一种定向凝固高温合金的薄壁效应研究  

THIN-WALL EFFECT OF A DIRECTIONALLY SOLIDIFIED SUPERALLOY

作　　者：张宏炜[1] 陈荣章[1] 

机构地区：[1]北京航空材料研究院,北东100095

出　　处：《金属学报》1997年第4期370-374,共5页Acta Metallurgica Sinica

摘　　要：采用定向凝固无余量精铸工艺，制造了接近于空心涡轮叶片的形状和壁厚的管状薄壁（l＝0.8－1.6mm）试样，研究了一种定向凝固高温合金的薄壁性能。结果表明，薄壁试样的持久性能与标准试样（直径5mm）相比没有明显的下降，说明在本试验条件下，该合金的薄壁效应不明显。从工艺因素和显微组织方面讨论了试验结果。The thin-wall effect of a directionally solidified superalloy has been studied by using tubular hollow specimens (wall thickness l= 0.8, 1.2,1.6 mm) whose shape and thickness are similar to the hollow turbine blades made by the near-shape investigation cast procedure.The results show that stress-rupture properties of thin-wall specimens are not reduced remarkably comparing that of the standard ones (5 mm diamater), i.e., thin-wall effect of this alloy is not remarkable in this experiment. The results differing from that of previous works are discussed in term of cast process and microstructure.

关 键 词：定向凝固 高温合金 薄壁效应 显微组织 

分 类 号：TG132.32[一般工业技术—材料科学与工程]