激光加工气膜孔对定向凝固高温合金薄壁持久性能的影响  

EFFECT OF LASER FORMED HOLES ON STRESS RUPTURE PROPERTIES 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

出　　处：《航空材料学报》1998年第1期29-31,50,共4页Journal of Aeronautical Materials

摘　　要：采用定向凝固无余量精铸工艺制造的接近于空心涡轮叶片形状和壁厚的管状薄壁（δ＝１．２ｍｍ）试样，研究了激光加工孔对定向凝固高温合金薄壁持久性能的影响。结果表明，在９００℃／３７０ＭＰａ下，与没有孔的薄壁试样相比，有一排孔的试样持久性能没有明显降低，有两排孔的试样持久寿命略有下降。显微分析表明，激光加工孔对组织没有明显的影响，只是稍微减小了承载面积，而且只有在出现两排激光孔时才有所表现。The effect of laser formed holes on the thin wall stress rupture properties of a directionally solidified superalloy is studied by using tubular thin wall specimens (δ=1.2mm) with shape and thickness similar to the hollow turbine blades made by the near shape investment cast procedure. The results show that stress rupture properties of specimens with one row of holes do not reduce remarkably and that of those with two row of holes reduce slightly, comparing that of ones without holes. It is found that the microstructure are not influenced by the holes and the net loading area reduce slightly as in these specimens with two row of holes.

关 键 词：激光加工孔 定向凝固 高温合金 持久性能 薄壁 

分 类 号：TG132.32[一般工业技术—材料科学与工程]