一、前言 活塞环选用钨钒钛合金铸铁材质,由于用天然钒钛生铁为原料,在经济上合算,同时性能优越,耐磨性好,应用范围广,近年来受到国内活塞环制造厂家的重视,目前全国已有不少内燃机配件厂生产钨钒钛铸铁活塞环。虽然钨钒钛单体铸造活塞环毛坯制造工艺总的说来与传统的铬钼活塞环相差不大,但由于钒钛元素的作用,铸铁过冷倾向大,以及对金属炉料的特殊要求,往往工艺选择不当即产生大量废品。并且造成金相废品的因素是错综复杂的,这些因素相互制约,这 I. Introduction Piston ring made of tungsten vanadium titanium alloy cast iron material, the use of natural vanadium and titanium pig iron as raw material, cost-effective, superior performance, good wear resistance, wide range of applications, in recent years by the domestic piston ring manufacturer’s attention At present, many internal combustion engine parts factory production of tungsten vanadium titanium cast iron piston rings. Although tungsten vanadium and titanium single casting piston ring blank manufacturing process generally speaking with the traditional chrome molybdenum piston ring is not much difference, but due to the role of vanadium and titanium, cast iron overcooling tendency, and the special requirements of the metal charge, often Improper selection of technology that produces a lot of waste. And the factors that cause metallurgical waste are complex and these factors restrict each other