摘要
研究了热变形高铌Ti-Al合金获取全片层组织的热处理工艺及转变机理,提出了新的热处理工艺为:1480℃×10min→1345℃×20min→900℃×2h,空冷。采用新工艺热处理时可使高铌Ti-Al合金中在β相与α相区两次重新形核长大,破坏了原始变形组织中晶粒间的取向关系,从而得到了均匀的α相,因而新工艺热处理后得到较为均匀细小的全片层组织。
The heat treatment process and formation mechanism of fully lamellar (FL) microstructure for a hot-forged high Nb containing Ti-Al alloy were studied, and a novel heat treatment process (1480°C × 10 min -> 1345°C × 15 min -> 900°C × 2 h -> AC) was put forward. During the heat treatment process, both the new β grains and α grains nucleate and grow which breakdowns orientational relationships of original hot-forged microstructure and form uniform α phase. Thus uniform and fine fully lamellar microstructure can be obtained after the new heat treatment process.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2005年第6期62-65,共4页
Heat Treatment of Metals
基金
国家重点基础研究发展规划项目(G20000672062)
国家自然科学基金项目(50274005)
关键词
高铌Ti-Al合金
热变形
热处理
全片层组织
high Nb containing Ti-Al alloy
hot-forged
heat treatment
fully lamellar (FL)microstructure
