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Effects of can parameters on canned-forging process of TiAl base alloy(Ⅰ)--Microstructural analyses 被引量:2

Effects of can parameters on canned-forging process of TiAl base alloy(Ⅰ)--Microstructural analyses
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摘要 By using thermal simulation technique, the conventional canned forging process of TiAl based alloy was studied. The effect of can parameters on the microstructures of TiAl alloy was analyzed in this process. The results show that, the deformation microstructure of TiAl based alloy without canning is inhomogeneous. In lateral area, crack and shearing lines can be found; while in central area, fine grained shearing zone can be found. The effect of can is to reduce the secondary tensile stress. However, only when the deformation of the steel can is coincidental with that of TiAl alloy ingot, can this effect be effective. Moreover, a thick can would enhance the microstructural homogeneity in TiAl based alloy. With the H/D ratio of the ingot increasing, the deformation of TiAl alloy would be more unsteady, therefore, a thicker can should be needed. By using thermal simulation technique, the conventional canned forging process of TiAl based alloy was studied. The effect of can parameters on the microstructures of TiAl alloy was analyzed in this process. The results show that, the deformation microstructure of TiAl based alloy without canning is inhomogeneous. In lateral area, crack and shearing lines can be found; while in central area, fine grained shearing zone can be found. The effect of can is to reduce the secondary tensile stress. However, only when the deformation of the steel can is coincidental with that of TiAl alloy ingot, can this effect be effective. Moreover, a thick can would enhance the microstructural homogeneity in TiAl based alloy. With the H/D ratio of the ingot increasing, the deformation of TiAl alloy would be more unsteady, therefore, a thicker can should be needed.
出处 《中国有色金属学会会刊:英文版》 CSCD 2002年第4期596-600,共5页 Transactions of Nonferrous Metals Society of China
基金 Project ( 715 -0 0 5 -0 0 40 )supportedbytheNationalAdvancedMaterialsCommitteeofChina
关键词 锻造 TIAL基合金 显微组织 热机械处理 TiAl based alloy thermal mechanical treatment microstructure
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  • 1黄伯云,Trans NFsoc,1995年,3卷
  • 2贺跃辉,热加工工艺,1995年,1卷,13页
  • 3黄伯云,中南工业大学学报,1995年,26卷,5期,652页

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