摘要
在高真空高频电磁悬浮熔炼装置上,系统地研究了去除液态 Ni 基合金中异质晶核的微观净化过程,比较了不同净化方法对合金过冷度的影响,并分析了它们的净化机理和净化效果。实验表明,采用熔融玻璃自分离净化法是一种高效而简便的微观净化法,使六元合金(Ni_(0.53)Fe_(0.33)Co_(0.14))_(73)B_(17)Si_8Nb_2获得了417K(0.32T_L)的大过冷度。用净化后的深过冷液态金属进行了快淬,已成功地制备出50μm 厚的非晶条带。在工程上,这一方法为实现应用合金的非晶化开辟了一条途径。
The undercooling of molten metals is an important aspect of investigation inmetallurgical field.With the high vacuum and high frequence electric-magnetic levitation melt-ing equipment,this article has systematically investigated the micro denuleating process ofNi-base alloy,compared the influence of different methods on the undercooling and analyzedtheir principles.The molten glass automatically seperating nucleation technique,which is putforward in this article,proves to be an effective and convenient micro denucleation technique.With this technique,417K(0.32T_L)high undercooling of(Ni_(0.53)Fe_(0.33)Co_(0.14))_(73)B_(17)Si_8Nb_2 alloyhas been obtained.The denucleated alloy has been rapidly quenched to 50μm thick amorphousribbon by single roller.
基金
国家自然科学基金:59081416
关键词
分离
净化
金属
冷度
凝固
undercooling
automatically seperating denucleation technique
amorphous
