研究了热处理工艺对Ti-48Al-7Nb-2.5V-1.0Cr铸造合金组织、室温及900℃拉伸性能的影响.结果表明:铸造合金经1200℃/12 h/AC+1320℃/0.5 h/AC两步热处理后获得双态组织(DP);经1200℃/12 h/AC +1350℃/1 h/CC两步热处理后获得近片层组织(NL).由拉伸实验结果可知,同合金铸态组织相比,DP和NL组织合金的室温塑性均得到明显的改善,断后伸长率由铸态的0.4％提高至双态组织的1.2％,近片层组织的1％～2％;但合金的室温及900℃的强度有不同程度的下降.
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