Technological Development for Neutralizing Contamination by Impurities in Recycled Aluminum Alloys by Control of Solidification Reaction

污染物的影响，在回收期间对金属进行染色，以及用于去除对回收铝合金的机械性质的失效的有用元素。进一步的、结晶化化合物的形状和尺寸，以及颗粒尺寸是由电磁铸造和微合金的应用改变的，其对机械性能的影响也是评估的。（1）当Mn和Zr时，从熔融中去除铁的有效性将其添加到6061 AI-Mg-Si合金，一个复合物含有Mn含量中的增加，因此，年龄的硬度较低，证明压力和张力减弱。用JIS指定的0.3%Zr来保证张力属性中的芒果含量应少于0.4%质量%。（2）当Si，当它被污染时，3003 A1-锰合金从堆叠材料中提取，而Ca，它是一个有效的元素，可以添加到合金，数量 ... More 由于一个A1-Fe-Si化合物增加，即硅含量增加，结果在证明压力和张力强度中增加，但在延长中减少。在Ca上添加0.3%的Ca上添加值上升到A1-Fe-Si化合物的消失和更大数量的钴A1-Fe-Si化合物的结晶化，以及在某种程度上，可以显著地降低长度。（3）电磁铸造应用于制造一个薄5052 A1-Mg细胞实验室，使晶体化的化合物变得非常好和均匀地分布。因此，即使当水晶化化合物的数量因Fe含量的增加而增加时，该化合物也是有用的，以加强和完善水晶化颗粒的差异。作为一个结果，它是有可能增加证明压力和张力强度，同时保持足够的铁含量达到0.81%。（4）作为将Mn、Sr和Ca添加到含有0.7% Fe的少量锰、Sr和Ca的结果，可以找到0.005%精炼A1-Fe-Si化合物的Sr添加和改善T4处理的制剂的证明强度和张力强度以及T6处理的制剂的长度，将满足JIS对低密度性能要求的结果

Effects of impurities, which contaminate the melts during recycling, and useful elements for removal of the impurities on mechanical properties of the recycled aluminum alloys were investigated. Furthermore, shapes and sizes of the crystallized compounds, and grain size were altered by an application of electromagnetic casting and micro alloying, and their influences on mechanical properties were also evaluated.(1) When Mn and Zr, which are effective for removal of iron from the melt, are added to the 6061 AI-Mg-Si alloy, a compound containing Si increases with an increase in Mn content and, therefore, age hardenability is lowered and proof stress and tensile strength decrease. The manganese content in the alloy with 0.3% Zr should be less than 0.4mass% to guarantee the tensile properties specified by JIS.(2) When Si, which contaminate 3003 A1-Mn alloy from a cladding material, and Ca, which is an effective element for the removal of Si from the melt, are added to the alloy, the amount … More of a A1-Fe-Si compound increases as Si content increases, resulting in increases in proof stress and tensile strength, but a decrease in elongation. An addition of Ca above 0.3% gives rise to the disappearance of the A1-Fe-Si compound and the crystallization of a large amount of coarse A1ィイD26ィエD2(Fe,Mn) compound, and consequently, to remarkable degradation of elongation.(3) Application of electromagnetic casting to the fabrication of a thin 5052 A1-Mg slab makes the crystallized compounds to be very fine and uniformly distributed. Therefore, even when the amount of crystallized compounds increases with an increase in Fe content, the compounds are useful for the dispersion strengthening and refining of the recrystallized grains. As a result, it is possible to increase proof stress and tensile strength while maintaining enough elongation with Fe content of up to 0.81%.(4) As a result of adding small amount of Mn, Sr and Ca to 6N01 Al-Mg-Si alloy containing 0.7% Fe, it is found that Sr addition of 0.005% refines A1-Fe-Si compound and improves proof strength and tensile strength of T4-treated specimens and elongation of T6-treated specimens, resulting in satisfying JIS requirement on tensile properties Less