Piston ring heat treatment process: with the development of modern engine in the direction of high speed, high load and low emission, the material of piston ring is required to be higher and higher, and the surface treatment is also required to be changed. The technology of aging, tempering, gas nitridation, ion nitridation and ceramic infiltration of piston ring material is more and more widely used.
   Piston ring is one of the core components of the engine, its main role in the engine is sealing, heat transfer, oil control lubrication and support, therefore, the piston ring material should have the appropriate strength, hardness, elasticity and anti-fatigue performance. Excellent wear resistance. Heat resistance and corrosion resistance. With the development of modern engine in the direction of high speed, high load and low emission, the material of piston ring is required to be higher and higher, and the surface treatment is also put forward higher and higher. More and more new heat treatment technologies have been or are being applied to the heat treatment of piston rings, such as ion nitriding, surface infiltration, nanotechnology and so on.