Microstructure and Tribological Properties of Ni-Co/SiC Coatings Prepared by Occlusion Electroplating for Grinding Tools

Abstract:

In order to improve the grinding performance and service life of electroplating composite coatings with high percent of hard abrasives, the composite coatings of Ni-Co/SiC were prepared by occlusion electroplating technology and their microstructure and tribological properties were studied. The research results show that the cathodal electric-current density in occlusion electroplating process and the SiC abrasive size have great influence on microstructure and tribological properties of Ni-Co/SiC coatings. The optimum value of cathodal electric-current density is 1 A/dm2 and the proper SiC abrasive size is about 20 μm, in which the Ni-Co/SiC coatings have excellent wear resistance and high grinding ability. The main wear mechanisms of Ni-Co/SiC coatings are micro-cutting and adhesive wear of matrix alloy, and micro-cracking wear and spalling of SiC abrasives.

• Periodical: Applied Mechanics and Materials (Volumes 34-35)
• Pages: 1457-1461
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.34-35.1457
• Online since: October 2010
• Authors: Ye Fa Tan, Bin Cai, Yi Qiang Tu, Ting Xu, Hua Tan, Chun Hua Zhou
• Keywords: Composite Coating, Grinding Tool, Occlusion Electroplating, SiC Abrasive, Tribology

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