锻压技术

微量元素碳对GH4169合金性能的影响

英文标题：Influence of trace element carbon on properties for GH4169 alloy

分类号：TG132.3

出版年,卷(期):页码：2019,44(12):153-158

摘要：

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。

The properties of GH4169 alloy with different carbon contents were calculated by software JMatPro V7.0, and the influences of trace element carbon on mechanical and creep properties of GH4169 alloy were investigated. The results show that the carbon content has significant influence on the amount of γ″ phase, and with the increasing of carbon content, the content of γ″ phase decreases firstly until the carbon content reaches 0.01% and then increases. When the carbon content is up to 0.02%, the content of γ″ phase decreases again until the carbon content reaches 0.05% and then increases, and with the increasing of carbon content, the yield strength at room temperature decreases firstly until the carbon content reaches 0.01% and then increase. When the carbon content is up to 0.02%, the yield strength at room temperature decreases again and then increases, the minimum value exists when the carbon content reaches 0.05%. However, the trend of creep rates is contrary to that of the yield strength at room temperature, and with the increasing of carbon content, the creep rate increases firstly and then decreases when the carbon content is less than 0.02%. When the carbon content is more than 0.02%, the creep rate increases firstly and then decreases continually, and the maximum value occurs when the carbon content reaches 0.05%. Meanwhile, the creep rupture life is short, the creep property is not good, and the Young′s modulus increases with the increasing of carbon content.

基金项目：

中央高校基本科研业务费专项资金项目（3102019 ZX004）

袁颖菁（1997-），女，硕士研究生 E-mail：yuanyingjing@foxmail.com 通讯作者：王建国（1987-），男，博士，助理研究员 E-mail:wjgnll@126.com

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