Method for analysis of metal sample

A metal sample and analysis method technology, applied in the direction of testing metal components, preparation of test samples, testing metals, etc., can solve problems such as inapplicability

Active Publication Date: 2010-03-31
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, it can be seen from the premise of (1) above that the composition of the metal sample and the solution sample must be

Method used

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  • Method for analysis of metal sample
  • Method for analysis of metal sample

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0109] Example 1

[0110] Based on the solid solution content of vanadium (V) in the steel sample sol.C V And niobium (Nb) solid solution content sol.C Nb Give specific explanations for analysis examples.

[0111] The steel certification standard materials shown in Table 1 were cut into appropriate sizes, and the surface was sufficiently ground, and then analyzed by the present invention method and the comparative method shown below. In addition, the composition values ​​other than iron in Table 1 are certified values, and the composition values ​​of iron are calculated values ​​obtained by subtracting the total value of the composition values ​​of elements other than iron from 100%.

[0112] Table 1

[0113] quality%

[0114] Ingredients

[0115] Invention method

[0116] First, using about 300 ml of 10% AA-based electrolyte (10 vol% acetylacetone-1 mass% tetramethylammonium chloride-methanol), about 0.5 g of the above-mentioned steel sample was subjected to constant potential elec...

Example Embodiment

[0131] Example 2

[0132] Hereinafter, regarding the solid solution content of titanium in the analytical steel sample of Example 2, sol.C Ti The example is explained in detail.

[0133] Two steel ingots with the composition shown in Table 4 were prepared, heated at 1250°C for 60 minutes, rolled at a processing temperature of 1050°C, and heat-treated under the conditions shown in Table 5. Then, after natural cooling, it is cut to an appropriate size and the surface is sufficiently ground, and then analyzed by the invention method and the comparison method shown below.

[0134] In addition, the composition values ​​other than iron in Table 4 are obtained by analysis by ordinary methods such as spark source emission spectrometry, and the composition value of iron is obtained by subtracting the total value of the composition values ​​of elements other than iron from 100% Calculated.

[0135] In addition, the analysis of solid solution titanium for each sample was repeated four times b...

Example Embodiment

[0159] Example 3

[0160] Hereinafter, a concrete description will be given of an example in which a steel sample is electrolyzed and a part of the electrolyte solution is collected and analyzed as Example 3.

[0161] First, using the steel certification standard material JSS1008-1 shown in Table 1 as the anode, about 0.5 g of the material was subjected to constant potential electrolysis in about 300 ml of 10% AA-based electrolyte. Approximately 1 ml of electrolytic solution after electrolysis was collected and processed separately by the method of the present invention and the comparison method described below, and compared.

[0162] Invention method

[0163] Collect about 1 ml from about 300 ml of electrolyte into a test tube, add 0.4 ml of 0.1 mol / L diammonium ethylenediaminetetraacetic acid aqueous solution and dry. The residue was heated and dissolved in about 20 ml of pure water to obtain an analysis solution, which was introduced into an ICP mass spectrometer, and the ionic st...

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Abstract

Disclosed is a method for analyzing a metal sample. The method comprises: an electrolysis step of electrolyzing a metal sample containing a reference element and an element of interest in an electrolysis solution; a collection step of collecting a portion of the electrolysis solution; an analysis step of analyzing the collected electrolysis solution; a concentration ratio calculation step of calculating the ratio of the concentration of the element of interest to the concentration of the reference element in the electrolysis solution based on the results of the analysis; and a content calculation step of calculating the content of the element of interest present in a solid solution state by multiplying the calculated concentration ratio by the content of the reference element in the metal sample.

Description

technical field [0001] The present invention relates to an elemental analysis method in a metal sample, and more particularly to a method for quickly and accurately obtaining the content of an element existing in a solid solution state in a metal sample. Background technique [0002] Precipitates in metal samples, depending on their shape, size and distribution, have significant effects on various properties of materials, such as fatigue properties, hot workability, cold workability, deep drawability, machinability or electromagnetic properties. influences. [0003] Taking iron and steel as an example, in recent years, techniques for improving the properties of iron and steel products using fine precipitates have been remarkably developed. Accompanying this development, the control of precipitates in the production steps has become stricter. Added elements The content of elements present in a solid solution state and the content of elements present in a precipitated state ...

Claims

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Application Information

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IPC IPC(8): G01N33/20G01N1/28
CPCG01N33/20G01N2001/4038G01N33/202
Inventor 城代哲史石田智治
Owner JFE STEEL CORP
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