9Ni钢拉伸性能的同步辐射高能X射线原位研究
发布时间：2019-07-19 06:49
【摘要】：利用热膨胀仪、同步辐射高能X射线衍射、XRD和TEM等对经淬火+两相区处理+不同温度回火处理的9Ni钢中逆变奥氏体含量、逆变奥氏体在室温单轴拉伸过程的形变诱导相变及其对强度的影响规律进行了研究.结果表明,经780℃淬火和680℃两相区处理后,实验钢中不含逆变奥氏体,而在随后的回火过程中产生一定量的逆变奥氏体.逆变奥氏体含量随回火温度的上升先升高而后降低,600℃回火时逆变奥氏体含量最高.在室温拉伸过程中,逆变奥氏体的形变诱导相变开始于宏观屈服之后,在颈缩前基本全部转变成马氏体,从而屈服强度随回火温度的升高先减小后增大,600℃回火时屈服强度最小;抗拉强度随回火温度的升高而增大,640℃回火时抗拉强度最大.
[Abstract]:Thermal dilatometer, synchroradiation high energy X-ray diffraction, XRD and TEM were used to study the deformation induced transformation of inverter Austenite and its effect on strength in 9Ni steel tempered at different temperatures after quenching and tempering at different temperatures. The results show that there is no inverter Austenite in the experimental steel after quenching at 780鈩，
本文编号：2516134
[Abstract]:Thermal dilatometer, synchroradiation high energy X-ray diffraction, XRD and TEM were used to study the deformation induced transformation of inverter Austenite and its effect on strength in 9Ni steel tempered at different temperatures after quenching and tempering at different temperatures. The results show that there is no inverter Austenite in the experimental steel after quenching at 780鈩，
本文编号：2516134
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