摘要：随着电子产品集成度的提高，散热问题也日益严重，新一代微通道换热器的研究也面临着复杂零部件难以制造的问题，尤其作为换热液体通道的超细金属管使用传统工艺并不能达到其使用精度。电沉积法制造超细金属管可在成型精度、力学性能以及产品可包含的细节等方面上优于传统的塑性变形工艺以及切削加工等工艺。因此开展电沉积法制造超细金属管工艺探索具有重要理论意义和实用价值。

本文设计了一条超细金属管电沉积成型工艺流程，并使用正交实验法探究了化学镀时间、电流密度、及电源属性三个因素对电沉积法超细金属管成型所获得成品性能影响，分析了所得成品的硬度，管厚均匀度和微观组织形貌。结果表明：单脉冲电流作为电源所获的样品壁厚均匀性、硬度均匀性与粗糙度的结果均好于直流电流作为电流。电流增大引起的电流密度增加会引起电沉积速度加快，从而在壁厚均匀性、硬度均匀性与粗糙度方面的性能变差。化学镀时长相对其它两项因素是影响程度较小的一项因素，但也对于表面粗糙度有着至关重要的影响，应当适当选取。电沉积金属管管壁的晶粒非常的小并且在一定电镀时间内的镀层不具有晶粒取向。加入搅拌可缓解由于溶液浓度的不均匀引起的电沉积性能变差。

关键词 电沉积 超细金属管 换热器工艺优化

毕业设计说明书外文摘要

Title Study of molding process of electrodeposition the ultrafine the ultrafine metal tube

Abstract：With the increase in the proportion of electronic products, heat problems are increasingly difficult to solve, a new generation of microchannel heat exchanger research is also faced with complex parts difficult to create the problem. Especially in which the ultra-fine metal tube as a heat exchange liquid channel uses a conventional process and does not achieve its accuracy. Metal tubular stents used in medical care also require new materials and more complex microstructures. The demand for fine structure metal pipes is more urgent than ever. Electrodeposition of ultrafine metal tube with its unique electrochemical method in the molding accuracy, mechanical properties and the number of products can be included in the number of details than the traditional plastic deformation process and cutting, extrusion and other processes. Therefore, it is of great theoretical and practical value to explore the development of a new micro-forming technology. The results show:

Single-pulse current as a result of the sample wall thickness uniformity, hardness uniformity and roughness results are better than the DC current as a current. An increase in the current density due to an increase in current causes an increase in the deposition rate, resulting in poor performance in uniform wall thickness uniformity, hardness uniformity and roughness.

Chemical plating time relative to the other two factors is a less influential factor, but also for the surface roughness has a crucial impact, should be properly selected.

The grain of the electrodeposited metal tube wall is very small and the coating within a certain plating time does not have a grain orientation.

The addition of stirring can alleviate the deterioration of the electrodeposition performance due to the unevenness of the solution concentration.

Keywords Electrodeposition, Ultrafine metal tube, microchannel heat exchanger

目次

1 绪论 1

1.1 超细金属管 1

1.2 超细金属管材电沉积成型工艺研究:http://www.chuibin.com/cailiao/lunwen_205121.html