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A kind of preparation method of fine steel wire transmission electron microscope longitudinal section sample

A transmission electron microscope and thin steel wire technology, which is applied in the field of preparation of thin steel wire transmission electron microscope longitudinal section samples, can solve the problems of amorphous structure, affecting the reliability of analysis results, and difficult fine operation, etc., to achieve increased surface area and high success rate , low-cost effect

Active Publication Date: 2018-08-03
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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  • Application Information

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Problems solved by technology

However, this method is also difficult to finely operate, and long-term ion thinning will cause the matrix to form an amorphous structure during the bombardment of argon ions, which will affect the reliability of the analysis results.

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  • A kind of preparation method of fine steel wire transmission electron microscope longitudinal section sample
  • A kind of preparation method of fine steel wire transmission electron microscope longitudinal section sample

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with embodiment, and the schematic diagram that the sample is equidistantly tiled in the bottom flat mold is as follows figure 1 shown, but the examples should not be construed as limiting the invention.

[0016] (1) The sample is a drawn 82B high-carbon steel fine steel wire with a diameter of 0.8 mm and a structure of sorbite. The sample is cut into 5 initial samples with a length of 5-10 mm by a vise.

[0017] (2) Use the glued paper on the back of the waste sandpaper as the material, and cut it into figure 1 The open mold shown is 10mm x 10mm x 5mm in size, make sure the bottom of the mold is flat. Mix the cold mounting resin and curing agent at a ratio of 7:1 and stir slowly. The stirring speed should be such that no air bubbles are generated in the liquid. Take about 0.5mL and inject it into the mold. Spread on the bottom of the mold, the distance between each initial sample should be controlle...

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Abstract

The invention relates to a method for preparing a longitudinal section sample of a fine steel wire transmission electron microscope. The method comprises the following process steps: (1) the diameter of the fine steel wire sample is between 0.1 and 0.8 mm, and the sample is cut into a primary sample with a length of 5 to 10 mm. (2) Inject 0.5mL of curing glue into a mold with a flat bottom, spread the initial sample on the bottom of the mold at equal intervals of 0.6 to 1.5mm, and heat it to cure. Form a mold with a size of 10mm×10mm×5mm with an open mouth and a flat bottom; (3) separate the solidified sample from the mold, mechanically grind and polish the sample, and use a punch to punch out a small disc with a diameter of 3mm. The small disc has one and only one thin steel wire in its center; (4) Evenly coat the cured glue on the surface of the small disc with black grease that is insoluble in the double-spray electrolyte, and use the double-spray thinning method to obtain a suitable Samples observed with a transmission electron microscope. The method can be used for thin steel wires with a diameter of 0.1mm to 0.8mm, and has simple process, low cost, strong operability and high sample preparation success rate, and successfully solves the difficult problem of difficult preparation of thin steel wire longitudinal section samples for transmission electron microscopy.

Description

technical field [0001] The invention belongs to the technical field of material transmission electron microscope sample preparation, and relates to a method for preparing a thin steel wire transmission electron microscope longitudinal section sample, in particular to a preparation method for a transmission electron microscope longitudinal section sample of a thin steel wire with large axial deformation and a diameter ranging from 0.1 mm to 0.8 mm. . Background technique [0002] To use transmission electron microscopy to analyze the microstructure and other structures of iron and steel materials, it is necessary to prepare electron microscopy samples of moderate size and thickness. The microstructure of the steel wire after being drawn with a large amount of deformation changes greatly, but the macroscopic diameter is generally less than 3mm. The longitudinal section sample reflects the structural evolution of the material during the drawing process, but it is often very di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
Inventor 张珂金传伟洪慧敏董登超
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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