铸造技术2018，Vol.39Issue(5)：963-967,5.DOI:10.16410/j.issn1000-8365.2018.05.005
第三代新型镍基单晶高温合金再结晶行为研究
Recrystallization Behavior of a New Third Generation Nickel Based Single Crystal Superalloy
摘要
Abstract
The third generation of new nickel-based single crystal superalloy was heat treated by surface loading and heat treated in the range of 1 100～1 330 ℃ for 4 h in vacuum atmosphere. The effects of temperature and loading on the recrystallization behavior of as-cast and heat-treated alloys were investigated. The results show that the DD9-X superalloys are no significant recrystallization with heat treatment below 1 100 ℃ and 1 200 ℃; the dendritic shape recrystallization grains will be formed with heat treatment at 1 300 ℃; and the equiaxed recrystallization will be occurred at 1 330 ℃. It is proved that the dissolution of γ′ particles is a necessary condition for recrystallization. Under the same circumstances, the depth and area of recrystallization of as-cast state is less than that of heat treatment state specimen due to the absence of coarse γ′ and γ/γ′ eutectic. The area of recrystallization is increased distinctly with the increasing the loading.关键词
DD9-X合金/热处理温度/再结晶/合金状态/载荷Key words
DD9-X single crystal superalloy/heat treatment temperature/recrystallization/alloy states/loading分类
矿业与冶金引用本文复制引用
彭发根,赵玉涛,梁向峰,徐维台,郭振,费孝顺..第三代新型镍基单晶高温合金再结晶行为研究[J].铸造技术,2018,39(5):963-967,5.基金项目
江苏省战略性新兴产业发展专项资助项目(苏发改高技发[2013]2027) （苏发改高技发[2013]2027）
