研究了17-4PH钢连续加热条件下的相变行为。结果表明,17-4PH钢在连续加热条件下,相变临界点Ac1、Ac3都随加热速率的加大而提高,转变温区也相应向高温扩展。奥氏体转变量与温度的关系呈S形,转变速率df/dt非定值且存在一个峰值。通过Kissinger法计算,确定17-4PH不锈钢的奥氏体化相变激活能为47.3kJ/mol。 The phase transition behavior of 17-4PH steel under continuous heating was studied. The results show that the critical temperature Ac1, Ac3 of 17-4PH steels increase with the increase of heating rate under the condition of continuous heating, and the transition temperature zone expands to high temperature accordingly. The relationship between the amount of austenite transformation and temperature is S-shaped, and the rate of change df / dt is unscheduled and there is a peak. Through the Kissinger method, the activation energy of austenitization transformation of 17-4PH stainless steel was determined to be 47.3kJ / mol.