占空比及脉冲频率对镀镍层质量影响实验研究
发布时间：2018-07-21 11:48
【摘要】：目前单层CBN砂轮成为超高速窄深槽加工的首选,针对目前电镀法制备CBN工具存在的镀层与基体结合强度差、镀层质量难以控制等的问题,对45#钢基体试件进行了电镀镍实验。运用脉冲电镀方法,制备了单金属镍层。研究了脉冲电源占空比对镀层孔隙率的影响及电源脉冲频率对镀层表层质量的影响,获得最优组合条件下的电镀镀层结构及形貌。实验结果表明:当脉冲电源占空比为20%、脉冲频率为0.5k Hz时,获得的镀层具有较低的孔隙率、晶粒细致的结构及形貌。
[Abstract]:At present, single layer CBN grinding wheel is the first choice in ultra-high speed narrow deep grooves processing. In view of the problems of poor bonding strength between coating and substrate and difficult control of coating quality, the nickel electroplating experiments were carried out on 4 steel substrate specimens. Single metal nickel layer was prepared by pulse electroplating. The effect of duty cycle ratio of pulse power on the porosity of the coating and the influence of pulse frequency on the surface quality of the coating were studied. The structure and morphology of the electroplating coating were obtained under the optimal combination condition. The experimental results show that when the duty cycle is 20 and the pulse frequency is 0.5 kHz, the coating has low porosity, fine grain structure and morphology.
【作者单位】： 太原理工大学机械工程学院精密加工山西省重点实验室;
【基金】：国家自然科学基金资助项目(51575375) 山西省自然科学基金资助项目(02050238)
【分类号】：TQ153.12
本文编号：2135425
[Abstract]:At present, single layer CBN grinding wheel is the first choice in ultra-high speed narrow deep grooves processing. In view of the problems of poor bonding strength between coating and substrate and difficult control of coating quality, the nickel electroplating experiments were carried out on 4 steel substrate specimens. Single metal nickel layer was prepared by pulse electroplating. The effect of duty cycle ratio of pulse power on the porosity of the coating and the influence of pulse frequency on the surface quality of the coating were studied. The structure and morphology of the electroplating coating were obtained under the optimal combination condition. The experimental results show that when the duty cycle is 20 and the pulse frequency is 0.5 kHz, the coating has low porosity, fine grain structure and morphology.
【作者单位】： 太原理工大学机械工程学院精密加工山西省重点实验室;
【基金】：国家自然科学基金资助项目(51575375) 山西省自然科学基金资助项目(02050238)
【分类号】：TQ153.12
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