目前,作为活塞环材料的灰铸铁仍占主导地位。为了延长活塞环的使用寿命,人们对它的耐磨性能已进行了多年的研究,取得了良好的效果。作为自张式的活塞环必须具有较高的弹性模数,这一点却没有得到应有的重视,很大程度上是由于原国标规定了弹性模数与抗弯强度之比小于某一定值,弹性模数低一点反能满足,一般为8500～9500 Currently, gray cast iron, which is the material of piston rings, still dominates. In order to extend the service life of piston rings, people have carried out many years of research on its wear resistance and achieved good results. As a self-Zhang Piston ring must have a high modulus of elasticity, which has not been given due attention, largely due to the original national standard provides a modulus of elasticity and bending strength ratio is less than a certain value, Lower elastic modulus to meet the anti-lower, generally 8500 ~ 9500