RU94014489A - METHOD OF ELECTRICAL SPREADING COATING - Google Patents

Claims (1)

The alleged invention relates to electrospark methods for the processing of metallic materials and can be used to improve the wear resistance and corrosion resistance of machine parts and tools. The proposed method is based on the deformation of a layer applied by an electric spark method in a plastic state. The process is carried out by smoothing the layer with a rotating smooth disk with radial grooves for the electric-spark electrode. In this case, the reciprocating motion of the electrode relative to the workpiece is synchronized with the frequency of movement of the disk slots. The proposed method allows you to deform the layer in a plastic state, depending on the speed of rotation and vibration frequency of the electrode, and to obtain through the process of smoothing homogeneous dense coatings with low roughness. In the process, you can also use high-current modes due to the additional heat removal by means of a disk and, as a consequence, to obtain thicker dense coatings of increased hardness and to exclude thermal tempering of the heat-treated metal. Due to the use of plastic deformation, a low static force on the surface to be treated makes it possible to apply the method for applying coatings to fine and small parts and tools (for example, medical ones). The use of the proposed method in a modern environment in various areas of industry will significantly increase the service life of machine parts and tools with great economic effect. Thus, the use of the proposed method of applying coatings on medical instruments provides an increase in corrosion resistance under conditions of sterilization and their operation in aggressive media. The service life of medical instruments is increased by 1.5 - 2 times.