金属密封环系浮动油封中关键零件,它的质量直接影响到浮动油封的使用寿命。由于金属密封环不仅要在水和泥砂的介质中保护轴承,同时要承受刀具破碎岩石时的作用力、冲击和振动,这就要求金属密封环具备较高的强度、韧性、硬度和耐磨性。目前,国内有关单位做了大量的试验研究工作,曾先后用过不同牌号钢制密封环经不同的表面处理,发展到现在已采用失腊铸造、陶 Metal seal ring is a key part of the floating seal, its quality directly affects the life of the floating seal. Because the metal seal ring not only protects the bearing in the medium of water and silt, but also withstand the force, impact and vibration when the tool breaks the rock, it requires the metal seal ring to have high strength, toughness, hardness and wear resistance . At present, the relevant domestic units have done a lot of experimental work, has used different grades of steel seal ring by different surface treatment, the development has now adopted the Lost wax casting, pottery