4 results about "Electrospark deposition" patented technology

The application discloses a device and method for discharging additive and subtractive materials by planetary electrodes, and relates to the technical field of electric spark deposition, which comprises a shell, a bottom end of a stirring head in a semispherical shape, a feeding cavity arranged in the stirring head, a feeding port arranged at a bottom of a side wall of the stirring head, a feeding pipe arranged at a top end of the stirring head, a first driving mechanism for driving the stirring head to rotate, the stirring head penetrating through a planetary carrier, a gap being arranged between the planetary carrier and the stirring head, an axis of the stirring head being parallel to or coinciding with an axis of the planetary carrier, the planetary carrier being arranged in the shell and being rotationally matched with the shell through a bearing, a gas feeding cavity being arranged in the planetary carrier, an air filling pipe being arranged at a top end of the planetary carrier, a second driving mechanism for driving the planetary carrier to rotate, a plurality of rotary motors being fixedly connected with the planetary carrier, a gas feeding channel and a gas outlet being arranged in each rotary electrode, and an electrode ring being fixedly arranged on an inner wall of the shell. The application can improve the compactness of a coating.

This invention relates to the field of additive manufacturing technology and discloses a fine-grained, low-stress electrical discharge-laser-ultrasound composite additive manufacturing method. The method comprises the following steps: performing electrical discharge deposition-laser remelting-ultrasound impact cyclic additive manufacturing on a metal substrate surface to obtain the additively manufactured component. The additively manufactured component prepared by this method exhibits a compressive stress state on its surface, which is beneficial for suppressing fatigue crack initiation and propagation, significantly improving the fatigue life and service reliability of the component. Furthermore, the additively manufactured component prepared by this method possesses significant fine-grained microstructure characteristics and achieves a synergistic improvement in strength, plasticity, and toughness.

The application belongs to the technical field of surface engineering, and discloses a preparation method of an electric spark deposition titanium carbide wear-resistant coating of an agricultural machinery wearing part and the coating. The method comprises the following steps: under the protection of argon, titanium carbide is used as an electrode to perform electric spark deposition on the surface of a base body which has been polished and cleaned, so as to obtain a titanium carbide coating. The titanium carbide coating has a small friction coefficient, high wear resistance and a certain thickness.

This invention relates to a composite self-lubricating coating for low- and medium-carbon steel materials and its preparation method. The coating comprises a wear-resistant deposited layer on the surface of the low- and medium-carbon steel material and a self-lubricating layer sprayed onto the surface of the deposited layer. The wear-resistant deposited layer is a tungsten carbide deposited layer, and the self-lubricating layer is a molybdenum disulfide self-lubricating layer. A scaly tungsten carbide deposited layer is formed on the surface of the low- and medium-carbon steel material using electrical discharge deposition (EDD) technology. Then, molybdenum disulfide is sprayed onto the tungsten carbide deposited layer using a spraying technique to form the self-lubricating layer. After baking and cooling, the composite self-lubricating layer is formed. The combination of tungsten carbide and molybdenum disulfide significantly improves the wear resistance and hardness of the material, especially in applications under abrasive wear environments, effectively extending the service life of the workpiece. Furthermore, the process provided by this invention is simple, easy to operate, has low equipment costs, and is easily achievable for large-scale mass production.