摘要
试验用75Cr1钢(/%:0.76C,0.30Si,0.70Mn,0.45Cr,0.010P,0.003S)的CSP流程为150 t BOF-LF-60 mm板坯连铸-连轧。通过Thermecmastor-Z热模拟实验机对取自锯片钢75Cr1 60 mm铸坯的试样进行了双道次热压缩实验,分析了温度(1 000~1 150℃),变形量(0.1~0.22),变形速率(0.1~10 s^(-1))以及道次间隔时间(1~80 s)对其静态再结晶的影响,并采用2%应力补偿计算了不同变形条件下的静态再结晶百分率,建立了基于CSP工艺锯片钢75Cr1静态再结晶动力学模型。利用VB编制模拟软件,结合现场生产工艺参数,预报CSP工艺生产75Cr1钢热轧过程中组织演变,得出75Cr1钢合适的精轧工艺-精轧人口温度1 150℃,变形量0.22,应变速率1 s^(-1),道次间隔时间30 s。
The CSP flowsheet of tested steel 75Crl （/% ： 0. 76C, 0. 30Si, 0. 70Mn, 0.45Cr, 0. 010P, 0. 003S） is 150 t BOF-LF-60 mm Slab Casting-Continuous Rolling. The test of double-pass hot deformation of sample taking from 60 mm casting slab of steel 75Crl has been carried out by Thermecmastor-Z thermal simulator to analyze the effect of temperature （ 1 000 ~ 1 150 ℃）, deformation （0. 1 ~ 0. 22 ）, strain rate （0. 1 ~ 10 s ^-1 ） and pass interval time （ 1 - 80 s） on static recrystallization of steel. And static recrystallization fraction in different deformation conditions is calculated by using 2% stress compensation method, and the static recrystallization kinetic model of saw steel 75Crl based on CSP process is established. The evolution of structure of steel 75Crl in hot-rolling process of CSP flowsheet may predict by VB simulation software combined with process parameters at situ. It is obtained that the suitable finishing rolling process parameters for steel 75Crl are finishing inlet temperature of steel 1 150℃, deformation 0. 22, strain rate 1 s^-1 and pass interval time 30 s.
出处
《特殊钢》
北大核心
2017年第5期5-9,共5页
Special Steel
基金
湖北省自然科学基金项目(2014CFB819)
武汉市科学技术计划项目(2015010303010150)资助
