Platinum-rhodium thermocouple fine wire material and preparation method for measuring molten steel temperature
A technology of molten steel temperature and thermocouple, applied in thermometers, measuring heat, thermometers with electrical/magnetic components directly sensitive to heat, etc. problems such as low yield, to achieve the effect of improving the yield of preparation, improving tensile strength and processing performance, and reducing costs
Active Publication Date: 2016-08-17
CHONGQING MATERIALS RES INST
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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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[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 13-platinum thermocouple fine wire material used for rapid temperature measurement of embodiments 1 to 3 is shown in Table 1
[0035] Table 1 Platinum rhodium 13-platinum thermocouple material composition table
[0036]
[0037]
[0038] Get each material described in table 1 embodiment 1-3, prepare the platinum-rhodium thermocouple micro-wire material for measuring molten steel temperature according to the following method respectively:
[0039] (1) High-vacuum intermediate frequency smelting: the raw materials of the components 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 1850-1910°C, and it is filled with argon p...
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The invention relates to a platinum-rhodium thermocouple fine wire material for measuring temperature of molten steel and a preparation method thereof. The material comprises a positive pole PtRh13 material and a negative pole Pt material. The positive pole PtRh13 material comprises the following components in parts by weight: 86.9-87.1 parts of platinum, 12.9-13.1 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 Pt material comprises the following components in parts by weight: 99.9-100 parts of platinum, 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 matrix 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 measuring the temperature of molten steel 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, ac...
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IPC IPC(8): C22C5/04C22F1/14G01K7/04
Inventor 吴保安唐会毅刘庆宾汪建胜王云春陈小军罗凤兰陈兴汉
Owner CHONGQING MATERIALS RES INST