Effects of Ti Metamorphic Disposal on Solidification Structure of Fe-Ni Base Invar Expansion Alloy
YANG Xiao-hua1,2, CHEN Wei-qing1, HAO Zhan-quan1
1. School of Metallurgy and Ecological Engineering, University of Science & Technology Beijing, Beijing 100083, China; 2. Sub-institute of Metal Materials, Beijing General Research Institute of Mining & Metallurgy, Beijing 100044, China
Abstract：Metamorphic disposal method and SEM graphic analysis were applied to evaluate the effect of Ti metamorphic disposal on solidification structure of Fe-Ni base invar expansion alloy.The results show that great amount of high-melting compounds(Ti2O3)with the size of 2μm are formed in the Fe-Ni base invar expansion alloy after Ti metamorphic disposal.The Ti2O3 acts as the heterogeneous nucleation,so the solidification structure of the alloy is refined from complete dendrite grain to most equiaxed grain.TiN,TiC,Ti(NC),Ti2O3 which take effect of preventing the growth of crystal grain are distributed in interface of equiaxed grain.
杨晓华, 陈伟庆, 郝占全. Ti对Fe-Ni膨胀合金凝固组织的影响[J]. 材料工程, 2010, 0(9): 7-9,14.
YANG Xiao-hua, CHEN Wei-qing, HAO Zhan-quan. Effects of Ti Metamorphic Disposal on Solidification Structure of Fe-Ni Base Invar Expansion Alloy. Journal of Materials Engineering, 2010, 0(9): 7-9,14.
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2010, Vol. 0 
