低碳低合金钢铸造过程中凝固曲线的分析及应用  

Analysis and Application of the Solidification Curves of a Low Carbon Low Alloy Steel in the Casting Process

作　　者：万杰 卢燕茹 陈彪 WAN Jie;LU Yanru;CHEN Biao(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China;Department of Materials Science and Engineering,Missouri University of Science and Technology,Missouri Rolla 65401,USA)

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072 [2]密苏里科技大学材料科学与工程学院,美国密苏里州罗拉65401

出　　处：《铸造技术》2022年第4期253-257,共5页Foundry Technology

基　　金：国家自然科学基金面上项目(52071269);重庆市自然科学基金杰出青年项目(cstc2021jcyj-jqX0032)。

摘　　要：数十年来,合金凝固热分析作为一种典型的金属凝固研究技术,被广泛应用到各类合金铸造的过程控制中,如评估合金成分,预测合金组织性能等。本文介绍了两种典型的凝固曲线分析方法:牛顿分析法和傅里叶分析法,用以进行材料凝固过程的热分析。并详细介绍了两种分析法中零曲线的计算方法,并描述了如何利用零曲线和凝固曲线的一次微分曲线计算材料凝固潜热和固相百分数等。最后,将两种方法的计算结果和商用热动力学模拟软件的模拟结果进行了对比。结果表明,傅里叶分析法与商用软件的计算结果更为接近,因此,其在工业化凝固热分析中具有更广泛的应用前景。For decades, thermal analysis of alloy solidification, as a typical metal solidification research technique, has been widely used in the process control of various alloy casting, such as assessing alloy composition, predicting alloy properties,etc. This paper presents two typical methods of solidification curve analysis: Newtonian analysis and Fourier analysis for the thermal analysis of material solidification processes. The calculation of the zero curve in both methods is described in detail, and how to determine the solidification latent heat and the percent of solid phase using the zero curve and the first differential curve of the solidification curve is explained. Finally, the calculation results of the two methods are compared with the simulation results of commercial thermodynamic simulation software. The results show that the Fourier analysis method is closer to the calculation results of the commercial software, and therefore, it has a wider application prospect in the industrial solidification thermal analysis.

关 键 词：凝固曲线分析 牛顿分析法 傅里叶分析法 零曲线 

分 类 号：TG244[金属学及工艺—铸造]