根据某机Ⅰ级涡轮盘外场使用的调查和进行的分析、测量、试验 ,找出了该盘篦齿裂纹产生与扩展的主要原因 ,并得出了如下结论 :如果能控制该盘篦齿处工作温度不超过 738℃ ,则篦齿尖是很难萌生径向裂纹的 ;即使在篦齿尖萌生了径向裂纹 ,在 80 0 0个标准循环以内 ,该裂纹也是难于扩展致穿透篦齿环 ;该盘篦齿环上现有的轴向穿透裂纹 ,只要其轴向长度不超过17mm ,就不会危及该盘轮缘上扇形锁板的工作可靠性 ,也不会危及该盘的安全工作。 According to the investigation and analysis, measurement and test of the first stage turbo disk in a certain machine, the main reason for the generation and expansion of the crack was found, and the following conclusions are drawn: If the disk can be controlled at the labyrinth The operating temperature does not exceed 738 ° C, the pyramid tip is very hard to initiate radial cracks; even at the initiation of a radial crack at the tip of the pyramid, the crack is difficult to propagate within 80,000 standard cycles to penetrate the pyramid Ring; the existing axial penetration cracks on the disk girth ring, as long as its axial length does not exceed 17mm, will not endanger the flange reliability of the fan-shaped lock plate flange, it will not endanger the disk safe job.