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High-precision nickel-chromium/copper-nickel thermocouple alloy wires

A thermocouple and alloy wire technology, applied in thermometers, measuring heat, and using electrical devices, can solve the problems of material waste and high production costs, and achieve the effects of reducing production costs, prolonging service life, and reducing waste

Inactive Publication Date: 2012-10-17
JIANGSU HUAXIN ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the needs of customers, it can only be selected, which results in the production of a lot of products to select a part, which makes the production cost very high and causes waste of materials

Method used

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Examples

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Embodiment Construction

[0011] The present invention will be further described in conjunction with preferred embodiments now.

[0012] A high-precision nickel-chromium-copper-nickel thermocouple alloy wire has a positive conductor and a negative conductor. The positive conductor is a nickel-chromium alloy wire, and its chemical composition weight percentage is: chromium 9.5±0.02%, cobalt 1.0±0.02%, silicon 0.40 ±0.02%, calcium 0.05±0.005%, yttrium 0.05±0.005%, mixed rare earth 0.05±0.005%, carbon not greater than 0.04%, sulfur not greater than 0.005%, iron not greater than 0.05% and nickel in the balance; The above-mentioned negative electrode conductor is copper-nickel alloy wire, and its chemical composition weight percentage is: nickel 43.5±0.02%, manganese 0.4±0.01%, magnesium 0.16±0.01%, calcium 0.05±0.01%, carbon not greater than 0.1%, carbon not greater than 0.01% sulfur and the balance copper.

[0013] The specific process steps of the above-mentioned high-precision nickel-chromium-copper-ni...

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Abstract

The invention discloses high-precision nickel-chromium / copper-nickel thermocouple alloy wires and a production process thereof. A nickel-chromium thermocouple alloy wire comprises the components of chromium, cobalt, silicon, calcium, yttrium, carbon, sulfur, iron, nickel and a misch metal; a copper-nickel thermocouple alloy wire comprises the components of nickel, manganese, magnesium, calcium, carbon, sulfur and copper; and the process comprises the following steps of: (a), preparing raw materials; (b), performing vacuum melting; (c), performing hot rolling; (d), performing wire drawing and annealing; and (e), testing finished products, packaging the finished products to leave factory. The nickel-chromium / copper-nickel thermocouple alloy wires, which are produced according to a unique product formula and by the unique production process, can reach a high-precision I-grade level.

Description

technical field [0001] The invention relates to the field of alloy application, in particular to a high-precision nickel-chromium-copper-nickel thermocouple alloy wire. Background technique [0002] Nickel-chromium-copper-nickel thermocouple alloy wire is mainly used in the manufacture of E-type thermocouples. The stability of the E-type thermocouple and the size of the temperature measurement deviation mainly depend on the thermal electromotive force accuracy level of the nickel-chromium-copper-nickel thermocouple alloy wire, the national standard GB / T4993-2010 "nickel-chromium-copper-nickel (constantan) thermocouple "Wire" divides the thermal electromotive force accuracy grades into Ⅰ, Ⅱ, and Ⅲ grades. The E-type thermocouple made of high-precision grade I nickel-chromium-copper-nickel thermocouple alloy wire has the best stability and the smallest temperature measurement deviation. In the production process of various other factories in my country, due to the limitation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/02C22C19/05C22C9/06
Inventor 袁勤华袁鑫明
Owner JIANGSU HUAXIN ALLOY
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