30Cr1Mo1V转子钢蠕变行为的实验研究

Experimental research on the creep behavior of 30Cr1Mo1V rotor steel

对30Cr1Mo1V转子钢三种不同组织在恒温恒应力条件下蠕变行为的实验研究发现,恒温条件下蠕变速率的对数与应力成线性关系,并且该线性关系的斜率随温度增加而增加;在相同温度应力条件下,珠光体组织的蠕变速率最大,马氏体原始组织次之,而奥氏体组织最小。在研究实验材料的蠕变行为后发现,其蠕变速率可用新的数学模型εc=A0sinh(B0Tnσ)来描述,其中A0、B0、n为材料常数。不同原始组织材料的A0、B0、n值可根据实验数据用拟合方法获得。实验结果表明,该模型能很好地反映本实验所获得的蠕变规律。

Experimental research on the creep behavior of 30Cr1 Mo1 V rotor steel has been carried out at isomermm and isostress condition. It has been found that the logarithm of creep rate is direct proportional to the applied stress at the same temperature and the slope increases with the increment of creep temperature. At the isothermal and iso-stress condition,the creep rate of Pearlite structure is the largest one,while that of anstenite structure is the smallest one. It has revealed that the creep rate can be expressed by a new model of εc = A0sinh（B0T^nσ） , where A0 ,B0 ,n are constants of materials which can be determined by experiments. The experimental results show that the above model can describe the creep behavior of this steel very well.