二级涡轮盘在试车过程中发生了突然爆破,发动机被分成二节,涡轮盘分成两半飞出。此爆破是在加大转速约1分多钟发生的。试验分析结果表明:该破坏起源于层状缺陷,其层状缺陷均由脆性铝酸钙组成,严重地隔离钢基体的连续性,成为盘子早期破坏的隐患。一、金相观察从涡轮盘宏观断裂形貌来看,盘子沿着灰色夹层断成两半,如图1所示。 Two stage turbine disk in the test process occurred suddenly burst, the engine is divided into two sections, the turbine disk in two out. This blasting is to increase the speed of about 1 minute occurred. The experimental results show that the failure originates from lamellar defects, and the lamellar defects are composed of brittle calcium aluminate, which severely isolates the continuity of the steel matrix and becomes the hidden danger of early plate disintegration. First, the metallographic observation Turbine macroscopic rupture from the point of view, the plate along the gray layer cut in half, as shown in Figure 1.