Rhenium Thermocouple Characteristics and Production Process

Tungsten-Rhenium Thermocouples Features

Tungsten-rhenium thermocouples is high temperature thermocouples. It has the potential of a linear relationship between temperature, thermal stability, reliable, cheap, etc.. And display instrument for direct measurement of liquids, steam and gases such as temperature. It can partially substitute platinum-rhodium thermocouple as high metallurgical industry, high-temperature electronic thermoelectric systems and space vehicle structural engineering, ultra-high temperature nuclear reactors measurement tools.

Tungsten-rhenium thermocouples for temperature dependence of thermopower meet ZBN05003-88 indexing table, equivalent ASTME696-84 standards. In a vacuum, reducing, inert atmosphere, at 0 ~ 2300 ℃ range. The use of special protective tube tungsten rhenium even can at 1600 ℃ under oxidizing atmosphere, long-term use, its price is lower than the platinum-rhodium thermocouple.
 
Tungsten-rhenium thermocouples production process

1: The Pre-alloyed Powders

Percentage by weight, said anode materials and cathode materials for each component were prepared anode materials and cathode materials, the use of high-energy dispersion method, reverse three speed 80-150r/min, dispersion time 15-20h

2: Forming

Mechanical pressing, pressure 150-450Mpa, time 15-20s

3: The Pre-Sintered

In a reducing atmosphere 1300-1500 ° * 3h

4: Vertical Melt

Separated into two parts, the first paragraph: 2000A * 20min, second :2800-3300A * 450min

5: Swaged:

Temperature of 1300-1600 °, pass compression rate is greater than 25%, processing size range 10% -20%

7: Cleaning

Electrolytic cleaning lye, lye concentration :15-20%, electrolysis voltage 30-100V, time 5s

8: Annealing

Finished wire annealing temperature 1200-1500 °, time 30-60min

9: Finished Packaging

Vacuum Packaging

 

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