引信低粗糙度零件化学镀镍工艺技术研究

【作者】 雷艳丽；

【导师】 马少杰； 安文权；

【作者基本信息】 南京理工大学 ， 兵器工程， 2008， 硕士

【摘要】 由于军品订货量的剧增,新产品层出不穷,新工艺的大量应用,对产品质量要求加严。在此过程中,低粗糙度零件不断表现出新的质量问题,例如:起皮、起泡等。其直接影响到产品的质量,为此企业付出了高昂的代价。低粗糙度零件工艺技术研究,首先,从化学镀镍反应的热力学、动力学原理,及零件材质的分析,对低粗糙度零件选择合适的表面处理镀前处理工艺,即除油(碱液除油、电化学除油)工艺、光亮酸洗工艺等,确定合理的镀前处理工艺流程;其次,根据产品零件粗糙度的要求,进行零件表面的粗化处理,以提高镀层与基体金属的结合力,并防止镀层出现针孔现象;最后,根据黄铜零件的热膨胀系数与化学镀镍层的热膨胀系数不同,选择了预镀铜工艺,增加了过渡层,防止镀后零件在加热处理和在装配现场出现起皮现象。同时将此次的工艺技术应用于生产实际,对经此工艺进行化学镀镍处理后零件进行了结合力测试、耐化学腐蚀性测试、耐色变性测试和孔隙率测试等性能试验,测试镍层各种性能均符合产品要求。通过试验解决了低粗糙度零件化学镀镍层结合力差的问题,及在化学镀镍过程中出现的镀层起泡和针孔等各种技术问题,给以后化学镀镍的推广使用提供了参考。更多还原

【Abstract】 Due to the rapid increase in military orders, an endless stream of new products, so that a large number of applications of new technology, product quality and strict demands. In the process, low roughness parts continue to demonstrate the quality of new issues, such as: skin effect, such as foaming. Its direct impact on the quality of products, this business has paid a high price. Low roughness parts The technology, first of all, from the chemical reaction of nickel thermodynamics, dynamics, materials, parts and components analysis of low roughness parts to choose a suitable surface treatment before the plating process, that is, oil (oil lye, Apart from the electrochemical) technology, light pickling process and the rough treatment, and other technology to determine a reasonable pre-plating process; Secondly, according to the roughness of the requirements of the product parts, parts of the rough surface treatment to enhance the bonding, coating to prevent the emergence of the phenomenon of pinhole; Finally, in accordance with brass parts of the coefficient of thermal expansion and chemical nickel coating of thermal expansion coefficient of different choices Pre-process the copper, an increase of transition layer to prevent post-plating parts in the assembly and heat treatment at the scene appeared from the phenomenon of skin. And the technology used in the production and use in the process of the low roughness parts for the chemical processing of nickel-plated, after parts of the chemical nickel coating for the bonding tests, corrosion-resistant chemical testing , The mere mention of resistance testing and porosity testing performance test, test a variety of nickel-performance products that are in line with the request.Through the test solution to the low roughness parts in the chemical nickel coating process of blistering and pinhole and other technical problems, and the chemical nickel coating bonding poor, after the chemical to promote the use of nickel plating to provide a reference .更多还原