摘要
研究了冷轧Ｉｎｃｏｎｅｌ７１８合金的再结晶行为及退火过程中硬度的变化规律。结果表明，在９１０Ｃ退火温度下，奥氏体完全再结晶，随冷轧变形量增加，完成９０％再结晶所需要的时间降低，再结晶晶粒尺寸减小。硬度的变化取决于奥氏体的回复与再结晶和б、γ″、γ′相的析出。在９１０℃退火温度下，硬度急剧降低，达到极小值后又增加，极小值点的硬度随冷轧变形量增加而增加。在８６０Ｃ退火温度下，奥氏体的回复与再结晶使冷轧变形大于２５％试样的硬度降低，随后γ″、γ′相的析出使硬度增加，达到极大值后又降低，在２ｈ后硬度缓慢增加或趋于稳定。
The recrystallization behavior and the variation in hardness of cold rolled Inconel 718 alloy have been investigated in the temperature range of 810～910℃ as a function of cold rolling reduction and annealing time. It is shown that the austenite can be fully recrystallized at 910℃. As the cold rolling reduction increases, the 90% recrystallization time and the recrystallized grain size decrease. The variation in hardness depends on the recovery and recrystallization of austenite and the precipitation of δ, γ″, γ′phases. At 910℃, hardness initially decreases sharply, and then increases. Hardness at the extreme point increases with cold rolling reduction increasing. At 860℃, hardness initially decreases due to the recovery and recrystallization of austenite for the more than 25% cold rolled samples, and then increases due to the precipitation of γ″,γ′phases. After 30 minutes hardness decreases up to 2 hours and then increases slightly or remaIns constant.
出处
《航空材料学报》
CAS
CSCD
1996年第3期33-38,共6页
Journal of Aeronautical Materials
基金
中国航空工业总公司重点攻关项目
关键词
合金
再结晶
硬度
析出相
冷轧
Inconel 718 alloy, recrystallization, hardness, precipitate
