Light rare earth magnesium alloy and preparation method therefor

The invention provides a light rare earth magnesium alloy. The light rare earth magnesium alloy is prepared from the following components in weight percentage: 1.0-3.9 wt% of Sm, 0-1.6 wt% of La and/or Ce, 0.4-1.6 wt% of Zn, 0.3-1.2 wt% of Zr and the balance Mg. According to the light rare earth mag...

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Bibliographische Detailangaben
Hauptverfasser:	NIU XIAODONG, GUAN KAI, LYU SHUHUI, YANG QIANG, LI BAISHUN, MENG JIAN, MENG FANZHI, QIU XIN, ZHANG DONGDONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALLOYS CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention provides a light rare earth magnesium alloy. The light rare earth magnesium alloy is prepared from the following components in weight percentage: 1.0-3.9 wt% of Sm, 0-1.6 wt% of La and/or Ce, 0.4-1.6 wt% of Zn, 0.3-1.2 wt% of Zr and the balance Mg. According to the light rare earth magnesium alloy, an Mg-Sm-Zn-Zr alloy is modified by utilizing a light rare earth element(s) La/Ce relatively low in electronegativity, and as electronegative difference between La/Ce and Mg is relatively big, a stable Mg12RE(La/Ce) intermetallic compound can be more liable to form; and the alloy strength is further increased through second-phase strengthening. The invention further provides a preparation method for the light rare earth magnesium alloy. 本发明提供一种轻稀土镁合金，成分为：1.0～3.9wt％Sm；0～1.6wt％La和/或Ce；0.4～1.6wt％Zn；0.3～1.2wt％Zr；余量为Mg。本发明利用电负性较小的轻稀土元素La/Ce对Mg-Sm-Zn-Zr合金进行改性，La/Ce与Mg的电负性差值较大，更容易形成稳定的MgRE(La/Ce)金属间化合物，通过第二相强化进一步提高合金强度。本发明还提供一种轻稀土镁合金的制备方法。