摘要
大型铸钢件的凝固过程直接影响其组织结构和性能，数值模拟作为研究凝固机理和优化工艺的重要手段，能够有效预测温度场和凝固缺陷分布。本文基于有限元方法对大型铸钢件凝固过程进行了系统的数值模拟，分析了温度变化、凝固时间及应力分布特征，结合模拟结果提出了合理的工艺参数优化方案。通过工艺优化，显著改善了铸件内部缺陷和组织均匀性，为大型铸钢件的生产提供了理论支持和技术指导。
关键词： 大型铸钢件；凝固过程；数值模拟；工艺优化；温度场
Abstract
The solidification process of large steel castings directly affects their microstructure and properties. As an important means to study solidification mechanisms and optimize processes, numerical simulation can effectively predict the temperature field and the distribution of solidification defects. In this paper, a systematic numerical simulation of the solidification process of large steel castings was carried out based on the finite element method. The characteristics of temperature change, solidification time, and stress distribution were analyzed. Combined with the simulation results, a reasonable optimization scheme for process parameters was proposed. Through process optimization, the internal defects of the castings and the uniformity of the microstructure were significantly improved, providing theoretical support and technical guidance for the production of large steel castings.
Key words： Large steel castings; Solidification process; Numerical simulation; Process optimization; Temperature field
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