AZS33耐火材料砖熔铸过程的仿真分析

发布时间：2018-05-04 09:02

本文选题：AZS33耐火材料砖 + 温度　；参考：《武汉科技大学》2015年硕士论文

【摘要】：熔铸AZS33耐火材料在玻璃工业中应用较为广泛。采用计算机对其充型凝固过程进行仿真分析，可以直观的观测到其充型凝固过程，定量的分析充型、传热凝固规律及各种因素对凝固过程的影响，预测并减少AZS33砖缺陷的产生。本文针对AZS33耐火材料砖的铸造特点，建立了熔铸耐火材料流动、传热及凝固过程的数学模型，以尺寸为721mm×506mm×850mm的耐火材料砖为研究对象，采用ProCast软件模拟计算了不同时刻熔铸材料在铸型型腔瞬时充型流动的过程、不同时刻的温度场分布、凝固进程。预测了铸件是分层凝固，由表面向铸件中心逐渐冷却。并模拟了不同浇冒系统、不同温度对铸件缩松缩孔缺陷的影响，选取体积为840mm×640mm×850mm的冒口可将缩松缩孔缺陷转移到浇冒系统中，结合实际生产，考虑环境和成本因素，选择较为合适的浇注温度为1810oC。耦合温度场分析，采用循序耦合场直接耦合分析的方法，结合熔铸材料凝固过程中的相变效应，构造了热-相变-力学耦合情况下的力学本构关系，建立了相应的应力计算模型。模拟计算了熔铸过程的应力场分布，探究了不同铸型材料、不同保温层材料对于应力场的影响，预测了热应力的变化过程是先增大，增大到一个峰值后随着传热趋于稳定，，应力值会不断减小并趋于稳定，且应力主要集中在棱边中点附近。综合考虑应力峰值和峰值持续时间，选择硅砂作为保温层材料，硅藻土作为保温层材料。
[Abstract]:Melt-cast AZS33 refractories are widely used in glass industry. By computer simulation and analysis of the mold filling and solidification process, the mold filling and solidification process can be observed intuitively. The effects of mold filling, heat transfer and solidification law and various factors on the solidification process can be quantitatively analyzed, and the defects of AZS33 brick can be predicted and reduced. According to the casting characteristics of AZS33 refractory brick, a mathematical model of flow, heat transfer and solidification of molten refractory brick is established in this paper. The research object is 721mm 脳 506mm 脳 850mm refractory brick. The transient filling process, temperature field distribution and solidification process of the casting materials at different times in the mold cavity were simulated by ProCast software. It is predicted that the casting is stratified solidified and cooled gradually from the surface to the center of the casting. The effects of different pouring systems and different temperatures on the shrinkage defects of castings are simulated. The risers with volume 840mm 脳 640mm 脳 850mm can transfer the shrinkage defects to the casting system. Combined with the actual production, the environmental and cost factors are considered. The suitable pouring temperature is 1810 OC. Coupling temperature field analysis, the direct coupling analysis method of sequential coupling field and the phase transformation effect during solidification of molten casting materials are used to construct the mechanical constitutive relation under the coupling of thermo-phase-transformation and mechanics. The corresponding stress calculation model is established. The stress field distribution in the melting and casting process is simulated and calculated. The influence of different casting materials and different insulating layer materials on the stress field is investigated. It is predicted that the variation process of the thermal stress increases first, increases to a peak value, and then tends to stabilize with the heat transfer. The stress value decreases and tends to be stable, and the stress is mainly concentrated near the midpoint of the edge. Considering the peak stress and the duration of peak stress, silica sand and diatomite are selected as insulating layer material.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ175.6

【参考文献】