黑龙江科技大学学报2024，Vol.34Issue(2)：223-229,7.DOI:10.3969/j.issn.2095-7262.2024.02.009
Al-Ti-B微观组织对7085铝合金细化效果的影响
Effect of Al-Ti-B microstructure on refining 7085 aluminum alloy
摘要
Abstract
This paper intends to compare the different effects of microstructures of the three kinds of Al-Ti-B master alloy on the grain size,hardness,and electrical conductivity of 7085 aluminum alloy.The study is enabled by investigating the microstructures and mechanical properties of 7085 aluminum alloy refined by Al-Ti-B master alloy by using metallographic microscope,SEM,Vickers hardness tester,and eddy current conductivity meter.The results show that there is no significant difference in the morphology and average size of TiAl3 and TiB2 phases in three kinds of Al-Ti-B alloys,and there are fewer micro-structural defects.The better refinement effect lies in distribution range of TiB2 particle of the two Al-5Ti-0.2B alloys with narrower size,which refines the grain size of 7085 aluminum alloy with Zr content of 0.1%to 168 μm.TiB2 particles of Al-5Ti-1B alloy with narrower size distribution range and higher con-tent can refine grain size of the alloy to 112 μm.The narrower particle size distribution range,the high fitting degree and the increase of the core number of the heterogeneous nucleation inhibit Zr"poisoning"phenomenon and improve the hardness and conductivity properties,as which have positive effect on the refinement.关键词
7085铝合金/Al-Ti-B中间合金/TiB2粒径/晶粒细化Key words
7085 aluminum alloy/Al-Ti-B master alloy/TiB2 particle size/grain refinement分类
矿业与冶金引用本文复制引用
李学伟,岂心亮,权新虎,齐佰良,郭永超,张宇..Al-Ti-B微观组织对7085铝合金细化效果的影响[J].黑龙江科技大学学报,2024,34(2):223-229,7.基金项目
国家级大学生创新创业训练计划项目(202310219042X) （202310219042X）
