高温热电偶材料PtRh40/PtRh20合金性能研究  

Prorerties of PtRh40/PtRh20 High-temperature Thermocouple Wires

作　　者：吴保安[1,2] 刘庆宾[1,2] 陈德茂[1,2] 汪建胜[1,2] 唐会毅[1,2] 陈小军[1,2] 

机构地区：[1]重庆材料研究院,重庆400707 [2]国家仪表功能材料工程技术研究中心,重庆400707

出　　处：《贵金属》2013年第2期15-19,共5页Precious Metals

基　　金：重庆市科技攻关计划项目(cstc2012gg-yyjs50006)资助

摘　　要：PtRh40/PtRh20高温热电偶长期使用温度为1750℃,主要用于飞机尾焰高温测量,属于非标热电偶,目前国内主要依靠进口。研究了PtRh40、PtRh20退火温度与合金电阻率、抗拉强度及加工率与抗拉强度、硬度的关系,并测试了PtRh40/PtRh20热电偶热电性能。结果表明:抗拉强度随退火温度的升高先升高再急剧下降,最后稳定在一个平台,两者大约在900℃时抗拉强度降至最低;电阻率均随退火温度升高而升高;抗拉强度与硬度均随加工率的增加而提高;PtRh40/PtRh20配对热电势相对ASTM E1751-2000标准热电势测试结果为在1200℃时误差为1℃,在1500℃时误差2℃,在1700℃时误差1℃。The long-term using temperature of PtRh40/PtRh20 high-temperature thermocouple wire is 1750℃. PtRh40/PtRh20 is belong to non-standard thermocouple, and mainly applies to measure the aircraft efflux plasma temperature. The influences of annealing temperature on the tensile strength and resistivity of PtRh40 and PtRh20 alloy wires, and the influences of the cold working on tensile strength and vickers hardness of the wires were studied. The results indicated that the tensile strengths increased with the increase of annealing temperature at first, then decreased sharply, finally it is stable forming a platform. The resistivities were increased with the annealing temperature, and the tensile strength and hardness were increased with the cold working. The errors of matching thermoelectric potential of PtRh40- PtRh20 relative to ASTM E1751-2000 standard thermoelectric power is 1℃ at 1200℃, 2℃ at 1500℃, and 1℃ at 1700℃.

关 键 词：金属材料 热电偶 Pt-Rh合金 电阻率 抗拉强度 硬度 

分 类 号：TG146.3[一般工业技术—材料科学与工程]