包套锻复合热机械处理技术中TiAl基合金显微组织细化的机理

来源期刊：中南大学学报(自然科学版)1997年第4期

论文作者：贺跃辉 黄伯云

文章页码：355 - 358

关键词：TiAl基合金； 热机械处理； 显微组织； 热分析

Key words：TiAl based alloy； thermal-mechanical treatment； microstructure； thermal-analyses.

摘    要：对比研究了常规热机械处理和包套锻复合热机械处理技术中，材料的显微组织和热学行为．揭示了常规热机械处理下，由于应力分布不均匀和变形过程中充分地发生着动态再结晶，造成材料的显微组织不均匀；而在包套锻复合热机械处理技术下，由于实现快速变形，热变形材料储能高，随后的等温再结晶退火可获得均匀的显微组织．

Abstract: The microstructures and thermol behaviors of TiAl based alloy thermal-mechanical treated by both normal processing and new technique were investigated. It was found that the sample produced by normal thermal-mechanical treatment showed inhomogeneity, which was due to the dynamic-recrystallization of hot-deformed material. However,In the processing of multi-step thermol-mechanical treatment for sample canned, TiAl based alloy can iran form into uniform microstruture after annealing treatment at a temperature. because of the rapid hot deformation