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通过OM、SEM、失重法和电化学方法研究了含铝量对蒙乃尔(Monel)合金组织及性能的影响。结果表明:随着铝含量从2%逐渐增加到4%(质量分数,下同),存在于枝晶间的离异γ′共晶相的面积比率逐渐增大;并且在不同的铝含量下,该含铝Monel合金在模拟海水中的腐蚀形式为点蚀,同时,随着铝含量的逐渐增加,该含铝Monel合金在模拟海水中的耐蚀性先增强后减弱。当铝含量为3%时,合金的耐蚀性达到本实验范围内的最佳。
The effect of aluminum content on the microstructure and properties of Monel alloy was studied by OM, SEM, weight loss method and electrochemical method. The results show that the area ratio of the segregated γ ’eutectic phase existing in the interdendritic phase increases with the increasing of the content of aluminum from 2% to 4% (mass fraction, the same below). Under the different aluminum content, The corrosion of aluminum-containing Monel alloy in simulated seawater is pitting corrosion. Meanwhile, with the increasing of aluminum content, the corrosion resistance of the aluminum-containing Monel alloy increases first and then decreases in simulated seawater. When the aluminum content is 3%, the corrosion resistance of the alloy reaches the best within the scope of this experiment.