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Method for preparing electric silicon steel conductive metallographic phase sample

A sample preparation and sample technology, which is applied in the field of electrical silicon steel metallographic sample preparation, can solve the problems of material change, influence analysis results, long preparation time, etc., and achieve the effects of low cost, stable and reliable technology, and simple preparation.

Inactive Publication Date: 2014-07-02
李岩 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: ① When the sample is heated, the structure of the material will change to varying degrees, which will affect the analysis results
②It takes a long time to prepare the sample, and it takes about an hour for one sample, which is not conducive to batch preparation
③The conductive mounting material itself will also react with the electrolyte, which will affect the electrochemical polishing effect of the sample
④The price of the mosaic material is higher
The disadvantages of this method are: ①Because the electrical silicon steel samples are thin, generally between 0.2㎜~0.5㎜, and there is a layer of insulating paint on the surface, it is difficult to operate and the success rate is not high.
②It is difficult to clean up the residual electrolyte and the subsequent corrosion solution immersed in the gap between the mounting material and the sample, which may easily cause sample corrosion and pollute the analysis instrument

Method used

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  • Method for preparing electric silicon steel conductive metallographic phase sample
  • Method for preparing electric silicon steel conductive metallographic phase sample
  • Method for preparing electric silicon steel conductive metallographic phase sample

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Embodiment Construction

[0019] The invention provides a method for preparing a conductive metallographic sample of electrical silicon steel, the preparation steps of which are as follows:

[0020] ①Blanking and polishing the sample: punch sample 1 into a disc with a diameter of φ23㎜, and lightly polish one surface of sample 1 with 180Cw silicon carbide sandpaper or a file, so as to remove the insulating coating and expose the metal luster of the substrate. The area is 12㎜×12㎜;

[0021] ② Preparation of conductive electrodes: use 0.5mm thick and 6mm wide pure copper plates to press into such figure 1 , figure 2 For the concave conductive electrode 2 shown, the oxide layer on the surface of the copper plate can be lightly polished with 180Cw silicon carbide sandpaper;

[0022] ③Paste the conductive tape: place one end of the conductive electrode 2 vertically on the polished surface of the sample 1, and use a conductive tape 3 with a size of 8㎜×12㎜ to closely adhere the conductive electrode 2 to the ...

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Abstract

The invention discloses a method for preparing an electric silicon steel conductive metallographic phase sample. The method comprises the following steps: (1) blanking and polishing a sample; (2) preparing a conductive electrode; (3) binding a conductive adhesive tape; and (4) embedding. The method for preparing the electric silicon steel conductive metallographic phase sample provided by the invention has the advantages that the preparation is simple, convenient and rapid, the cost is low, the technique is stable and reliable, no special equipment is used, the method can be accomplished in an ordinary laboratory, and the embedded sample can be subjected to electrochemical polishing and metallographic phase, scanning electron microscope (SEM) and electron back-scattered diffraction (EBSD) analytical tests.

Description

technical field [0001] The invention relates to the technical field of metallographic sample preparation of electrical silicon steel, in particular to a method for preparing conductive metallographic samples of electrical silicon steel. Background technique [0002] Electrical silicon steel is widely used in various equipment such as transformers, generators, motors, choke coils, electromagnetic mechanisms, relays, and measuring instruments, and is the most widely used soft magnetic material in engineering. Electrical silicon steel is divided into two types: hot-rolled and cold-rolled. Hot-rolled electrical silicon steel has been basically eliminated due to poor electromagnetic properties and large losses. Electrical silicon steel is divided into oriented electrical silicon steel and non-oriented electrical silicon steel according to different grain orientations. Grain orientation distribution and microstructure are important technical indicators of electrical silicon steel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
Inventor 李岩董秀文
Owner 李岩
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