| WANG Huipeng,SHA Shurun,GUO Weiling,ZHOU Longlong,XING Zhiguo,WANG Haidou.Research Progress in Preparation of Magnetic Field Assisted Metal Coatings[J],54(11):1-16 |
| Research Progress in Preparation of Magnetic Field Assisted Metal Coatings |
| Received:November 25, 2024 Revised:February 27, 2025 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2025.11.001 |
| KeyWord:magnetic field metal craft coating preparation microstructure coating property |
| Author | Institution |
| WANG Huipeng |
School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Jiangxi Ganzhou , China |
| SHA Shurun |
School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Jiangxi Ganzhou , China |
| GUO Weiling |
National Key Laboratory for Remanufacturing,Beijing , China |
| ZHOU Longlong |
Institute of Tribology, Southwest Jiaotong University, Chengdu , China |
| XING Zhiguo |
National Key Laboratory for Remanufacturing,Beijing , China |
| WANG Haidou |
National Engineering Research Center for Remanufacturing, Army Academy of Armored Forces, Beijing , China |
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| Abstract: |
| The serviceability of the coating is increasingly demanded in large machinery and precision parts. However, defects such as pores will inevitably occur during the preparation of the coating. Magnetic field can inhibit the formation of defects in the process of coating preparation and improve the microstructure inside the coating, thus extending its service life. Magnetic field assisted preparation of metal coatings has important research value. Nevertheless, there is still a lack of systematic reviews in related fields. Firstly, the effects of magnetic field assisted laser cladding, magnetic field assisted thermal spraying and magnetic field assisted electrodeposition on defects of formed coatings are reviewed. Due to the different forming methods of coatings, the magnetic field can reduce the formation of coating defects by promoting the flow of the molten pool, affecting the flight morphology of coating droplet particles, affecting particle deposition and catalyzing hydrogen evolution. Secondly, the improvement of coating microstructure by magnetic field parameters such as magnetic field type, magnetic field direction and magnetic field strength is described. Different magnetic field types, such as stable magnetic field (SMF), alternating magnetic field (AMF), pulsed magnetic field (PMF), have different effects on the alleviation of coating defects, grains and other microstructure. Generally, SMF has a better inhibition on coating defects, PMF has a better effect on grain refinement, and the strengthening effect of AMF is between SMF and PMF. When the magnetic field direction is perpendicular to the particle deposition direction, the auxiliary effect is the best. When the magnetic field direction is perpendicular to the particle deposition direction, the auxiliary effect on the coating is the best. Suitable magnetic field intensity can greatly improve the fine grain and homogenize the hard particles. Finally, the enhancement effect of the magnetic field on mechanical properties and serviceability of the coating is summarized, and the possible development direction of the magnetic field in the field of coating strengthening in the future is prospected. The magnetic field can improve the mechanical properties of the coating such as the average microhardness and bonding strength, while reducing the wear loss and corrosion current density, so as to improve the wear resistance and corrosion resistance of the coating. Compared with the non-magnetic field environment, both the microhardness and the bonding strength of the magnetic field assisted preparation coating can be increased. The magnetic field can increase the hardness and elastic modulus of the coating at the same time, thus reducing the wear depth and wear loss during the wear process. The reduction of coating defects and the improvement of microstructure can reduce the current density of the coating and increase the corrosion potential, so that the corrosion resistance of the coating can be improved. The current research status of magnetic field assisted preparation of the metal coating is summarized, which is helpful to further understand the mechanism of magnetic field influence on metal coating forming. This will provide a basis for the subsequent development of the field of magnetic field enhanced coating properties, thereby promoting the application of magnetic field technology in other industrial preparation fields. |
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