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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

AI Technical Summary

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 roughly the same, and it cannot be applied when the total composition of the solution sample and the metal sample are different.

Method used

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  • Method for analysis of metal sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Take the solid solution content sol.C of vanadium (V) in the steel sample V And the solid solution content rate sol.C of niobium (Nb) Nb A specific description will be given for an analysis example.

[0111] The steel certification reference materials shown in Table 1 were cut into appropriate sizes, and the surface was sufficiently ground, and analyzed by the method of the present invention and the comparison 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] Element

C

Si

Mo

V

Ti

Nb

other

(Fe)

JSS165-4

0.051

(0.01)

0.015

0.30

0.015

0.21

0.374

(99.04)

JSS1007-1

0.0024

0.006

0.030 ...

Embodiment 2

[0132] Hereinafter, for the solid solution content rate sol.C of titanium in the steel sample analyzed as Example 2 Ti example to explain in detail.

[0133] Two steel ingots having the compositions shown in Table 4 were prepared, heated at 1250° C. for 60 minutes, rolled at a working temperature of 1050° C., and then heat-treated under the conditions shown in Table 5. Next, after natural cooling, it was cut to an appropriate size and the surface was sufficiently ground, and then analyzed by the inventive method and the comparative method shown below.

[0134] In addition, the composition values ​​other than iron in Table 4 are values ​​analyzed by ordinary methods such as spark source emission spectroscopy, 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 the solid-solution titanium performed on each sample by the inventive method ...

Embodiment 3

[0160] Hereinafter, an example in which a steel sample is electrolyzed and a part of the electrolytic solution is collected and analyzed as Example 3 will be specifically described.

[0161] First, about 0.5 g of the steel certification standard material JSS1008-1 shown in Table 1 was used as an anode in about 300 ml of 10% AA-based electrolyte solution for constant potential electrolysis. About 1ml of electrolyzed electrolyte solution was collected, processed respectively by the method of the present invention and the comparative method as described below, and compared.

[0162] Invention method

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

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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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