Abstract: The dynamic CCT curve measurement and rolling process simulation test of AG650LW steel are carried out by gleeble-3800.It is obtained that the structure to satisfy 650 MPa rim steel is ferrite + bainite + a small amount of pearlite, with end rolling temperature at 840～880 ℃and coiling temperature at 480 ℃, laminar flow cooling rate after rolling≥ 10 ℃/s, and hardness value≥220HV.The comprehensive crack ratio of the test coil is 4.3%, which meets the requirement of the user.

Key words: 650 MPa, AG650LW Steel, Wheel Rim Thermal Simulation Cooling Rate, Coiling Temperature, Cracking Rate

摘要： 通过Gleeble-3800热模拟试验机对AG650LW钢进行动态CCT曲线测定和轧制工艺模拟试验，得出满足650 MPa轮辋钢性能要求的组织为由铁素体+贝氏体+少量的珠光体，其终轧温度840～880℃,卷取温度480℃,轧后层流冷却速率≥10℃/s,硬度≥220HV。试验钢卷的综合开裂率4.3‰,满足了用户的加工期望要求。

关键词: 650 MPa, AG650LW钢；车轮轮辋；热模拟；冷却速率；卷取温度；开裂率