田伟,钟燕,梁晓波,张建伟,曾卫东

• 1:中国燃气涡轮研究院材料应用与理化检测研究室
• 2:北京钢铁研究总院高温材料研究所
• 3:西北工业大学材料科学与工程学院

摘要(Abstract)：

研究了Ti-22Al-25Nb合金环形件的制备工艺和组织性能关系。结果表明:Ti-22Al-25Nb合金增加棒材改锻的次数可提高组织均匀性,细化晶粒,从而显著提高合金的室温塑性。对棒材在α2+B2+O三相区(970℃)和α2+B2两相区(1050℃)轧制可分别获得双态组织和板条组织的环形件。两种组织的室温抗拉强度均在1100 MPa以上,室温伸长率在6.5%以上。两种组织相比,双态组织具有更高的强度,而板条组织的塑性更好。根据试验结果,Ti-22Al-25Nb合金在生产应用时,棒材的锻造镦拔次数应不低于8次,环形件轧制应选择在α2+B2两相区(1050℃)。

关键词(KeyWords)： Ti2AlNb基合金;显微组织;成形工艺;拉伸性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 田伟,钟燕,梁晓波,张建伟,曾卫东

DOI: 10.13289/j.issn.1009-6264.2014.10.010

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