铜钢双金属熔铸过程水冷换热系数的反求及应用  

Reverse Calculation and Application of Water Cooling Heat Transfer Coefficient in Casting Process for Copper/Steel Bimetal

作　　者：李志明 尹延国[1] 方小亮 刘凌峰 LI Zhiming;YIN Yanguo;FANG Xiaoliang;LIU Lingfeng(Institute of Tribology,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学摩擦学研究所,安徽合肥230009

出　　处：《热加工工艺》2023年第24期32-37,共6页Hot Working Technology

摘　　要：铸件凝固过程的边界换热系数是一个重要的边界条件参数,也是决定温度场模拟精度的关键因素。为了获得铜钢双金属样件的水冷换热系数,本文根据反传热法,通过实测水冷过程的温度曲线,利用ProCAST软件反求水冷换热系数。结果表明,随着样件温度的降低,水冷换热系数先增加后减小,在350℃达到峰值4980 W/(m^(2)·℃)。对比模拟和相同条件下的实验,反求的换热系数模拟精度高,准确预测出缺陷的位置。分析温度场后对工艺进行改进,使用改进的工艺成功消除产品的缺陷。The boundary heat transfer coefficient of casting solidification process is an important boundary condition parameter and a key factor to determine the simulation accuracy of temperature field.In order to obtain the water-cooling heat transfer coefficient of copper/steel bimetallic sample,according to the inverse heat transfer method,through the measured temperature curve of water-cooling process,the water-cooling heat transfer coefficient was inversely calculated by ProCAST software.The results show that with the decrease of sample temperature,the water-cooling heat transfer coefficient first increases and then decreases,reaching a peak of 4980 W/(m^(2)·℃)at 350℃.Compared with the simulation and the experiment under the same conditions,the simulation accuracy of the reverse heat exchange coefficient is high,accurately predicts the location of defects.After analyzing the temperature field,the process was improved,and the product defects were successfully eliminated by using the improved process.

关 键 词：铜钢双金属 温度场模拟 反传热法 边界换热系数 

分 类 号：TG244[金属学及工艺—铸造] TG156.1