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℃.
参考文献
| [1] | 黎鼎鑫.贵金属材料学[M].长沙:中南工业大学出版社,1991:246-230. |
| [2] | 长崎诚三;刘安生.二元合金状态图集[M].北京:冶金工业出版社,2004:79-82. |
| [3] | 胡赓祥;钱苗根.金属学[M].上海:上海科学技术出版社,1980:143-150. |
| [4] | 陈景.贵金属物理性质与原子结构的关系[J].中国工程科学,2000(07):66-73. |
| [5] | 贵金属编写组.贵金属材料加工手册[M].北京:冶金工业出版社,1976:273-280. |
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