Zr-4合金与H13模具钢的界面换热行为研究  

Interfacial Heat Transfer Behavior Between Zr-4 Alloy and H13 Die Steel

作　　者：倪嘉 王练[3] 张志豪 谢建新 Ni Jia;Wang Lian;Zhang Zhihao;Xie Jianxin(Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China;Key Laboratory for Advanced Materials Processing (MOE),Beijing 100083,China;State Nuclear Bao Ti Zirconium Industry Company,Baoji 721013,China)

机构地区：[1]北京科技大学新材料技术研究院,北京100083 [2]材料先进制备技术教育部重点实验室,北京100083 [3]国核宝钛锆业股份公司,陕西宝鸡721013

出　　处：《稀有金属材料与工程》2019年第5期1579-1583,共5页Rare Metal Materials and Engineering

基　　金：国家重点研发计划资助项目(2017YFB0306200)

摘　　要：测定了界面有、无玻璃润滑剂条件下Zr-4合金和H13模具钢的界面接触温度随接触时间的变化曲线,在此基础上分析了界面换热特征,获得了界面换热系数随初始界面温度变化的函数式。结果表明,玻璃润滑剂可有效减缓Zr-4合金与H13钢的界面传热,当Zr-4合金和H13钢的初始界面温度分别为700和470℃时,有玻璃润滑剂时Zr合金表面温度达到稳定的时间约为16.3 s,该时间段内相应的界面换热系数随实验时间的延长由226 W/(m^2·℃)增大到2166W/(m^2·℃),无润滑剂时Zr合金表面温度达到稳定的时间约为7.7 s,该时间段内界面换热系数由250W/(m^2·℃)增大到2700 W/(m^2·℃)。采用本研究确定的换热系数随温度变化的关系式进行热交换模拟可以获得较高的模拟精度,模拟与实验结果的最大误差约为4.5%。The contact temperature-time curves between Zr-4 alloy and H13 die steel with glass lubrication and without glass lubrication were measured and the characteristics of the interface heat transfer were analyzed.The corresponding empirical formula between the interfacial heat transfer coefficient and the temperatures of both the Zr-4 alloy and die steel were established.The results show that glass lubricant can reduce the interfacial heat transfer between the Zr-4 alloy and the die steel effectively.When the initial temperatures of the Zr-4 alloy and the die steel are 700 and 470 ℃,respectively,the temperature of the zirconium alloy surface tends to be stable at time of about 16.3 s and the IHTC (interfacial heat transfer coefficient) is increased from 226 W/(m^2·℃) to 2166 W/(m^2·℃) during this time under the condition of glass lubrication,while the temperature of the zirconium alloy surface tends to be stable at time of about 7.7 s and the IHTC is increased from 250 W/(m^2·℃) to 2700 W/(m^2·℃) during this time without glass lubrication.The empirical formula of IHTC obtained in this paper has such high accuracy that the maximum error between the simulated and experimental results is about 4.7%.

关 键 词：ZR-4合金 模具钢 界面换热系数 玻璃润滑剂 

分 类 号：TG376.2[金属学及工艺—金属压力加工] TG146.414[一般工业技术—材料科学与工程]