材料工程Issue(8)：42-47,6.
表面处理对第二代单晶高温合金胞状再结晶的影响
Effects of Surface Treatment on Cellular Recrystallization of a Second-generation Single Crystal Superalloy
摘要
Abstract
The effects of surface processing and heat treatment conditions on cellular recrystallization behaviors were investigated in a 2nd generation Ni-base single crystal superalloy after different surface treatment and then heat treating at 1000-1200 ℃ under vacuum condition. The results indicated that the cellular microstructure after heat treatment was observed in all specimens and the thickness of cellular recrystallization zone increased with the surface processing of grinding, grit blasting and shot penning, respectively. The thickness of the cellular layer was up to 0. 1mm in shot penning samples after heat treating at 1200℃for 50h. And low-angle boundaries lower than 5° and high-angle boundaries within the range of 35-45° for misoriented angles existed not only between different cellular colonies, but also between the cellular recrystallization zone and the substrate. In addition, the heat treatment temperature played a more significant role than the holding time in the change of growth rate and layer thickness for the cellular recrystallization.关键词
单晶高温合金/胞状再结晶/磨削/吹砂/喷丸Key words
single crystal superalloy/cellular recrystallization(CR) /grinding/grit blasting/shot penning分类
矿业与冶金引用本文复制引用
魏文娟,唐海军,冯强..表面处理对第二代单晶高温合金胞状再结晶的影响[J].材料工程,2011,(8):42-47,6.基金项目
国家自然科学基金资助项目(60879009,51071016) （60879009,51071016）
民航安全技术分析和鉴定实验室开放研究基金资助项目(2009003) （2009003）
