论文部分内容阅读
基于二维非稳态传热-多相流耦合模型和三维非稳态单辊结晶器传热模型,结合生产数据,对平流铸造Fe_(78)Si_9B_(13)时熔潭形成过程中的流动、传热现象以及结晶器内的传热特征进行了研究.结果表明:在文中工艺条件下,熔潭稳定形成后,其上游弯月面呈C形,下游弯月面呈带波纹的斜坡状;结晶器达到热平衡状态的时间为20 s;高温熔体对结晶器冲击后,会在距表面0.0004 m范围内形成一个热冲击区,该区域表面中心最高温度可达513.5 K;与径向热膨胀相比,结晶器周向热膨胀对实际总膨胀量的贡献更大,约为96%.
Based on the two-dimensional unsteady heat transfer-multiphase flow coupling model and the three-dimensional unsteady single-roll mold heat transfer model, combined with the production data, the flow during the formation of molten pool by Fe 7 8 Si 9 B 13 is simulated. , The heat transfer phenomenon and the heat transfer characteristics in the mold were studied.The results show that the upper meniscus has a C shape and the lower meniscus has a corrugated slope ; The time for the mold to reach the thermal equilibrium state is 20s; after the high-temperature melt impinges on the mold, it forms a thermal shock zone in the range of 0.0004m from the surface, the maximum temperature in the center of the surface can reach 513.5K; In contrast, the circumferential thermal expansion of the mold contributes even more to the actual total expansion, about 96%.