摘要
研究了固溶冷却速度和时效时间对一种镍基单晶高温合金中γ′相的析出的影响。合金经1 250℃固溶处理4 h,从炉中快速取出,分别进行空冷、油冷和水冷,以考察冷却速度对γ′相析出的影响。随后对固溶处理后试样进行时效处理,以考察时效时间和固溶冷却速度对γ′相长大的影响。结果表明,合金在固溶处理后,γ′相尺寸随固溶冷却速率的升高而下降。在时效处理时,γ′相尺寸的增大率随固溶冷却速度的增大而减小;随着时效时间的增加,γ′相的尺寸增加。
The effects of cooling rate and aging time on the precipitation of γ′-phase in a single crystal superalloy were studied.The superalloy was cooled in air,oil and water after solution heat treatment at 1 250 ℃ for 4 hours,respectively,to study the effect of cooling rate on the precipitation of γ′-phase.The solution treated samples were aging treated at 850 ℃ for 24 hours to study the effects of cooling rate and aging time on the growth of γ′-phase.The experiment results show that the size of γ′-phase decreases with the increase of cooling rate during the process of cooling.During the aging process,the size enhancement coefficient of γ′-phase increases as cooling rate decreases,and the size of γ′-phase increases with the increase of aging time.
出处
《科学技术与工程》
2011年第15期3523-3526,共4页
Science Technology and Engineering
关键词
单晶高温合金
γ′相析出
固溶处理
时效处理
single crystal superalloy γ′-phase precipitation solution heat treatment aging treatment
