研究了Ti-22Al-25 Nb合金环形件的制备工艺和组织性能关系.结果表明:Ti-22Al-25 Nb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℃).
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