Gui Yanghai, Zhao Jianbo, Chen Jingbo, Jiang Yuanli
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China.
Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Zhengzhou University of Light Industry, Zhengzhou 450002, China.
Materials (Basel). 2016 Mar 4;9(3):153. doi: 10.3390/ma9030153.
Cubic boron nitride (cBN) is widely applied in cutting and grinding tools. cBN grains plated by pure Ni and Ni/SiC composite were produced under the same conditions from an additive-free nickel Watts type bath. The processed electroplating products were characterized by the techniques of scanning electron microscopy (SEM), X-ray diffraction (XRD) and thermoanalysis (TG-DTA). Due to the presence of SiC particles, there are some additional nodules on the surface of Ni/SiC plated cBN compared with the pure Ni plated cBN. The unique morphology of Ni/SiC plated cBN should attain greater retention force in resin bond. Moreover, the coating weight of cBN grains could be controlled by regulating the plating time. cBN grains with 60% coating weight possess the optimum grinding performance due to their roughest and spiniest surface. In addition, Ni spines plated cBN grains show good thermal stability when temperature is lower than 464 °C. Therefore, the plated cBN grains are more stable and suitable for making resin bond abrasive tools below 225 °C. Finally, the formation mechanism of electroplating products is also discussed.
立方氮化硼（cBN）广泛应用于切削和磨削工具。在相同条件下，采用无添加剂的瓦特型镀镍槽制备了纯镍和镍/碳化硅复合材料镀覆的cBN颗粒。通过扫描电子显微镜（SEM）、X射线衍射（XRD）和热分析（TG-DTA）技术对加工后的电镀产品进行了表征。由于碳化硅颗粒的存在，与纯镍镀覆的cBN相比，镍/碳化硅镀覆的cBN表面有一些额外的瘤状物。镍/碳化硅镀覆的cBN独特的形态在树脂结合剂中应具有更大的保持力。此外，通过调节电镀时间可以控制cBN颗粒的镀覆重量。镀覆重量为60%的cBN颗粒由于其表面最粗糙且有刺状突起，具有最佳的磨削性能。此外，镀镍刺的cBN颗粒在温度低于464℃时表现出良好的热稳定性。因此，镀覆的cBN颗粒更稳定，适合在225℃以下制作树脂结合剂磨具。最后，还讨论了电镀产品的形成机理。
