汽轮机低压转子锻件锻造的关键技术

介绍了一种新FM法。由于低压转子锻件的尺寸大，容量相同的汽车轮机低压转子锻悠扬要比高中压转子锻件的制造难度大。大型汽轮低压转子锻件常规生产工艺，在镦粗体（h/d＞1）中心区域存在两向拉应力，在WHF法的拔长体中存在一向或两向拉应力。如果不区分锻造作用的阶段性，前道工序的作用很可能被后续工序消除或减弱，所以应用最新发展的新工艺方法、优化组合进行锻造，才有可能使得各阶段的变形机制得到最佳配合。

KEY TECHNIQUES FOR MANUFACTURING LOWER-PRESSURE TURBINE-ROTOR FORGING

A new FM method is presented. The manufacturing lower pressure turbine rotor forging is more difficult than producing a higher pressure or a medial pressure turbine rotor forging with the same power, which is because of the larger dimensions of a lower pressure rotor forging. With the conventional technologies used to produce heavy lower pressure turbine rotor forgings, there exist two dimension tension stress in the central zone of a upsetting body ( h / d >1), there exists one dimensional tension stress or exist two dimensional tension stresses in a stretching body deformed with WHF method. If the phase effect of forging are not distinguished, the effects of forging of the preceding process may be eliminated or weakened by the later one. Therefore, with the conventional forging used, the designs of forging technology must be done by stages, the different key matters are resolved in the different forging stages only with the recently developed technologies and with the forging methods optimally composed to utilize, it is possible that the optimum coordination of the deformation mechanisms of different stages is obtained.