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前言随着工业的发展发,电用的汽轮机的容量迅速地和不断地向大型化发展,蒸气采用中间再热,各项技术经济指标要求降低。具有决定性的因素在于提高机组的进气温度和压力,目前由于受到金属材料在高温长期工作下强度的不足(含合金元素少工艺性能好的钢)限制了机组参数的进一步地提高。无论国内外汽轮机制造业中,工作温度降低于450℃时广泛采用1Cr13,2Cr13,铬不锈钢作叶片,材料温度在520℃左右选用Cr11MoV或类
Preface With the development of industry, the capacity of steam turbines used for electricity is rapidly and continuously developing towards large-scale. The steam is reheated in the middle and the technical and economic indexes are required to be reduced. The decisive factor is to increase the inlet air temperature and pressure of the unit. At present, due to the lack of strength of the metal material under long-term operation at high temperature (including low-alloyed steel with good technological properties), the further improvement of the unit parameters is limited. Regardless of the steam turbine manufacturing industry both at home and abroad, 1Cr13 and 2Cr13 are widely used when the operating temperature is lowered below 450 ° C, and the blades are made of chrome stainless steel. The temperature of the material is about 520 ° C. Cr11MoV or the like