低温钢筋穿水冷却工艺

发布时间：2018-07-02 12:53

  本文选题：低温钢筋 + 温度场　； 参考：《钢铁》2015年07期

【摘要】：根据低温钢筋穿水冷却工艺特点,利用现场实测数据并结合理论分析得到不同规格低温钢筋穿水冷却过程中的对流换热系数。采用MSC Marc有限元软件与现场试制结果对低温钢筋穿水冷却过程进行了研究。研究了冷却水流量、终轧温度、穿水时间等工艺参数对低温钢筋温度场和组织演变的影响。模拟结果表明:当冷却水流量为120 m3/h时,钢筋芯部开始有珠光体转变;当冷却水流量为400 m3/h时,钢筋芯部无铁素体转变;冷却水流量为160~200 m3/h时,所获得的组织为针状铁素体与贝氏体。终轧温度增加50℃,出水冷装置后钢筋表面温度约增加10℃,返红温度约增加30℃;在200 m3/h水流量下冷却1.2 s,终轧温度为1 050℃时,其芯部组织为针状铁素体与细小的贝氏体。在相同水压与水流量条件下,随着穿水速度的增加,淬透层深度减小,返红温度增加。
[Abstract]:According to the process characteristics of transwatered cooling of low temperature steel bar, the convection heat transfer coefficient of low temperature steel bar during the process of water cooling is obtained by using field measured data and theoretical analysis. In this paper, MSC Marc finite element software and field trial production results are used to study the transwatered cooling process of low temperature steel bars. The effects of cooling water flow rate, finishing rolling temperature and water passing time on the temperature field and microstructure evolution of low temperature steel bar were studied. The simulation results show that when the cooling water flow rate is 120 m3 / h, the pearlite transition begins to occur in the steel core; when the cooling water flow rate is 400 m3 / h, there is no ferrite transition in the steel core; and the cooling water flow rate is 160 ~ 200 m3 / h. The microstructure obtained is acicular ferrite and bainite. The final rolling temperature increases 50 鈩，

本文编号：2090188