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Method for analysis of metallic material

An analysis method and technology of metal materials, applied in the direction of testing metal components, analyzing materials, testing metals, etc., can solve problems such as no size classification analysis

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

[0019] As mentioned above, in the prior art, there are problems such as aggregation, and there is no practical and accurate size classification for precipitates in the range of submicron to nanometer size (especially 1 μm or less, more preferably 200 nm or less) analysis techniques

Method used

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  • Method for analysis of metallic material
  • Method for analysis of metallic material
  • Method for analysis of metallic material

Examples

Experimental program
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Embodiment 1

[0106] according to figure 1 In the order of (1) to (6) shown, the relationship between the titanium content in precipitates and the like and the zeta potential was examined. The specific conditions of each operation are as follows, but the present invention is not limited to the specific conditions described below.

[0107] Titanium-added carbon steel was used as a metal sample, and its chemical composition was: C: 0.09% by mass, Si: 0.12% by mass, Mn: 1.00% by mass, P: 0.010% by mass, S: 0.003% by mass, Ti: 0.18 Mass%, N: 0.0039 mass%.

[0108] electrolytic operation through image 3 The device structure shown was carried out, and about 300 ml of 10% AA-based electrolyte solution (10 volume % acetylacetone-1 mass % tetramethylammonium chloride-methanol) was used as the electrolyte solution.

[0109] As a dispersive solution, an aqueous solution of sodium hexametaphosphate (hereinafter abbreviated as SHMP) was used, and the concentration of SHMP was changed in seven steps...

Embodiment 2

[0115] In Example 2, the analysis method of the present invention (examples of the present invention) and the methods of Non-Patent Document 1 and Patent Document 3 (Comparative Examples 1 and 2) were used to analyze the titanium content in precipitates and the like in steel. Specific instructions.

[0116]A steel ingot having the composition shown in Table 1 was cut into three pieces to obtain sample A, sample B, and sample C. Sample A was heated at 1250°C for 60 minutes and then water-cooled. Samples B and C were heated at 1250°C for 60 minutes and then rolled at a finishing temperature of 950°C, and then heat treated under the conditions shown in Table 2. . After natural cooling, sample A, sample B, and sample C are all cut into appropriate size and the surface is fully ground, using the analytical method of the present invention (example of the present invention), the method of non-patent literature 1 (comparative example) 1) The method of Patent Document 3 (Comparative ...

Embodiment 3

[0142] according to figure 2 The particle size distribution measurement was performed in the order of (1) to (4) shown.

[0143] Carbon steel was used as a metal sample, and its chemical composition was: C: 0.10% by mass, Si: 0.2% by mass, Mn: 1.0% by mass, P: 0.024% by mass, S: 0.009% by mass, Cr: 0.03% by mass, Ti : 0.05% by mass. Then, these steels were cut into a size of 20 mm x 50 mm x 1 mm, and used as samples for electrolysis.

[0144] electrolytic operation through image 3 The device structure is carried out, and 500ml of 10% AA-based electrolyte is used as the electrolyte. The amount of electrolysis was performed at 0.1 g each time, and (3) to (4) were repeated 10 times. Sacrificial electrolysis (sacrificial electrolysis) for decontamination of the surface layer was performed only once before the electrolysis operation.

[0145] As the dispersion solution, a sodium hexametaphosphate aqueous solution having a concentration of 500 mg / l was used, and 50 ml was pre...

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Abstract

Disclosed is a method for analyzing a metallic material, which comprises the following steps: an electrolysis step of electrolyzing a metal sample in an electrolysis solution; a step of removing the metal sample from the electrolysis solution after the electrolysis is completed; a separation step of immersing the metal sample removed from the electrolysis solution in a dispersing solution which is different from the electrolyte solution and has dispersibility, thereby isolating at least one member selected from the group consisting of a precipitate and an intervening material adhered to the metal sample; and an analysis step of analyzing at least one member selected from the group consisting of the precipitate and the intervening material extracted in the dispersing solution.

Description

technical field [0001] The present invention relates to an analysis method for accurately analyzing the composition, particle size distribution, etc. of precipitates and / or inclusions in a metal sample. Background technique [0002] Precipitates and / or inclusions existing in metal samples, according to their shape, size and distribution, have a great impact on various properties of the material, such as fatigue properties, hot workability, cold workability, deep drawability, machinability or Electromagnetic properties, etc. have a significant impact. Hereinafter, precipitates and / or inclusions are referred to as precipitates and the like. Taking iron and steel as an example, especially in recent years, the technology of improving the properties of iron and steel products by using fine precipitates and the like has been remarkably developed, and along with this, the control of the precipitates and the like in the manufacturing process has become stricter. [0003] Precipita...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N33/20
CPCG01N33/20G01N2001/4088G01N27/42G01N5/02G01N33/2028G01N1/38G01N1/40G01N2001/383G01N2001/4038G01N33/202
Inventor 石田智治城代哲史山田克美野吕寿人佐藤馨
Owner JFE STEEL CORP
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