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通常用13％铬不锈钢制造汽轮机叶片,但从叶片工作状态分析并不是非用不锈钢不可,不同区间可以使用不同材料。叶片要求材料具有一定的机械性能,包括强度、塑性和韧性。强度的大小取决于叶片的工作应力和安全系数,工作温度不超过400℃的叶片以常温和高温短时拉伸强度为主,工作温度超过400℃的叶片要求材料具有一定的持久强度。无论是常温拉伸强度、高温短时拉伸强度还是持久强度,许多低合金钢都不比13％铬钢低,同样,塑性和韧
Steam turbine blades are usually made of 13% chromium stainless steel, but the working conditions of the blades are not non-stainless steel. Different sections can use different materials. Blades require that the material have certain mechanical properties, including strength, ductility and toughness. The strength of the blade depends on the working stress and safety factor of the blade. The blades whose operating temperature does not exceed 400 ° C are mainly short-time tensile strength at normal temperature and high temperature. The blades whose operating temperature exceeds 400 ° C require certain long-lasting strength. No matter what is room temperature tensile strength, high temperature short-term tensile strength or long-lasting strength, many low-alloyed steels are no lower than 13% chromium steels. Likewise, ductility and toughness