摘要
利用 Gleeble- 15 0 0热模拟机研究了快速加热循环热处理工艺对 Ti Al基合金显微组织的影响。结果表明 :利用该工艺可以使铸态 Ti Al基合金的晶团尺寸从约 80 0 μm细化至 5 0 μm以下 ,使加工态 Ti Al基合金的晶团尺寸从约5 0 μm细化至 2 0 μm以下。分析了晶界与相界发生的重结晶形核与长大 ,提出了在快速加热条件下 Ti Al基合金细小α2
The effects of rapid heating cyclic heat treatment on microstructures of TiAl based alloys were studied by means of Gleeble 1500 thermal simulator The results show that the colony size of the as cast TiAl based alloy can be refined from about 800μm to less than 50μm, and that of the two step canning forged TiAl based alloy from about 50μm to less than 20μm, by using this technology The neocrystallization nucleation and growth at the grain boundaries and the phase interfaces were analyzed and a physical model was proposed for explaining the formation of fine α 2/γ fully lamellar microstructure of the TiAl based alloys under rapid heating conditions
出处
《材料工程》
EI
CAS
CSCD
北大核心
2002年第2期29-30,37,共3页
Journal of Materials Engineering
基金
国家"八六三"高技术基金资助项目 (批准号 715 -0 0 5 -0 0 40 )
