目前,随着发动机的日益强化,发动机的工作温度也不断提高。使在高温区工作的某些零、部件,如气缸盖、气缸套、活塞、燃烧室以及涡轮叶片等,受到新的挑战。由于材料的高温强度不够,这些零、部件往往不能承受过高的机械负荷和热负荷,时有损坏现象。这些情况严重地阻碍着发动机性能的进一步提高。 At present, as the engine is increasingly strengthened, the working temperature of the engine is also continuously increased. Some of the zero, parts, such as cylinder heads, cylinder liners, pistons, combustion chambers and turbine blades that work in high temperature areas are under new challenges. Due to the high temperature strength of the material is not enough, these parts are often not able to withstand excessive mechanical and thermal load, when the phenomenon of damage. These conditions seriously hinder the further improvement of engine performance.