ProCAST在金属型重力铸造充型和模具温度场中的应用.pdfVIP

学兔兔 Dec．2008 V0I．57 N0．12 ·l263· ProCAST在金属型重力铸造充型和 模具温度场中的应用 汪 煦，赵玉涛，苏大为，周 茎 (江苏大学材料科学与工程学院，江苏镇江212013) 摘要：金属型模具热平衡状态是影响铸件质量及模具寿命的关键因素，模具的温度场决定了模具承受热应力的程度。 运用有限元分析软件ProCAST对金属型重力铸造中模具温度场进行了连续铸造过程的热分析，研究了自然冷却条件和 强制冷却条件对模具温度场的影响。结果表明，多周期循环浇注时，随着循环浇注次数的增加，温度是不断变化的， 当循环浇注7次后，模具内部建立了相对稳定的温度梯度，模具逐渐达到了热平衡状态。 关键词：金属型重力铸造；模具；充型模拟；热平衡；温度场 中图分类号：TG249．3．39 文献标识码：A 文章编号：1001—4977(2008)12—1263—04 Simulation of Mold Filling and Temperature Field of Mold in Metal Mold Gravity Casting bv PrOCAST WANG Xu，ZHAO Yu-tao，SU Da—wei，ZHOU Kun (School of Materials Science and Engineering，Jiangsu University，Zhenjiang 21 201 3， Jiangsu，China) Abstract：Heat balance of metal mold is critical to the quality of castings and the serving life of the mold．Temperature distribution of mold determines the degree that the mold enduring thermal stress．Temperature distribution of mold in metal mold gravity casting has been analyzed by using FEM software ProCAST．The influences of natural cooling condition and force cooling condition have been investigated．The results showed that temperature changed with the increase of casting cycles， the steady temperature gradient was founded inside casting mold in seven casting cycles，and then heat balance of metal mold was reached gradually． Key words：metal mold gravity casting；mold；mold filling simulation；heat balance；temperature field 金属型模具的寿命受许多因素的影响，其中热冲击 1 充型模拟及分析 和交变热应力是主要因素。由于高温的液态金属对模具 型腔表面的反复冲刷，使模具型腔表面温度不断上升， 1．1 材料初始条件及边界条件的确