涡轮叶片高速定向结晶工艺的研究和应用

A STUDY OF DIRECTIONAL SOLIDIFICATION PROCESS OF TURBINE BLADES AND ITS APPLICATION ASPECTS

本文介绍了燃气涡轮发动机叶片新的铸造工艺方法的研究和在批生产中的推广应用以及专门为此工艺创制的装置和新型高温合金。文中给出了这种新工艺的示意图,其要点是采用了液体金属结晶器、双区电阻加热器和专门制造的符合工艺要求的陶瓷铸型和型芯。采用液体金属冷却剂显著提高了结晶铸件的散热速度,大大改变了合金的组织状态,显著提高了合金全部组分的弥散程度,对合金性能产生了良好的影响。文章还介绍了新工艺方法及装置在批生产条件下的试用情况,并列出了前五年批生产厂用上述方法生产叶片的合格率数据.

A new process of cast turbine blades and its application in batch production are described.Besides the special device for this purpose and new superalloys are also introduced.A schematic drawing of the new process is shown,the key point of which is adopting the crystallizer of liquid metal,double-region resist- ance heater and specially manufactured ceramic mould and core in accordance with technological demand. The use of metal coolant results in obvious enhancement of heat radiation spe- ed of casting,improvement of structure of alloy and dispersity of all compo- sitions,and good effect on property of alloy. The trail run of new process and device in production condition is also des- cribed,and percents of qualitified blades produced by factories in the first five years are sumerized.