Effects of Sr Addition on the Crystalized Phase in Al-6%Mg-3%Si Alloy
Effects of Sr Addition on the Crystalized Phase in Al-6%Mg-3%Si Alloy
复制标题
效果%20of%20Sr%20添加%20on%20the%20结晶%20相%20in%20Al-6%Mg-3%Si%20合金
DOI：
10.11279/jfes.93.59
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
才川 清二
中科院分区：
文献类型：
--
作者：
福原 輝;大杉 有沙;數田 久生;梶田 拳史;才川 清二
采用金相、扫描电子显微镜和能谱分析等方法，研究了大量锶对铸造于工字形结晶器中的Al-6质%Mg-3质%Si合金的凝固组织和热裂性能的影响。添加质量分数为0.0 4%锶的合金由于细化了二次结晶的共晶组织，如Mg2 Si和α-Al相，热撕裂比不添加锶的合金要小。而当Al-6质量%Mg-3质量%Si合金中的锶含量大于0.04质量%时，热撕裂区的面积分数增加。这种热撕裂区增大的趋势是由Al-Si-Sr金属间化合物的晶化引起的。这些结果表明，大量锶的加入增加了热裂的原因，影响了两种化合物(细板和粗板)的出现时间、它们的浓度差异和出现的频率。
The effects of large amounts of Sr addition on the solidified structures and hot tearing of Al-6mass% Mg-3mass% Si alloys cast into the I-beam shaped mold were investigated by OM, SEM-EDS observations. The hot tearing of 0.04 mass% Sr added alloy was less than Sr free alloys, due to the refinement of secondary crystallized eutectics, such as Mg 2 Si and α-Al phases. On the other hand, when the Sr content in Al-6mass% Mg-3mass% Si alloys was above 0.04 mass%, the area fraction of the hot-tearing region increased. This tendency for the hot tearing region to increase is caused by the crystallization of the Al-Si-Sr intermetallic compound. These findings suggest that the reasons for the increase in hot-tearing with the addition of large amounts of Sr affect the time of occurrence of two types of compounds (fine plate and coarse plate), the difference in their concentrations and frequency of occurrence.