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  本文選題：AZS33耐火材料磚 + 溫度�。� 參考：《武漢科技大學》2015年碩士論文

【摘要】：熔鑄AZS33耐火材料在玻璃工業(yè)中應用較為廣泛。采用計算機對其充型凝固過程進行仿真分析，可以直觀的觀測到其充型凝固過程，定量的分析充型、傳熱凝固規(guī)律及各種因素對凝固過程的影響，預測并減少AZS33磚缺陷的產生。 本文針對AZS33耐火材料磚的鑄造特點，建立了熔鑄耐火材料流動、傳熱及凝固過程的數學模型，以尺寸為721mm×506mm×850mm的耐火材料磚為研究對象，采用ProCast軟件模擬計算了不同時刻熔鑄材料在鑄型型腔瞬時充型流動的過程、不同時刻的溫度場分布、凝固進程。預測了鑄件是分層凝固，由表面向鑄件中心逐漸冷卻。并模擬了不同澆冒系統(tǒng)、不同溫度對鑄件縮松縮孔缺陷的影響，選取體積為840mm×640mm×850mm的冒口可將縮松縮孔缺陷轉移到澆冒系統(tǒng)中，結合實際生產，考慮環(huán)境和成本因素，選擇較為合適的澆注溫度為1810oC。 耦合溫度場分析，采用循序耦合場直接耦合分析的方法，結合熔鑄材料凝固過程中的相變效應，構造了熱-相變-力學耦合情況下的力學本構關系，建立了相應的應力計算模型。模擬計算了熔鑄過程的應力場分布，探究了不同鑄型材料、不同保溫層材料對于應力場的影響，預測了熱應力的變化過程是先增大，增大到一個峰值后隨著傳熱趨于穩(wěn)定，，應力值會不斷減小并趨于穩(wěn)定，且應力主要集中在棱邊中點附近。綜合考慮應力峰值和峰值持續(xù)時間，選擇硅砂作為保溫層材料，硅藻土作為保溫層材料。
[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.
【學位授予單位】：武漢科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ175.6

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