【作者】 王芹；

【导师】 袁守谦；

【作者基本信息】 西安建筑科技大学 ， 钢铁冶金， 2004， 硕士

【摘要】 锻件质量好坏与钢锭的质量有着密切关系，而钢锭的质量在很大程度上又与其凝固过程相关。本课题采用数值传热学的方法，编制相关的计算机程序，模拟钢锭凝固过程中温度的分布，为评价钢锭内部质量奠定了基础，进而达到指导生产提高钢锭质量的目的。 论文通过对钢锭铸造凝固过程及其简化条件下换热边界条件的分析、讨论，建立起钢锭铸造凝固的二维非稳态温度场计算数学模型，并据此编制计算机程序，经调试后得到反映钢锭铸造凝固过程中温度场分布的程序。 运用所编制的程序，可以计算相似结构的钢锭在其凝固过程中的温度场变化情况。为了提高钢锭锻压比，借鉴钢锭模设计的传统经验，对原有钢锭模结构进行了重新设计，尝试优化钢锭模结构来改善钢锭的整体质量。利用该程序，设计人员可以对钢液在新型钢锭模中的凝固温度场进行预测和评价，也可以通过对比来优化钢锭模设计。 本课题所进行的钢锭凝固过程温度场数值模拟、钢锭模结构优化为模拟软件的第一阶段研究。它为进一步研究钢锭凝固奠定了基础，也为钢锭模结构优化设计提供了参考依据。更多还原

【Abstract】 Quality of forging has intimate relations with quality of ingot. Quality of ingot is to a great extent connected with its solidification process. By means of numerical heat transfer theory and advanced computer, a competer program is written to simulate temperature field distribution in the process of solidification. It is fundamental in assessing internal quality of ingot. It is great helpful for guiding production and improving quality of ingot.A two-dimensional unsteady temperature field calculation mathematical model has been formulated here by analyzing ingot solidification process and the various heat exchange boundary conditions in simplified condition. Hence program is writeen. Then, The program for temperature distribution of solidification process is obtained after adjusting.Change of the temperature distribution for ingot with similar structure is also computed by the program during solidification process. Traditional experiments of ingot mould design is drawn on .The existing ingot mould structure has been redesigned and optimized to raise forging rate and improve quality of ingot. Designer may predict and assess temperature field of steel solidification in new-type ingot mould. Meanwhile, designer may optimize design of ingot mould by comparison.It is the first phase for study of simulation soft .It is fundamental in studying deeply on ingot solidification and provides reference for optimization design of ingot mould structure.更多还原