摘要
为了提高淬火过程计算机模拟精度 ,提出了“系统化处理”方法。该方法以数学模型为基础 ,以试验结果为依据 ,根据冷却曲线和组织转变量用反计算方法求出数学模型中包含的材料和介质的物理参数 ,如热扩散系数、导热系数、相变潜热 (相变温升 )、扩散型相变动力学参数和热通量等。用标准探头测试热通量 ,其他参数用试验材料做成一个圆柱试样在淬火过程的两条或三条冷却曲线和不同半径上的组织转变量计算出来。该方法不仅可以获得计算中用到的物理参数 ,而且减小了计算误差 ,温度的最大计算误差约 10℃ ,组织转变量的最大计算误差约 10 %。
In order to improve the precision of computer simulation of quenching process,a systemized processing method is established in this paper. Based on the mathematical model and testing results,the physical parameters,such as heat diffusion coefficient,thermal conductivity coefficient,phase transformation potential heat phase transformation kinetics and thermal flux are calculated by inverse principle. The thermal flux is measured by a standard conductometer and the others are calculated according to two or three cooling curves in quenching and transformation amounts at different radii of a cylindrical sample made of tested material.The method not only can obtain physical parameters used in calculation but also reduces calculation errors,the maximum error of temperature is about 10℃ and the maximum error of transformation is about 10%.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2003年第3期79-83,共5页
Transactions of Materials and Heat Treatment
关键词
淬火
数学模型
模拟精度
TTT图
quenching
mathematical model
simulation precision
TTT diagram
