In order to improve the tribological properties of an engine piston ring and enhance\nits service life, magnetron sputtering technology and low temperature ion sulphurizing treatment\ntechnology were used to prepare CrMoN/MoS2 solid lubricant coating on the surface of an engine\npiston ring. The morphologies and compositions of the surface and cross-section of the sulfuration\nlayer were analyzed by field emission scanning electron microscopy (FESEM), and wear property\nunder high load, high speed and high temperature conditions were tested by a SRV�®4 friction and\nwear testing machine. The results show that the CrMoN/MoS2 composite coatings appear as a dense\ngrain structure, and the coating is an ideal solid lubrication layer that possesses an excellent high\ntemperature wear resistance, reducing the engine operating temperature abrasion effectively and\nprolonging the service life of the engine.
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