一、前言 高温下使用的金属材料结构部件如火力发电和原子能发电设备的压力容器,燃气轮机和喷气发动机的轴、盘、叶轮、叶片、榫齿等。经常承受运动—停止时的交变负荷和稳定运转时的静负荷同时交互作用,即同时受交变负荷引起的疲劳损伤和静负荷引起的蠕变损伤的交互作用。而引起高温部件的过早 I. INTRODUCTION Metallic structural components used at high temperatures, such as pressure vessels for thermal power generation and nuclear power generation equipment, shafts, disks, impellers, blades and tenons of gas turbines and jet engines. Often bear the movement - stop the alternating load and static load at steady operation at the same time the interaction, that is affected by both the alternating load fatigue damage and static load caused by the interaction of creep damage. Caused by high temperature components too early