抽拉速率对定向凝固Ti-47Al-2Cr-2Nb-0.8B合金组织的影响
收稿日期: 2010-02-08
修回日期: 2010-04-30
网络出版日期: 2010-07-11
EFFECT OF WITHDRAWAL RATE ON THE MICROSTRUCTURE OF DIRECTIONAL SOLIDIFIED Ti-47Al-2Cr-2Nb-0.8B ALLOYS
Received date: 2010-02-08
Revised date: 2010-04-30
Online published: 2010-07-11
杨莉莉 , 张虎 , 肖志霞 , 郑立静 , 闫洁 . 抽拉速率对定向凝固Ti-47Al-2Cr-2Nb-0.8B合金组织的影响[J]. 金属学报, 2010 , 46(7) : 879 -884 . DOI: 10.3724/SP.J.1037.2010.00081
The microstructures, morphology of boride and grain refinement in directional solidified Ti-47Al-2Cr-2Nb-0.8B alloy with different withdrawal rates have been investigated. The results indicated that the primary phase, borides and their precipitation consequence varied with the increasing of withdrawal rates (0.36, 5, 10 and 20 mm/min). The morphologies of borides and grain refinement were affected by the solidification paths due to the different withdrawal rates. The alloy with fine grains and borides were obtained at the withdrawal rate of 5 mm/min.
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