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Dispersion strengthening platinum/rhodium30-platinum/rhodium6 thermocouple wires and production method thereof

A technology of thermocouple wire and dispersion strengthening, which is applied in the direction of directly heat-sensitive electric/magnetic element thermometers, heat measurement, and electric devices, etc., which can solve the problems of high investment and use costs, easy grain coarsening, Poor anti-pollution ability and other problems, to achieve the effect of stable thermoelectric potential, strong creep resistance, and thin diameter

Active Publication Date: 2009-10-21
英特派铂业股份有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Thermocouple wire is used to make various temperature measuring elements, and is widely used in temperature measurement in various fields such as steel industry and glass industry. Platinum rhodium is widely used in the prior art 30 -platinum rhodium 6 Thermocouple wire, its positive platinum rhodium 30 The nominal composition is rhodium Rh30%, platinum Pt is the balance, negative platinum rhodium 6 The nominal composition is rhodium Rh6%, and platinum Pt is the balance. This kind of thermocouple can measure temperature in the temperature range of 1100-1700 °C, and can be used under high-temperature oxidation conditions, but platinum-rhodium 6 The crystal grains are easy to coarsen, and the anti-pollution ability is poor, causing thermal potential instability, limited service life, high investment and use costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Pt 94.0%, Rh 6.0%.

[0029] Technical performance: The fracture life when subjected to the same stress at high temperature is the same as that of ordinary platinum rhodium 6 Even wire is equivalent; for each roll of even wire, when the temperature of the reference end is 0℃, the thermoelectromotive force measured at different test temperatures meets the requirements of GB / T 2902.

Embodiment 2

[0030] Example 2: Pt 93.812%, Rh 5.988%, Zr 0.1%, Ca 0.1%.

[0031] Technical performance: The fracture life when subjected to the same stress at high temperature is the same as that of ordinary platinum and rhodium 6 About 20 times that of even wire; for each roll of even wire, when the temperature of the reference end is 0°C, the thermoelectromotive force measured at different test temperatures meets the requirements of GB / T2902.

Embodiment 3

[0032] Example 3: Pt 93.624%, Rh 5.976%, Zr 0.2%, La 0.2%.

[0033] Technical performance: The fracture life when subjected to the same stress at high temperature is the same as that of ordinary platinum and rhodium 6 About 15 times that of the even wire; for each roll of the even wire, when the temperature of the reference end is 0°C, the thermoelectromotive force measured at different test temperatures meets the requirements of GB / T2902.

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Abstract

The invention discloses dispersion strengthening platinum / rhodium30-platinum / rhodium6 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: 30% of rhodium; the excess is platinum; the cathode contains ingredients according to the following weight percentage: 5.94-6% 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 production method of dispersion strengthening platinum / rhodium30-platinum / rhodium6 thermocouple wires comprise mixing ingredients, vacuum melting, placing and rolling, oxidizing, combined machining and drawing forming. The dispersion strengthening platinum / rhodium30-platinum / rhodium6 thermocouple wires of the invention enjoy long service life, high adaptive temperature, strong contamination resistance and low use cost.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to a dispersion-strengthened platinum-rhodium 30 - Platinum Rhodium 6 Thermocouple wire and method for producing the same. Background technique [0002] Thermocouple wires are used to make various temperature measuring elements, and are widely used in temperature measurement in the steel industry, glass industry and other fields. Platinum and rhodium are widely used in the existing technology. 30 - Platinum Rhodium 6 Thermocouple wire, its positive electrode platinum rhodium 30 The nominal composition is rhodium Rh30%, platinum Pt is the balance, and the negative electrode is platinum and rhodium 6 The nominal composition is rhodium Rh6%, and platinum Pt is the balance. This thermocouple can measure temperature in the temperature measurement range of 1100 ~ 1700 ° C, and can be used under high temperature oxidation conditions, but platinum rhodium 6 The polar grains are...

Claims

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Application Information

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IPC IPC(8): G01K7/02C22C5/04C22C1/02
Inventor 蒋正荣尹俊
Owner 英特派铂业股份有限公司
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