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热处理对二次锻造高Nb-TiAl基合金组织的影响

Effect of Heat Treatment on the Microstructure of Two-step Forging for High Nb Containing TiAl Alloy

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【作者】徐丽华；徐向俊；王艳丽；林均品；宋西平；林志；陈国良；李树索；苏喜孔；韩雅芳；

【Author】 XU Li-hua~1,XU Xiang-jun~1,WANG Yan-li~1,LIN Jun-pin~1,SONG Xi-ping~1,LIN Zhi~1,CHEN Guo-liang~1,LI Shu-suo~2,SU Xi-kong~2,HAN Ya-fang~2(1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China; 2. Research Institute of Advanced Materials, Beijing University of Aeronautics and Astronautics, Beijing 100083, China)

【机构】北京科技大学新金属材料国家重点实验室；北京航空航天大学高性能材料研究所；北京航空航天大学高性能材料研究所北京100083；北京100083；北京100083；

【摘要】研究了热处理对二次锻造高Nb-TiAl基合金组织的影响。通过对Ti-45Al-9(Nb,W,B,Y)金属间化合物进行不同的热处理,得到不同的显微组织。结果表明,经1310℃/20min+1250℃/2h/AC热处理后,β相被有效地消除,得到细小均匀的双态组织。此后直接加热到α单相区,得到条带状的全片层组织。增加在两相区的停留,得到相对比较均匀细小的全片层组织。将锻造组织先转变为近γ组织再进行全片层组织处理,得到最均匀细小的全片层组织。更多还原

【Abstract】 Effect of heat treatment processings on the microstructure of two-step forging for high Nb containing TiAl alloy was investigated. Different heat treatment processes were employed to obtain different microstructures of Ti-45Al-9(Nb,W,B,Y) alloy. The results show that, after the heat treatment of 1310/20min+1250/2h/AC, the β phase can be efficiently eliminated and the uniform fine duplex microstructures can be gained. Followed by the heat treatment at α single phase region directly, striped FL microstructure of coarse colony and fine colony is obtained. The holding at (α+γ) phase region can result in the homogenous fine FL microstructure relatively. The FL microstructure produced by the heat treatment of HT6 is the most homogenous and finest.更多还原

【关键词】高Nb-TiAl合金；热处理；显微组织；
【Key words】 <Keyword>high Nb containing TiAl alloy； heat treatment； microstructure；

【基金】国家重点基础研究发展规划(G200067206-2)

【文献出处】航空材料学报 ,Journal of Aeronautical Materials , 编辑部邮箱 ,2005年04期

【分类号】TG166
【被引频次】11
【下载频次】357

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