基于MATLAB统计工具箱的5182铝合金组织及性能研究

Study of microstructures and properties of 5182 aluminium alloy based on MATLAB Statistics Toolbox

文章比较不同细化方法细化5182铝合金的晶粒细化能力,同时用MATLAB统计工具箱采用统计分析方法对均匀化处理前后的5182铝合金的硬度进行分析。结果证明,Al-5Ti-1B细化合金的晶粒最小,含钛铝锭(GRAI)+0.25%Zr细化合金的晶粒略大于Al-5Ti-1B细化合金;GRAI中分别加入0.16%La、0.20%RE(富铈混合稀土)后,合金晶粒变化不大;GRAI制造的5182铝合金比Al-5Ti-1B、Al-10Ti中间合金细化的合金硬度高;加0.25%Zr使GRAI制造合金硬度增加;对于均匀化前的合金,加0.16%La使GRAI制造合金硬度减小,而加0.20%RE硬度变化较小;对于均匀化处理后的合金,加0.16%La使GRAI制造合金硬度变化较小,而加0.20%RE使GRAI制造合金硬度增加。均匀化处理,使合金的硬度有所下降,GRAI+0.25%Zr细化合金的硬度下降幅度最大。

The grain refining efficiency of different methods for 5182 aluminium alloy is studied. And the hardness of 5182 aluminium alloy before and after homogenization treatment has been analyzed with statistical analysis methods using MATLAB Statistics Toolbox. The results show that the grain of 5182 aluminium alloy refined by A1-5Ti-IB master alloy is the finest of all the studied alloys, and the grain of 5182 aluminium alloy refined by GRAI＋0. 25%Zr is a little coarser than that by A1-5Ti- 1B. Adding 0. 20%RE （cerium-rich mixtures of Rare Earth） and 0. 16%La into GRAI hardly changes the grain refining efficiency. The hardness of 5182 aluminium alloy produced by the Ti-containing aluminium ingot（GRAI） is higher than that refined with AI-5Ti-1B and Al-10Ti master alloys. Adding 0. 25%Zr into 5182 aluminium alloy produced by GRAI increases the hardness. Adding 0. 16%La into 5182 aluminium alloy produced by GRAI decreases the hardness before homogenization treatment, whereas the hardness hardly changes owing to 0.16%La addition after homogenization treatment. Adding 0.20%RE into 5182 aluminium alloy produced by GRAI hardly changes the hardness before homogenization treatment, whereas the hardness increases owing to 0.2%RE addition after homogenization treatment. Homogenization treatment makes the hardness of all of alloys decrease. The alloy refined with GRAI＋0.25%Zr decreases the most.