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Platinum-rhodium thermocouple fine wire material for quick temperature measurement and preparation method thereof

A technology of thermocouples and wire materials, which is applied in the field of precious metal materials, can solve the problems of poor control of strength and flatness, affect the control of steel smelting process, and low yield, so as to improve the yield of preparation, increase the tensile strength and Processability and cost reduction effects

Active Publication Date: 2014-07-30
CHONGQING MATERIALS RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the diameter of the fine platinum-rhodium wire used for domestic molten steel temperature measurement is usually The temperature cannot be measured more quickly, accurately and stably, which affects the process control of iron and steel smelting
At the same time, when preparing platinum-rhodium paired wire, the thinner the wire, the lower the yield rate due to poor strength and flatness is difficult to control

Method used

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  • Platinum-rhodium thermocouple fine wire material for quick temperature measurement and preparation method thereof
  • Platinum-rhodium thermocouple fine wire material for quick temperature measurement and preparation method thereof
  • Platinum-rhodium thermocouple fine wire material for quick temperature measurement and preparation method thereof

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the examples, but the present invention is not limited to the scope of the examples.

[0034] The proportioning of each component of the platinum-rhodium thermocouple micro-wire material used for rapid temperature measurement of embodiments 1 to 3 is shown in Table 1

[0035] Table 1 Platinum rhodium 30-platinum rhodium 6 thermocouple material composition list

[0036]

[0037]

[0038] Get each material described in table 1 embodiment 1-3, prepare the platinum-rhodium thermocouple micro-wire material for rapid temperature measurement respectively according to the following method:

[0039] (1), high vacuum intermediate frequency melting:

[0040] The raw materials of each component of the positive electrode prepared in step 1 are placed in a high vacuum intermediate frequency, and the vacuum degree is 1×10 -3 ~1×10 -5 Pa, the melting temperature is 1900-1980°C, and at the same time, it i...

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Abstract

The invention relates to a platinum-rhodium thermocouple fine wire material for quick temperature measurement and a preparation method thereof. The material comprises a positive pole PtRh30 material and a negative pole PtRh6 material. The positive pole PtRh30 material comprises the following components in parts by weight: 69.9-70.4 parts of platinum, 29.6-30.1 parts of rhodium, 0-0.003 part of yttrium, 0-0.003 part of zirconium and 0-0.003 part of cerium. The negative pole PtRh6 material comprises the following components in parts by weight: 93.8-94.1 parts of platinum, 5.9-6.2 parts of rhodium, 0-0.003 part of yttrium, 0-0.003 part of zirconium and 0-0.003 part of cerium. The yttrium, zirconium and cerium are dispersed in the material in the form of fine oxides. The oxides are represented by parts by weight of zirconium, yttrium or cerium. When the material is prepared into a platinum-rhodium couple wire, the minimum diameter is phi0.035mm, and the application range is phi0.035-0.07mm. The material has the advantages of high speed, accuracy and stability for temperature measurement, high reliability, high strength and the like.

Description

technical field [0001] The invention belongs to the field of precious metal materials, and in particular relates to a platinum-rhodium thermocouple fine wire material for rapid temperature measurement and a preparation method thereof. Background technique [0002] In the smelting industry, the requirements for measuring the temperature of molten steel are fast, accurate, and stable. Only when the above requirements are met can the precise control of the key processes of iron and steel smelting and processing be realized. The material used for temperature measurement of molten steel belongs to fast-consumption thermocouple material (referred to as fast couple material), which is mainly platinum-rhodium series thermocouple fine wire. The smaller the diameter, the faster the reaction time. At present, the diameter of the fine platinum-rhodium wire used for domestic molten steel temperature measurement is usually The temperature cannot be measured more quickly, accurately and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/04C22C1/02C22F1/14G01K7/02
Inventor 唐会毅吴保安刘庆宾汪建胜王云春陈小军罗凤兰陈兴汉潘勇
Owner CHONGQING MATERIALS RES INST
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