文档介绍：全套资料,联系qq 695132052
河南科技学院
2009届本科毕业论文(设计)
论文题目:热处理温度和时间对镍-磷合金镀层硬度的影响(1)
学生姓名:支小娜
所在院系:机电学院
所学专业:机电技术教育
导师姓名:刘贯军
完成时间:2009年5 月 25日
摘要
本文论述了Ni-P合金化学镀的反应机理,采用酸性溶液化学镀镍-磷合金,研究了热处理温度和时间对镀层显微硬度的影响。通过在镀液中采用络合剂、稳定剂、促进剂等成分,得到了不同磷含量非晶态Ni-P镀层。运用显微硬度计、扫描电镜等现代分析工具,系统地测试和分析了Ni-P镀层的成分、组织结构及不同磷含量、不同热处理状态的化学镀Ni-P合金表面镀层,在50g载荷下的显微硬度。并通过均匀设计法对所测硬度进行优化。优化结果表明:在446℃, 显微硬度高达1066HV。
关键词:化学镀镍,磷含量,热处理,显微硬度
Influence of Temperature and Time on the Microhardness of electroless plating Ni-P Coating (1)
Abstract
In this paper, the reaction mechanisms of Ni-P alloy electroless plating have been expounded , was plated by process of acidic solution. Temperature and time influence of heat treatment on microhardness of thecoating was studied. In the electroless solution, plexing agent, stabilizer and accelerant are applied, and the concentration of phosphorus amorphous Ni-P coating is gained. position, microstructure, microhardness property of Ni-P electroless plating have been studied with the help of modern analytical instrument, such as the scan electron microscope, the photo electron spectroscopy, and so on. The electroless Ni-P coating’s hardness was measured by hardness tester with a max, loading capacity of 50g, and the coatings with various thickness had been treated by different heat treatments. It is indicated from the experiment that microhardness are obviously imp- roved after heated at 446℃ for , as well as the microhardness is 1066 HV.
Keywords:electroless plating Ni,concentration of phosphorus,heat –treatment,microhardness
目录
1 绪论 1
化学镀镍技术概况 2
化学镀镍的特点 2
化学镀Ni-P合金机理 2
2 实验材料和研究方法 3
试验材料和实验装置 3
基本工艺流程 3
试样前处理 3
预磨试样 3
清洗 4
除油 4
除锈 4
镀液成分及配制方法 4
施镀 6
镀件后处理 6
镀层性能测试方法 7
镀层显微硬度测试 7
镀层的热处理测试 7
3 试验结果及分析 7
化学工艺因素的影响 7
温度的影响 7
pH值的影响 7
其他因素的影响 8
磷含量对镀层显微硬度的影响 8
热处理对镀层显微硬度的影响 12
热处理温度对镀层显微硬度的影响 12
热处理时间对镀层显微硬度的影响 13
4 结论