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利用Gleeble-3500热模拟试验机对HRB500E的冷却过程进行研究。结果表明,HRB500E的相转变温度受冷却工艺的控制。试样组织随转变温度的变化而变化。随突变温度的降低和冷却速度的提高,组织中贝氏体含量上升。在相同工艺条件下,随吐丝温度的提高,贝氏体含量增加。通过控制冷却工艺可对其相转变温度进行调控,进而改变室温组织以改善材料的性能。
The cooling process of HRB500E was studied by Gleeble-3500 thermal simulation testing machine. The results show that the phase transition temperature of HRB500E is controlled by the cooling process. The sample structure changes with the change of temperature. With the decrease of mutation temperature and the increase of cooling rate, the content of bainite in the tissue increased. Under the same process conditions, the bainite content increases with the increase of the spinning temperature. By controlling the cooling process can be phase transition temperature regulation, and thus change the room temperature to improve the performance of the material.