低碳马氏体型不锈钢有极其良好的机械性能,有良好的耐蚀性和耐气蚀性,而且有令人满意的可焊性。因此,这种钢用于生产要求很严格的水轮机和动力设备的零件。然而,铸件生产的发展,在很大的程度上受到熔炼冶金工程、热处理和铸造工艺领域中一系列问题的限制,这些问题迄今没有一致的解决方法。其中的一个问题就是分析铝对这种钢的缺口韧性的影响和对缺口韧性试验后断面形态变化的影响。 Low-carbon martensitic stainless steel has extremely good mechanical properties, good corrosion resistance and cavitation resistance, and has satisfactory weldability. Therefore, this kind of steel is used for the production of the most demanding parts of turbine and power equipment. However, the development of casting production is limited to a large extent by a series of problems in the field of smelting metallurgy, heat treatment and casting processes to date, and so far there has been no consistent solution to these problems. One of the problems is to analyze the effect of aluminum on the notch toughness of this steel and the effect on the cross-sectional morphology change after the notch toughness test.