摘要
将Ti-TiCN与Al-Ti-B细化剂对比,研究了Ti-TiCN复合细化剂的抗Zr“中毒”性能,并探究新细化工艺能否改善“中毒”现象。研究发现:在Al-Zr合金中添加质量百分数0.3%Al-Ti-B的铝锭在730℃经5 min保温后晶粒尺寸已经增加至毫米级,而添加质量百分数0.3%Ti-TiCN的合金在相同温度下保温60 min后,晶粒仅长大至200μm左右,说明Ti-TiCN细化剂具有更好的抗Zr“中毒”性能。通过在Al-Zr合金中单独添加Ti,发现Zr“中毒”现象与TiAl3相失去形核作用有很大关系。因此,先添加细化剂后添加Zr,可以改善合金的Zr“中毒”现象。
Anti-Zr“poisoning”performance of Ti-TiCN refiner was studied by comparing with Al-Ti-B refiner,and effect of a new refinement process on poisoning performance was investigated.The results show that grain size of aluminum ingots with 0.3%Al-Ti-B refiner rises to millimeter scale at 730℃for 5 min,while the grain size of samples with 0.3%Ti-TiCN refiner is only grow to about 200μm for 60 min at the same temperature.The results indicate the Ti-TiCN refiner has better Zr“poisoning”resistance than Al-Ti-B.When adding Ti alone into Al-Zr alloy,TiAl3 phases lost its nucleation effect.Therefore,adding order of alloying element is refiners first and then Zr.It was found that this process can improve the“poisoning”of Zr.
作者
项雁玲
包礼
XIANG Yanling;BAO Li(School of Aeronautical Engineering,Civil Aviation Flight University of China,Guanghan 618300,China)
出处
《有色金属工程》
CAS
北大核心
2020年第6期9-16,28,共9页
Nonferrous Metals Engineering
