Electrospark deposition in remanufacturing engineering, prospect of development and application

Abstract

Еlectro Spark Deposition (ESD) technology is widely used in the preparation of surface coating of parts remanufacturing and repair. It has been used widely in many industrial areas. The surfaces of mechanical parts are strengthened to improve properties by ESD technology. The article introduced firstly the development history and various terms of the ESD technology. Secondly, it was shown that the working principle of ESD and the work process of ESD. With the development process of ESD deposition equipment, three types of vibrating electrodes were figured. Thirdly, the characteristics of ESD were summarized. Then it introduced the latest research progress of ESD technology on the hotspots of research and new fields of application. Discoveries and new theories in materials provide greater scope for exploration in ESD research. For example, fusion coating of amorphous structure and in-situ reaction in the cemented carbide, multi-layer composite process and multiple materials composite coating, high entropy alloy, nanostructure coating, and biological coating. Researchers had optimized the machining process to improve the surface quality of ESD. At present, the research hotspots are in the ESD of the subsequent treatment process and the study of the composite process. These researches provide new ideas for ESD automation processing to obtain better surface quality. Finally, the paper addressed the current problems of ESD technology and provided an outlook on the research direction and future development of ESD technology.