活塞环是汽车发动机的关键部件之一,它的质量好坏直接影响主机性能和发动机的寿命。由于活塞环处在高速、高温、高压的恶劣条件下工作,就要有足够的强度,弹牲和硬度来承受多种交变应力和磨损。我国生产的活塞环,一般采用合金灰铸铁材料,其使用寿命很少有突破十万公里的。而国外的同类产品平 Piston ring is one of the key components of automobile engine, its quality directly affects the host performance and engine life. As the piston ring in high-speed, high temperature, high pressure work under harsh conditions, there should be sufficient strength, elasticity and hardness to withstand a variety of alternating stress and wear. China’s production of piston rings, generally used gray cast iron alloy material, its service life rarely exceeded one hundred thousand kilometers. And foreign similar products flat