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采用有限元模型,对中厚钢板回温轧制(TRRP,Temperature-Reverting Rolling Process)工艺时的温度场进行了数值模拟,分析水流密度对表层超细晶形成的影响,并在实验室对回温轧制获得的钢板性能进行了评价。结果表明,试验钢获得超细晶的临界冷却温度为580℃;给定回温温度时,随着水流密度增加,冷却时间降低,钢板表层冷却到临界温度以下的厚度增加;与传统TMCP(Thermo-Mechanical Control Process)工艺相比,TRRP工艺下精轧时,钢板内部温度更高,意味着大压下量轧制更容易进行。在实验室进行的TRRP轧制试验,得到了表层超细晶钢,提高了力学性能。
The finite element model was used to simulate the temperature field during the process of TRRP (Temperature-Reverting Rolling Process). The influence of water flow density on the formation of ultrafine crystals was analyzed. In the laboratory, The performance of the sheet obtained from warm rolling was evaluated. The results show that the critical cooling temperature of the ultrafine-grained steel is 580 ℃. With the increase of the water flow density, the cooling time decreases and the thickness of the steel plate below the critical temperature increases. -Mechanical Control Process) process, TRRP process under the final rolling, the steel interior temperature is higher, meaning that the reduction of the amount of rolling easier. In the laboratory TRRP rolling test, the surface of ultrafine-grained steel, improved mechanical properties.