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研究了稀土Nd对AM60镁合金组织的影响,并分析析出相及其对合金力学性能的影响。结果表明,在AM60合金中加入稀土Nd元素能有效地细化合金组织,使Mg17Al12相分离变细;Nd元素优先与合金中的Al元素反应生成二元高熔点Al11Nd3相;适量的稀土Nd能有效提高合金的抗拉强度、屈服强度和延伸率;过量的稀土Nd则会消耗合金中更多的Al元素和导致Al11Nd3相粗化,使合金的力学性能下降;力学性能测试结果表明,AM60-0.9Nd具有最高的抗拉强度(230MPa)、最高的屈服强度(127MPa)和最高延伸率(14%),分别比基体合金提高28%、48%和250%。
The effect of rare earth Nd on the microstructure of AM60 magnesium alloy was studied and the precipitation phase and its influence on the mechanical properties of the alloy were analyzed. The results show that adding rare earth element Nd into AM60 alloy can effectively refine the microstructure of the alloy and make the phase of Mg17Al12 phase separation and thinning. Nd element preferentially reacts with Al element in the alloy to form binary high melting point Al11Nd3 phase. Appropriate amount of rare earth Nd is effective Improve the tensile strength, yield strength and elongation of the alloy; excessive amount of rare earth Nd will consume more Al in the alloy and lead to Al11Nd3 phase coarsening, the mechanical properties of the alloy decreased; mechanical properties test results show that AM60-0.9 Nd has the highest tensile strength (230MPa), the highest yield strength (127MPa) and the highest elongation (14%), respectively, 28%, 48% and 250% higher than the base alloy.