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Recently, the State Intellectual Property Office issued a new batch of patent announcements, and the “Chromium-based diamond composite chrome-plated piston ring and its processing method†declared by Yizheng Shuanghuan was awarded the national invention patent, and was awarded “with non-stick coatingâ€. Four piston ring product utility model patents such as piston ring and piston ring with solid lubricating coating. The chrome-based diamond composite chrome-plated piston ring can withstand large thermal and mechanical loads, even if the piston ring and the oil film on the cylinder wall are in a boundary state, the “cylinder†will not occur; at the same time, due to the high hardness and lubrication embedded Good diamond particles, wear resistance and tensile cylinder performance have also been greatly improved to meet the requirements of modern high performance engines. At present, the piston ring of internal combustion engine is widely used for surface strengthening by hard chrome plating. However, in the case of poor lubrication or high thermal load, the friction between the hard chrome-plated piston ring and the cylinder wall is deteriorated, and the welding wear is prone to occur. The cylinder or chrome layer peels off and is insufficient to meet the requirements of high power, long life and low emissions of the internal combustion engine. Even if a composite plating process is employed, the chromium layer is deposited by diamond particles to form a composite layer. Due to the large amount of hydrogen in the chrome plating, the content of diamond particles in the composite layer is extremely low, generally not more than 1%, and since the diamond particles are interposed between the chromium crystal grains, the plating layer is liable to generate large brittleness, which is liable to cause force to fall off. To this end, Yizheng Shuanghuan technicians independently developed a “chrome-based diamond composite chrome-plated piston ring and its processing methodâ€. By using this method, the diamond particle content is as high as 0.5-5.0% and the diamond particles are distributed on the original network and pores of the chromium layer, and the chromium-based diamond composite coating is solved, which solves the technical problems encountered in the prior processing. It is reported that the technology has been successfully applied to the market and mass production has been realized by automated production lines.