Sample preparation method of alloying hot-dip galvanized coating section transmission sample

A hot-dip galvanizing and alloying technology, applied in the field of transmission electron microscope analysis of alloy coatings, can solve the problems of high cost, demanding sample preparation conditions, and inability to effectively prevent the outer layer from loosening and falling off, so as to achieve the effect of preventing falling off.

Inactive Publication Date: 2013-09-18
SHOUGANG CORPORATION
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  • Application Information

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Problems solved by technology

At present, the method that can successfully prepare the section sample of the alloyed hot-dip galvanized layer is to use the focused ion beam (FIB) to etch the section sheet from the surface of the alloyed hot-dip galvanized sheet, but this method cannot effectively prevent the loose outer layer from falling off, and Strict requirements on sample preparation conditions and high cost

Method used

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  • Sample preparation method of alloying hot-dip galvanized coating section transmission sample
  • Sample preparation method of alloying hot-dip galvanized coating section transmission sample

Examples

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Effect test

Embodiment 1

[0016] Preparation of DX56D+Z alloyed hot-dip galvanized layer section transmission electron microscope sample

[0017] (1) Pre-cut sample: The thickness of the sample plate is 0.6 mm, and the inner diameter of the copper tube is 2.4 mm. According to the geometric relationship between the sample and the copper tube, the width of the sample is calculated to be 2.0 mm. The sample was cut into 2 strips of 2.0mm wide and 15mm long.

[0018] (2) Fix the sample: After gluing the two cut strip samples with G1 glue, let them stand on a hot stage at 130°C for 15 minutes until the glue is completely cured. Then put the copper tube into it and fix it with G1 glue, place it upright in the pit of the sample stage, and place it on a hot stage at 130°C for 15 minutes after the air bubbles are completely discharged.

[0019] (3) Slicing: Use a high-precision diamond grinding wheel to cut the copper tube vertically to obtain a disc with a thickness of 0.2mm and a diameter of 3.05mm.

[0020]...

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Abstract

The invention relates to a sample preparation method of an alloying hot-dip galvanized coating section transmission sample, and belongs to the field of transmission electron microscope analysis of alloy coatings. The sample preparation method comprises the following steps of: precutting an alloying hot-dip galvanized plate sample, and then fixing the precut sample in a copper pipe; and then cutting the copper pipe into slices along a radial direction, and carrying out thinning, final thinning and carbon coating to finally obtain an alloying hot-dip galvanized coating section film sample suitable for observation of a transmission electron microscope. The sample preparation method disclosed by the invention can be used for relatively easily and conveniently preparing the alloying hot-dip galvanized coating section transmission electron microscope sample and effectively protecting the outer loose phase by dint of G1 glue to prevent the desquamation.

Description

technical field [0001] The invention belongs to the technical field of transmission electron microscope analysis of alloy coatings, and in particular relates to a sample preparation method for cross-sectional transmission samples of alloyed hot-dip galvanized layers. Background technique [0002] Alloyed galvanized steel sheet (hereinafter referred to as GA steel sheet, Galvannealed Sheet Steel) has been more and more used in automobiles due to its excellent corrosion resistance, coating performance and welding performance, especially in Japanese series cars. The panels are basically made of GA steel plates. The so-called GA plate refers to the hot-dip galvanizing of the steel strip through the zinc solution with an aluminum content of 0.11% to 0.14%, followed by coating diffusion annealing, to obtain a zinc-iron alloy coated steel plate with a coating iron content of 7% to 15%. The zinc-iron alloy structure may contain Γ phase (Fe 3 Zn 10 -body-centered cubic structure);...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
Inventor 孟杨其其格鞠新华
Owner SHOUGANG CORPORATION
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