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一、前言 柴油机废气增压器的出现,为柴油机提高单机功率提供了一条重要的途径。根据资料介绍,柴油机带增压后,其功率可提高50～100％以上;增压器的制造成本仅为柴油机的1/10左右,符合多、快、好、省的精神。六十年代以来,国内外都正在迅速地设计、制造和应用废气增压技术。 增压器中的涡轮叶轮是增压器的一个关键部件,其形状复杂,处在高温和高速旋转的条件下工作,对所用的金属材料在机械性能及工艺性能上都有很高的要求。在600～
I. Introduction The advent of diesel exhaust turbocharger provides an important way for diesel engine to improve stand-alone power. According to the information, the diesel engine with supercharger, its power can be increased by 50 ~ 100%; supercharger manufacturing costs only 1/10 or so of the diesel engine, in line with more, faster, better, the spirit of the province. Since the 1960s, both domestic and foreign markets are rapidly designing, manufacturing and applying exhaust gas pressurization technologies. Turbine turbocharger turbocharger turbocharger is a key component, its complex shape, in high temperature and high speed rotation of the work conditions, the use of metal materials in the mechanical properties and process performance have high requirements. At 600 ~