Fundamental investigation on nano-precision surface finishing of electroless Ni–P-plated STAVAX steel using magnetic compound fluid slurry |
| |
| Affiliation: | 1. Graduate School of Akita Prefectural University, 84-4 Aza Ebinokuchi Tsuchiya, Yurihonjo, Akita 015-0055, Japan;2. Dept. of Machine Intelligence and Systems Engineering, Akita Prefectural University, 84-4 Aza Ebinokuchi Tsuchiya, Yurihonjo, Akita 015-0055, Japan;1. Department of Mechanical Engineering, Osmania University, India;2. Department of Mechanical Engineering, Indian Institute of Technology Delhi, India;1. University Visvesvaraya College of Engineering, Bangalore University, Bangalore, 560001, India;2. Surface Engineering Division, CSIR National Aerospace Laboratories, Bangalore 560017, Karnataka, India.;3. Advanced Composites Division, CSIR National Aerospace Laboratories, Bangalore 560017, Karnataka, India.;4. University Visvesvaraya College of Engineering, Bangalore University, Bangalore, 560001, India.;1. Institute of Advanced Manufacturing Technology, School of Mechanical Engineering, Dalian University of Technology, No. 2 Linggong Rd, Dalian, 116024, PR China;2. Department of Chemistry and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 422 Siming South Road, Xiamen, 361005, PR China;1. Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material, Hunan University of Science and Technology, Xiangtan 411201, PR China;2. Ultraprecision Machining Center, Zhejiang University of Technology, Hangzhou 310014, PR China;3. National Engineering Research Center for High Efficiency Grinding, Hunan University, Changsha 410082, PR China;1. Bilkent University, Department of Mechanical Engineering, Ankara 06800, Turkey;2. Bilkent University, Department of Industrial Engineering, Ankara 06800, Turkey |
| |
| Abstract: | Electroless nickel–phosphorus (Ni–P) plating used in a range of hot embossing metal molds/dies and injection metal molds/dies must be manufactured to nano-precision roughness for proper operation of the molds/dies. We therefore developed a novel polishing technique for mirror surface finishing of this kind of magnetic material using a magnetic compound fluid (MCF) slurry. The effects of the magnetic and gravitational forces acting on the carbonyl iron particles (CIPs) and abrasive particles (APs) within the MCF slurry were studied first, and the behaviors of the CIPs and APs in the presence of an external magnetic field were predicted. Then, experiments were performed to confirm the predictions by investigating the distribution of the CIPs and APs on the working surface of the MCF slurry. Finally, four MCF slurries containing CIPs and APs with different diameters were employed to finish the Ni–P-plated STAVAX steel specimen at different working gaps. The results revealed that for the magnetic workpiece, the resultant vertical force attracted CIPs towards the work surface, whereas APs were pushed away from the work surface. However, the CIPs and APs showed opposite behaviors with the non-magnetic workpiece. The percentage of APs distributed on the working surface increased and the distribution became more even as either the diameter of the CIPs or the working gap increased, whereas that of CIPs had the opposite tendency. The MCF slurry containing bigger CIPs and smaller APs should be employed and the working gap should be set at a smaller value in order to perform mirror surface finishing of a magnetic Ni–P-plated surface. Under the experimental conditions in this work, the Ni–P-plated surface quality improved significantly, and a mirror surface roughness (Ra) of 4 nm was successfully achieved without leaving scratches or particle adhesion when using an MCF slurry containing CIPs 7 μm in diameter and APs 1 μm in diameter, showing that MCF slurries containing commercial CIPs are applicable to the nano-precision finishing of magnetic materials. |
| |
| Keywords: | Magnetic compound fluid Magnetic Polishing Surface roughness Plating |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
