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水轮机叶片长期在冲击,疲劳和弯曲等复杂受力情况下工作,而且铸造成型不可避免地存在着缺陷和裂纹。由于叶片长期在水下运转不能对其裂纹扩展进行监测,从而要求叶片用钢有较高的断裂韧性及抗裂纹扩展能力,严防意外的断裂事故。0Cr13Ni4Mo是近年来发展的大型水轮机叶片用钢。铸造和焊接性能,大截面力学性能和耐冲蚀性能优于过去使用的水轮机材料,而且在强度和韧性的配合上也有其他钢种不可比拟的优点。这是一种新型马氏体不锈钢。在处理到一定强度级别时,有很高的韧
Hydro-turbine blades work for a long time under complex stress conditions such as impact, fatigue and bending, and casting and casting inevitably have defects and cracks. Long-term operation of the blade in the water can not be monitored for its crack growth, thus requiring the blade steel with higher fracture toughness and crack propagation resistance, to prevent accidental fracture. 0Cr13Ni4Mo is a large-scale hydraulic turbine blade steel developed in recent years. Casting and welding performance, large-scale mechanical properties and erosion resistance is superior to the turbine materials used in the past, but also in the strength and toughness with the other steel incomparable advantages. This is a new type of martensitic stainless steel. In dealing with a certain level of intensity, there is a high toughness