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本文讨论了铝合金的组织结构对磁化率及磁性特征的影响。合金组织中的固溶体及化合物相具有的磁性特征和磁化率值以及它们在组织中的相对数量,是决定合金磁化率的主要因素。通常,铝固溶体具有顺磁性,抗磁性的溶质原子铜、锌等及类似锂、镁的顺磁性元素均能降低铝的顺磁磁化率值。铜与铝及其它元素形成的二元或多元化合物,大多具有抗磁性。合金的磁化率值随着抗磁性化合物数量的增多而降低。当化合物相的数量达到一定程度的情况下,合金的磁化率值可能接近或达到零值。此外,铝固溶体的晶粒大小及铝合金中常见的氧化夹杂物对合金磁化率值也会产生一定的影响。
This article discusses the microstructure and magnetic susceptibility of the aluminum alloy. The magnetic characteristics and magnetic susceptibility values of the solid solution and the compound phase in the alloy structure and their relative amounts in the structure are the main factors that determine the magnetic susceptibility of the alloy. In general, the aluminum solid solution has a paramagnetic, diamagnetic solute atom of copper, zinc, and paramagnetic elements such as lithium and magnesium, which reduce the paramagnetic susceptibility value of aluminum. Copper and aluminum and other elements formed binary or multiple compounds, most of the diamagnetism. The magnetic susceptibility of the alloy decreases as the amount of diamagnetic compound increases. When the number of the compound phase reaches a certain level, the susceptibility value of the alloy may approach or reach zero. In addition, the grain size of the aluminum solid solution and the common oxide inclusions in the aluminum alloy also have an influence on the susceptibility of the alloy.