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Method for measuring content of carbon in vanadium-nitrogen alloy

A vanadium-nitrogen alloy, carbon content technology, applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve the problem that the carbon content of the vanadium-nitrogen alloy sample cannot be covered, the amount of pure iron flux added is large, and the quartz is easily damaged. Combustion tube and other problems, to achieve good social benefits, high recovery rate, good precision effect

Inactive Publication Date: 2015-10-07
INNER MONGOLIA BAOTOU STEEL UNION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adds 0.8g of pure iron as a flux to melt and burn when the reaction is violent, the splash is serious, and the combustion tube is easily damaged; After the sample is linearly corrected, the analysis result of the vanadium-nitrogen alloy standard sample is low
In the national standard GB / T24583.4-2009, 0.5g of iron, 0.2g of tin, and 1.5g of tungsten are added as flux, and the amount of pure iron flux added is large, which is easy to damage the quartz combustion tube; standardization calibration requires 2 standard samples of the same type, At present, there are few standard samples of vanadium-nitrogen alloys, only 2 or 3 varieties can not cover the carbon content in all vanadium-nitrogen alloy samples. The content of the alloy standard sample is close to ensure the accuracy of the analysis results

Method used

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  • Method for measuring content of carbon in vanadium-nitrogen alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The comparison experiments were carried out on different vanadium-nitrogen alloy samples using this method and combustion gas volumetric determination of carbon content. The results are shown in Table 1

[0061] Table 1 Samples using this method and combustion gas capacity to determine the carbon content value (%)

[0062] sample name

Embodiment 2

[0063] Embodiment 2: standard addition recovery

[0064] Take a certain amount of vanadium-nitrogen alloy standard sample, vanadium-iron standard sample, vanadium-nitrogen alloy 4#, 5#, 6# samples, add different amounts of barium carbonate respectively, measure under the same conditions according to this method, See Table 2.

[0065] Table 2 Different samples of the present invention measure recovery (%)

[0066] sample name

Embodiment 3

[0067] Embodiment 3: Precision experiment

[0068] Weigh and weigh a certain amount of vanadium-nitrogen alloy samples, operate according to the above method, measure and analyze 7 times under the same conditions, and calculate the standard deviation of the results. See Table 3.

[0069] Table 3 Multiple determination data of samples

[0070]

[0071] 5 Conclusion

[0072] The method invents and synthesizes standard samples of vanadium-nitrogen alloys by self-made, can make standard samples of vanadium-nitrogen alloys with different carbon contents, and successfully solves the problem that analysis requirements cannot be met without suitable standard samples. At the same time, one or more methods can be selected to correct the working curve of the instrument according to the actual situation, so as to ensure the accuracy of the analytical data and have good social benefits.

[0073] Choose to weigh 0.2000g sample, 0.3000g pure iron flux, 0.3000g tin flux and gently shake...

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Abstract

The invention discloses a method for measuring the content of carbon in vanadium-nitrogen alloy. The method includes adding 0.3000g of pure iron fluxing agents and 0.3000g of tin fluxing agents into fired special infrared crucibles for carbon and sulfur, covering the pure iron fluxing agents and the tin fluxing agents with 1.5g of tungsten powder, placing the special infrared crucibles in infrared carbon and sulfur instruments, selecting analysis channels according to contents of test samples, repeatedly measuring the test samples to obtain low and consistent reading numbers, recording the minimum three reading numbers, computing average values, inputting the average values into each instrument and allowing the instruments to electronically compensate blank values when the test samples are measured; standardizing and calibrating the instruments by the aid of self-prepared synthetic vanadium-nitrogen alloy standard samples; weighing 0.2000g of vanadium-nitrogen alloy test samples, adding 0.3000g of pure iron fluxing agents and 0.3000g of tin fluxing agents into the vanadium-nitrogen alloy test samples in the fired special infrared crucibles for the carbon and the sulfur, slightly shaking the special infrared crucibles to uniformly mix the vanadium-nitrogen alloy test samples and the fluxing agents with one another to obtain mixtures, covering the mixtures with 1.5g of tungsten powder, arranging the special infrared crucibles in the infrared carbon and sulfur instruments, measuring the vanadium-nitrogen alloy test samples and reading results. The set weights of the test samples are 1.000g. The method for measuring the content of the carbon in the vanadium-nitrogen alloy has the advantages of high accuracy, few required fluxing agents, low instrument damage and capability of meeting requirements on detection ranges for content of carbon in vanadium-nitrogen alloy.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgical analysis, in particular to an infrared absorption method for measuring carbon content in vanadium-nitrogen alloys. Background technique [0002] The current national standard GB / T20567-2006 uses the infrared absorption method to determine the carbon content in vanadium nitrogen alloys. Specifically, weigh 0.15g of the sample, add 0.800g of pure iron flux to the infrared carbon and sulfur analyzer for determination; choose calcium carbonate as the reference reagent or pig iron standard samples for linearity correction. This method adds 0.8g of pure iron as a flux to melt and burn when the reaction is violent, the splash is serious, and the combustion tube is easily damaged; After the sample is linearly corrected, the analysis result of the vanadium-nitrogen alloy standard sample is low. In the national standard GB / T24583.4-2009, 0.5g of iron, 0.2g of tin, and 1.5g of tungsten...

Claims

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Application Information

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IPC IPC(8): G01N21/3563
Inventor 卢艳蓉
Owner INNER MONGOLIA BAOTOU STEEL UNION