定向凝固镍基高温合金的成分因素对涡轮叶片热裂的影响  

EFFECT OF ELEMENT FACTORS OF A DIRECTIONALLY SOLIDIFIED Ni-BASE SUPPERALLOY ON HOT TEAR IN TURBINE BLADES

作　　者：杨政[1] 田飞[1] 郑志[2] 朱耀宵[2] 

机构地区：[1]西安航空发动机(集团)有限公司,西安710021 [2]中国科学院金属研究所,沈阳110016

出　　处：《金属学报》2002年第11期1191-1194,共4页Acta Metallurgica Sinica

摘　　要：定向凝固合金可铸性的最重要标志就是它的热裂倾向性,亦即合金在定向凝固过程中产生沿纵向晶界开裂的倾向性.根据一种镍基高压涡轮工作叶片在试制过程中暴露出的严重热裂问题,通过进一步的实验对比与分析,讨论了该合金的成分因素对定向空心叶片热裂的影响.The hot-tear tendency, i.e., cracking along the vertical crystal boundary produced in the course of the directional solidification, is the most important indication of the castability to a directionally solidified superalloy. This paper discussed the effect of element factors of a diretionally solidified Ni based superalloy on hot tear by way of the further tests and analysis based on the fact that there are lots of hot tears in the turbine blades at the trial-produce stage.

关 键 词：定向凝固 镍基高温合金 涡轮叶片 热裂 有效结晶温度区间 化学成分 航空发动机 

分 类 号：V252.2[一般工业技术—材料科学与工程]