一、前言1Cr11Ni2W2MoV 钢是在12%Cr 钢的基础上加入 W、Mo、V 等合金元素而发展起来的一种马氏体型热稳定不锈钢。由于这种钢具有良好的抗腐蚀性能,又能通过热处理获得高的力学性能,因而被广泛地用来制做航空发动机的压气机叶片、盘及涡轮轴等重要承力零件。该钢在我国航空工业中使用时间较长,暴露出来的主要问题有:①钢的成分在规定范围内变动,冲击值波动幅度大,高者可达20～30kg· First, the preface 1Cr11Ni2W2MoV steel is a martensitic heat-stable stainless steel developed by adding W, Mo, V and other alloying elements on the basis of 12% Cr steel. Because of its good corrosion resistance and its high mechanical properties by heat treatment, this steel is widely used to make important load-bearing parts for aeroengines such as compressor blades, disks and turbine shafts. The steel used in China’s aviation industry for a long time, exposed the main problems are: ① changes in the composition of the steel within the scope of the impact value fluctuations, the high up to 20 ~ 30kg ·