真空感应熔炼用石墨坩埚对Ni_(47)Ti_(44)Nb_9形状记忆合金质量的影响  

The Influence of Crucible Graphite on the Quality of Ni_(47)Ti_(44)Nb_9 Shape Memory Alloys During the Vacuum Induction Melting Process

作　　者：杨根林[1] 王二敏[1] 韩劲[1] 倪志铭[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《材料工程》2011年第11期51-52,57,共3页Journal of Materials Engineering

摘　　要：研究了三种不同种类的石墨坩埚进行真空感应熔炼Ni47Ti44Nb9形状记忆合金。一种是低密度的挤压石墨材料,另外两种是不同孔隙度和纯净度的等静压石墨材料,并且用纯Ni,Ti和Nb原材料进行Ni47Ti44Nb9形状记忆合金熔炼。采用低等级、低密度石墨坩埚进行熔炼,合金铸锭的碳含量会升高;选用高密度、高纯净度的石墨坩埚可以获得较好质量的合金铸锭。The performance of three different kinds of crucible graphite materials used during vacuum inductive melting of Ni47Ti44Nb9 shape memory alloys（SMAs） was explored.One low-density extruded graphite and two isostatically pressed graphite-materials with different porosity and purity were used for melting Ni47Ti44Nb9-SMAs from pure Ni,Ti and Nb raw materials.The use of a low grade,lower density graphite crucible led to a high carbon contamination of the alloy ingot.Much better results were obtained using graphite crucibles with higher density and higher purity.

关 键 词：NI47TI44NB9 形状记忆合金 真空感应熔炼 石墨坩埚 

分 类 号：TG224[金属学及工艺—铸造]