastic alloys are put forward。 Because Cu-Ti alloy has a good performance and development potential, can completely become a new alternative to the expensive and toxic Cu-Be new materials。 Due to its excellent mechanical properties and excellent electrical conductivity, Cu-Ti alloy has been used in many areas such as electronic components (such as connectors, relay control), copper and titanium alloy can play a role in the substitution of copper beryllium alloy。 From+优`尔^文W网wWw.YouErw.com 加QQ75201^8766
In this experiment, we first made a sample of copper and titanium alloy, and then made the tensile sample, and then the aging treatment of the orthogonal test under different temperature and different time。 On the CuTi2。0 and CuTi3。0 are respectively 250 degrees Celsius, 350 degrees Celsius, 450 degrees Celsius, 550 degrees Celsius, four temperatures, respectively, 2h, 4h, 6h, 8h after the heat preservation time of the organization and its performance changes。 Then, the tensile strength of the sample was measured, and the hardness, conductivity and XRD were selected to observe the composition of the material, and the micro structure of the internal atoms and molecules was observed。
The tensile strength and hardness of Cu Ti alloy was found to be increased with time and temperature, and then the conductivity of the copper alloy was increased, and the conductivity increased with the increase of the time and temperature of the three processes。 Finally, the performance ratio, because there are not contradictory and unified copper titanium alloy tensile strength and electrical conductivity of, selected the best aging process is: the maximum tensile strength and hardness of the aging process to 350 DEG C ×4h, maximum conductivity of aging process for 450 DEG C ×6h。
Key words: copper titanium alloy, aging, tensile strength, hardness, electrical conductivity
1 引言 1
1。1 选题背景和研究意义 1
1。3 热处理原理及铜钛合金的热处理 2
1。4 时效处理及其强化方式