型壳预热及浇注温度对某联体叶片铸造成形性的影响  

Effect of Shell Preheating and Pouring Temperature on Cast Formability of a Combined Guide Vane

作　　者：高成薇[1] 于兴福[2] 黄爱华[1] 丛键[1] 曲殿鹏 冯文刚[1] 

机构地区：[1]中航工业沈阳黎明航空发动机(集团)有限责任公司,辽宁沈阳110043 [2]沈阳工业大学材料科学与工程学院,辽宁沈阳110870

出　　处：《铸造》2012年第8期882-885,共4页Foundry

摘　　要：通过对一种多联体导向叶片型壳保温包覆方式、型壳预热温度和浇注温度的调整,完成了某航空发动机用多联体导向器叶片的精密铸造工艺探索。研究结果表明,当仅包覆型壳外表面时,叶片出现冷隔、浇不足问题。当对横浇道及型壳外表面均包覆保温毡后,铸件的成形性较好,但叶身出现裂纹。通过调整型壳预热温度、浇注温度和降低冷却速度的方法使叶片的合格率稳定在80%左右。采用不同的保温包裹方式铸造的多联体叶片微观组织形貌相同,合金性能均能满足铸件标准要求。By adjusting shell package, preheating temperature and pouring temperature of a combined guide vane, the investment casting process for a certain aero-engine combined guide vane was completed. The results show that only packages the outer surface of the shell, the misrun and cold shut defects of the vane appeared. When the runner and the shell outer surfaces are packaged with insulation blankets, the cast formability is better, but cracks appeared on the vane body. The yield of guide vane is stable at around 80% by adjusting the shell preheating temperature, pouring temperature and reducing cooling rate. The microstructures of combined guide vane are same by using different shell package and the alloy properties can meet the standard requirement of castings.

关 键 词：联体导向叶片 浇不足 预热温度 浇注温度 

分 类 号：TG244[金属学及工艺—铸造]