论文部分内容阅读
通过Fluent计算,设计了四线切分冷却器内部结构。计算结果认为,冷却器入射角的合理设计值为35°;在水压1MPa、流量100m3/h条件下,当湍流管喉口直径d分别为15、22、30mm时,对流换热系数最大值分别为16、12和11kW/(m2.℃);为了防止冷却器返水造成的冷却不均匀,建立了压力、流量与环缝的调节关系模型。低温控轧的四线切分使金属流变速度降低。为了生产顺行和减小线差,对预切分孔型K4和切分孔型K3的楔间距、楔角、两边切分孔半楔角、辊缝和楔角半径等参数进行优化设计。结合测定的CCT曲线,通过Ansys温度场分析制定了合理的两次控冷工艺参数,实现了基圆在P+F组织条件下合金元素减量化生产。
By Fluent calculation, the internal structure of four-line split cooler is designed. The calculation results show that the reasonable design value of the incident angle of the cooler is 35 °. Under the conditions of water pressure 1MPa and flow rate 100m3 / h, when the throat diameter d of the turbulent pipe is 15, 22 and 30mm respectively, the maximum value of convection heat transfer coefficient Respectively, 16,12 and 11kW / (m2. ℃). In order to prevent the uneven cooling caused by the cooler back to water, a model was established to regulate the pressure, flow rate and girth. Low temperature controlled rolling of the four-wire cutting to reduce the rheological speed of the metal. In order to reduce the linearity between the pre-cut hole K4 and the split hole K3, the parameters of pre-cut split hole K4, wedge angle, half-wedge angle of split holes on both sides, roll gap and wedge radius were optimized. According to the measured CCT curve, the reasonable secondary cooling control parameters were established by Ansys temperature field analysis, and the reduction of alloying elements under the P + F microstructure was achieved.