摘要
研究了固溶温度和保温时间对冷变形Inconel718合金晶粒长大的影响.在980℃～1000℃固溶处理时,晶粒长大缓慢,晶粒长大动力学指数为0.122～0.181,指数随固溶温度升高而增加.在980℃固溶处理时,保温时间不超过60min,可以得到细小的混晶组织;在990℃～1090℃固溶处理时,保温时间30min,晶粒均匀长大,晶粒均匀长大的表观激活能Q=176kJ/mol,晶粒长大是通过晶界空位扩散的晶界迁移机制.保温时间60min,在990℃～1030℃温度区间,晶粒长大不显著,当温度超过1030℃,晶粒明显粗化.
The effects of solution heat treatment （SHT） on the grain growth in cold-deformed lnconel718 alloy have been investigated. The results reveal that the grain grow slowly during the anneal at 980℃, 990℃ and 1000℃. The growth exponents （η） have a small value, and are 0.122, 0.177 and 0.181, respectively. The values of η increase with the raise of SHT temperature. A fine structure can be obtained after annealing at 980℃. When annealed at 990℃～1090℃, the δ phase is precipitated. Holding 30 min, the effect of the δ phase is not obviously, grain grow equably. The experimental data of the apparent activiation energy （Q） for grain grow is 176 kJ/mol .The gain grow kinetics is that the grain boundary migrate by atoms diffuse though boundary vacancy. Holding 60 min, during 990℃～1030℃, the grain diameter D has a slightly increase with the increase of the solution temperature. Above 1030℃, grain coarsen.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第8期1338-1340,共3页
Rare Metal Materials and Engineering
