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Dispersion strengthening platinum/rhodium10-platinum thermocouple wires and production method thereof

A technology of dispersion strengthening and platinum thermocouple, which is applied in the direction of directly heat-sensitive electrical/magnetic element thermometers, measuring heat, and using electrical devices, etc. Poor anti-pollution ability and other problems, to achieve the effect of strong anti-pollution and corrosion ability, stable thermal electromotive force, and strong creep resistance

Active Publication Date: 2010-11-17
英特派铂业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of thermocouple wire can be used under high-temperature oxidation conditions, and the temperature can be measured in the temperature range of 300-1400°C. However, the platinum pole grains of this kind of thermocouple wire are easy to coarsen, and the anti-pollution ability is poor, causing the thermoelectric potential to be unstable. , shorter service life, higher cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Pt 90%, Rh 10.0%.

[0027] Technical performance: the fracture life of ordinary platinum rhodium when subjected to the same stress at high temperature 10 Even wires are equivalent; for each roll of even wires, when the reference end temperature is 0°C, the thermal electromotive force measured at different test temperatures meets the requirements of GB / T 3772.

Embodiment 2

[0028] Embodiment 2: Pt89.82%, Rh9.98%, Zr0.1%, Y0.1%.

[0029] Technical performance: when subjected to the same stress at high temperature, the fracture life is as long as that of ordinary platinum rhodium 10 About 12 times that of even wire; for each roll of even wire, when the reference end temperature is 0°C, the thermal electromotive force measured at different test temperatures meets the requirements of GB / T 3772.

Embodiment 3

[0030] Example 3: Pt 89.64%, Rh 9.96%, Ti 0.2%, Y 0.2%.

[0031] Technical performance: when subjected to the same stress at high temperature, the fracture life is as long as that of ordinary platinum rhodium 10 About 11 times that of even wire; for each roll of even wire, when the reference end temperature is 0°C, the thermal electromotive force measured at different test temperatures meets the requirements of GB / T 3772.

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Abstract

The invention discloses dispersion strengthening platinum / rhodium10-platinum thermocouple wires, comprising a cathode and an anode; the thermocouple wires are characterized in that the anode contains ingredients according to the following weight percentage: 9.9-10% of rhodium; 0-0.5% of zirconium; 0-0.5% of yttrium; 0-0.5% of calcium; 0-0.5% of lanthanum; 0-0.5% of titanium; the excess is platinum; the cathode contains ingredients according to the following weight percentage: 0-0.5% of zirconium; 0-0.5% of yttrium; 0-0.5% of calcium; 0-0.5% of lanthanum; 0-0.5% of titanium; the excess is platinum. The production method of dispersion strengthening platinum / rhodium10-platinum thermocouple wires comprises mixing ingredients, vacuum melting, placing and rolling, oxidizing, combined machining and drawing forming. The dispersion strengthening platinum / rhodium10-platinum thermocouple wires of the invention enjoy long service life, high adaptive temperature, strong contamination resistance andlow use cost.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to a dispersion strengthened platinum rhodium 10 -Platinum thermocouple wire and its production method. Background technique [0002] Thermocouple wires are used to make various temperature measuring elements, and are widely used in temperature measurement in various fields such as the steel industry and the glass industry. Platinum rhodium is generally used in large quantities in the prior art 10 - Platinum thermocouple wire with a positive platinum rhodium 10 The nominal composition is rhodium Rh10%, platinum Pt is the balance, and the nominal platinum content of the negative electrode is 100%. This kind of thermocouple wire can be used under high-temperature oxidation conditions, and the temperature can be measured in the temperature range of 300-1400°C. However, the platinum pole grains of this kind of thermocouple wire are easy to coarsen, and the anti-pollution abili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/02C22C5/04C22C1/02
Inventor 杨志先尹俊
Owner 英特派铂业股份有限公司
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