不同熔炼条件下B、C元素对Ti-47Al-2Cr-2Nb合金铸态组织的影响  

Effect of Boron and Carbon Addition on the Microstructure of Ti-47Al-2Cr-2Nb Alloy under Different Melting Conditions

作　　者：张毅斌[1] 杨磊[2] 张龙新[3] 

机构地区：[1]中国人民解放军海军驻鞍山钢铁集团公司军事代表室,辽宁鞍山114001 [2]北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京100088 [3]华能丹东电厂,辽宁丹东118300

出　　处：《钛工业进展》2009年第6期23-26,共4页Titanium Industry Progress

摘　　要：研究了不同熔炼条件下B、C元素对Ti-47A l-2Cr-2Nb合金的铸态组织的影响。研究结果表明:B、C元素的添加显著地细化了TiA l基合金的组织片层,C元素的细化效果优于B元素。在所研究的精炼时间内,无论添加微量元素B还是C元素,精炼时间为30 m in时获得的铸锭组织中片层最细。Small amounts of boron and carbon addition were introduced into the as-cast Ti-47Al-2Cr-2Nb alloy by different melting methods. The microstructures of Ti-47Al-2Cr-2Nb-0. 8B and Ti-47Al-2Cr-2Nb-0. IC alloys were investigated. The results showed that the gains of as-cast Ti-47Al-2Cr-2Nb alloy were remarkably refined due to the addition of B or C. The lamellar space of TiAl based alloy added with C was superior to that added with B. The technics with refining for 30 minutes is the optimum one for ingots made by maglev induction melting furnace, no matter whether B or C is added.

关 键 词：TIAL基合金 B添加 C添加 微观组织 

分 类 号：TG27[金属学及工艺—铸造]