摘要
为研究纳米TiC浓度和占空比对复合镀层的表面形貌、沉积速率和显微硬度的影响,用单脉冲复合电镀技术在Q235钢表面电沉积Ni-纳米TiC复合镀层,用扫描电子显微镜、倒置金相显微镜、X射线衍射仪和维氏显微硬度计分析,确定制备复合镀层的最佳工艺条件。结果表明:随着镀液中纳米TiC浓度和占空比的增加,复合镀层沉积速率和显微硬度均呈先上升后下降的趋势,当镀液中纳米TiC的质量浓度为8 g/L、占空比50%时,复合镀层中纳米TiC复合量最佳,此时,沉积速率为40.32×10-6m/h,显微硬度为360.8HV0.1,是基体硬度的2.5倍。最佳工艺条件下制备的复合镀层表面较致密,物相镀层由晶态的Ni和TiC相构成。
The Ni-nano-TiC composite coatings were deposited on the surface of Q235 steel by single-pulse composite electroplating.scanning electron microscopy,inverted metallographic microscope,X-ray diffractometer and Vickers microhardness tester were used to study the effects of nano-TiC concentration and duty ratio on surface morphology,deposition rate and microhardness of the composite coating.The optimum process conditions for preparing composite coatings were determined.The results show that the deposition rate and microhardness of the composite coating increase first and then decrease with the increase of nano-TiC concentration and duty ratio in the plating solution.When the concentration of nano-TiC in the plating solution is 8 g/L,and the duty ratio is at 50%,the composite amount of nano-TiC in the composite coating is the best.At this time,the deposition rate is40.32×10-6 m/h,and the microhardness is 360.8 HV0.1,which is 2.5 times of the hardness of the matrix.The surface of the composite coating prepared under the optimum process conditions is relatively dense,and the phase coating is composed of crystalline Ni and TiC phases.
作者
任鑫
吴双全
江仁康
窦春岳
REN Xin;WU Shuangquan;JIANG Renkang;DOU Chunyue(College of Materials Science and Engineering,Liaoning Technical University,Fuxin 123000,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2019年第5期74-77,共4页
Ordnance Material Science and Engineering
基金
辽宁省教育厅科学技术研究资助项目(LJYL007)
关键词
脉冲复合电镀
纳米TIC
工艺参数
沉积速率
显微硬度
pulse composite plating
nano-TiC
technology parameters
deposition rate
microhardness
作者简介
任鑫,男,博士,硕士生导师,教授;主要从事材料表面改性技术研究。E-mail:lnturen@163.com。
