一、前言随着生产发展需要,我厂今后的主导产品将是30万千瓦及更大功率的汽轮机。作为机组关键部件的动叶片,要求进一步提高产品质量,以保证机组的安全运行。由于叶片处于汽相或二相汽流和高速交变应力状况下工作,需要进行叶片振动疲劳强度的研究和测试,还要求提供具有较高的疲劳性能的材质和工艺。对于镀铬、高频淬火、镶焊硬质 I. Preface With the development of production and demand, the leading products of our factory in the future will be 300MW and more powerful steam turbines. As the key components of the rotor blades, requiring further improvement of product quality, to ensure the safe operation of the unit. Because the blade is working under vapor phase or two phase flow and high speed alternating stress conditions, research and testing of blade fatigue strength are required and materials and processes with higher fatigue properties are also required. For chrome-plated, high-frequency quenching, inlaid with hard