回转体类零件表面喷射电沉积Ni-P-ZrO2镀层的工艺研究

为保护在恶劣工作环境下工作的回转体零件,提高其表面显微硬度是一个有效的保护手段。针对回转体类零件表面Ni-P-ZrO_2镀层的显微硬度进行多变量工艺参数研究。采用JMP软件对喷射电沉积加工工艺进行试验研究,探究了电流、镀液温度、阴极回转速度以及镀液流速对显微硬度的影响,通过预测刻画器可得出镀层显微硬度最大值为756.56 HV,对应的最佳工艺参数为电流0.4 A,镀液流速3.91 m/s,阴极转速6.32 r/min,镀液温度60.93℃,该参数下制得的镀层硬度为737.74 HV,且镀层表面结构致密光滑,镀层质量优良,可为回转体类零件的镀层制备提供参考。

Process of Jet-Electrodeposited Ni-P-ZrO_2 Coating on Rotary Body Parts

In order to protect the rotating body parts which work under terrible circumstances,improving the micro-hardness of the coating on the rotating body parts is an effective mean. In this paper,the multi-variable process parameters were studied on the micro-hardness of the coating on the surface of the rotating body parts. JMP software was used to study the jet-electrodeposition process. The effects of current,bath temperature,cathode rotation speed,and flow rate of the bath on micro-hardness were explored. Results showed that the maximum micro-hardness of the obtained coating was 756.56 HV by prediction profiler and the corresponding process parameters were as follows: current 0.4 A,bath flow rate 3.91 m/s,cathode speed 6. 32 r/min,bath temperature 60. 93 ℃. Finally,the hardness of the coating prepared under these parameters was 737.74 HV,and the surface structure of the coating was dense and smooth,meaning the coating quality was also excellent. The study provided an effective reference for the preparation of coatings for rotating parts.