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研究了含锰的镁-钍合金在挤压后发生再结晶温度的提高和强度增加的原因。再结晶温度的提高可能是和镁-钍合金中加入锰之后,在铸造状态下锰富集在亚晶界上有关。二元镁-锉合金没有这种亚结构,三元合金在均匀化处理之后亚晶界上的合金元素不均匀性受到了破坏都容易发生再结晶。产生亚结构的原因可能是由于平衡图上锰的分布系数很小的缘故.至于强度增加的原因可能主要是由于提高了再结晶温度,保持有挤压结构,晶体机械性能的各向异性所引起的.
The reasons for the increase of the recrystallization temperature and the increase of the strength of the manganese-containing magnesium-thorium alloy after extrusion were investigated. The increase in recrystallization temperature may be related to the manganese enrichment in the subgrain boundaries in the as-cast state after addition of manganese to the magnesium-thorium alloy. Binary magnesium - file alloy without this sub - structure, ternary alloy in the homogenization treatment sub - grain boundary alloying elements are damaged are prone to recrystallization. The reason for the sub-structure may be due to the small distribution coefficient of manganese in the equilibrium diagram.The reason for the increase in strength may be mainly due to increased recrystallization temperature, retained squeeze structure, anisotropy of the crystal mechanical properties caused by of.