双相不锈钢中铁素体含量数值模拟和试验研究
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摘要
采用Thermo-Clac热力学计算软件和实验相结合的方法,借助金相显微分析技术,研究了3A、4A两种双相不锈钢铁素体含量随固溶处理温度变化的规律。结果表明,试验钢铁素体含量随固溶温度的升高而增加,在相同固溶温度范围内,模拟结果与试验测试值基本一致;随着温度的升高,数值模拟误差逐渐缩小。数值模拟计算可以作为铁素体含量预测的一种辅助手段,提高研发效率,降低研发成本。
The changing rule of ferrite content in 3 A and 4 A duplex stainless steel(DSS) with the solution temperature were investigated using the combined method of Thermo-Clac thermodynamic calculation and experiments by metallographic observation. The results show that the ferrite content in the DSS increases with the increase of the solution temperature. The simulated results are agreed with the experimental ones at the same solution temperature. And the error of the numerical simulation decreases with the increase of the temperature. It indicates that the numerical simulation can be used as an assistant method for the forecasting of ferrite content to improve the efficiency of research and reduce the cost.
The changing rule of ferrite content in 3 A and 4 A duplex stainless steel(DSS) with the solution temperature were investigated using the combined method of Thermo-Clac thermodynamic calculation and experiments by metallographic observation. The results show that the ferrite content in the DSS increases with the increase of the solution temperature. The simulated results are agreed with the experimental ones at the same solution temperature. And the error of the numerical simulation decreases with the increase of the temperature. It indicates that the numerical simulation can be used as an assistant method for the forecasting of ferrite content to improve the efficiency of research and reduce the cost.
引文
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[2]吴玖.双相不锈钢[M].北京:冶金工业出版社,1999.
[3]胡书茂,邹德林,张艳,等.时效硬化不锈钢中析出相的数值模拟和试验研究[J].铸造技术,2017,38(4):829-831.
[4]Ramirz A J,Lippold J C.The relationship between chromium nitride and secondary austenite precipitation in duplex stainless steels[J].Metallurgical and Materials Transactions A,2003,8(36):1575-1597.
[5]魏晓晋,林玉成,高向明.2507超级双相不锈钢的组织和腐蚀性能研究[J].压力容器,2010,27(10):12-17.
[6]何燕霖,李麟,叶平,等.Thermo-Calc和DICTRA软件系统在高性能钢研制中的应用[J].材料热处理学报,2003,24(4):73-77.
[7]王灵水,杨俊峰,范芳雄,等.数值模拟在高氮奥氏体不锈钢开发中的应用[J].铸造技术,2017,38(4):797-801.