微量元素碳对GH4169合金性能的影响
Forging & Stamping Technology（2019）
Abstract
采用JMatPro V7.0软件对不同碳含量的GH4169合金性能进行计算,研究微量元素碳对GH4169合金力学性能及蠕变性能的影响.结果 表明:碳含量对γ"相含量有显著影响,随着碳元素含量的增加,γ"相含量先降低至碳含量为0.01％处再上升,当碳含量为0.02％时,γ"相含量开始降低至碳含量为0.05％处再上升;随碳元素含量的增加,室温屈服强度先减小至碳含量为0.01％处后增加,当碳含量为0.02％时,室温屈服强度开始降低后上升,在碳含量为0.05％处,出现极小值;蠕变速率的变化趋势与室温屈服强度相反,随碳含量的增加,蠕变速率在碳含量小于0.02％时先增大再减小,当碳含量高于0.02％时,仍然呈先增大后减小的趋势,极大值出现于碳含量为0.05％处,此时持久寿命较短,蠕变性能不佳;杨氏模量随着碳含量的增加呈现上升趋势.
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