高性能钨铼热电偶材料及补偿技术研究

摘要

介绍了高性能钨铼热电偶材料制备方法,分析了钨铼热电偶材料热电特性影响因素及其补偿方式,通过EDS、SEM等分析手段,对微量元素分布、材料微观组织等进行表征,探讨了微量元素分布及微观组织与热电特性的关系,同时分析了钨铼热电偶补偿温度对测温精度的影响,该热电偶材料制成的快速偶头现场测试结果显示其稳定性可控制在±3℃以内,具有良好的测温可靠性.%In this paper, a high-quality WRe thermocouple material is prepared and it's thermo-electric property and compensation method are analyzed, the distribution of trace elements and microstructure of WRe thermocouple material were characterized by energy dispersive spectrometer scanning electron microscope (EDS-SEM),X-ray diffraction (XRD),the effect of the distribution of trace elements and microstructure on the thermo-electric property were investigated, and relation of the compensation temperature of WRe thermocouple and the measures temperatures accuracy were analysed. This type of thermocouple material is made into the quick response WRe thermocouple and it is used to measures temperatures in liquid steel, the result showed that temperature stability of the quick response WRe thermocouple is ±3℃.