Method of displaying austenite structure quickly and easily

An austenitic and simple technology, applied in the inspection field of metallographic structure, can solve the problems of time-consuming, labor-intensive, electricity-consuming, and long-term use

Inactive Publication Date: 2009-11-25
WUXI HUANSHENG METAL PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1. It requires many instruments; 2. It takes a long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] The quick and simple method for displaying the austenite structure includes: first grinding the surface of the stainless steel strip to be inspected with metallographic sandpaper, so that the wear marks on the surface to be inspected are balanced and the directions of the wear marks are consistent; and then grinding with a polishing cloth The polished surface should be polished. After polishing, the surface should have no obvious scratches under a 100x microscope; then use a dropper to drop 1-50 drops of the prepared solution onto the polished surface. The surface is corroded, and the corroded surface is wiped with a soft fabric for 5-6 seconds, and finally rinsed with water and wiped clean with alcohol. The clean surface is placed under a microscope to observe the structure of austenitic stainless steel; the solution Use 36~38% HCl and 65~68% HNO by volume percentage 3 It is made by mixing in a volume ratio of 1:0.8 to 1.2.

[0010] Before grinding, the stainless steel str...

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PUM

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Abstract

The invention relates to a testing method of metallographic structure, particularly relates to a method of displaying austenite structure quickly and easily. According to the invention provided techniccal scheme, the method includes: first use metallographic abrasive paper to grind the surface to be tested of stainless steel strip until grinding crack on the surface to be tested is uniform and the grinding crack has same direction; then using polishing cloth to polish the grinded surface, and there should be no obvious scratch on the surface when observing under 100X microscope after polishing; then using burette to drop 1-50 drops prepared solution on the polished surface for etching the surface, using soft cloth to wipe etched surface for five to six secondes, at last washing with water and using alcohol to wipe clean, putting clean surface under microscope to observe austenite stainless steel structure. Using the method can checkout matrix structure of materials in short time.

Description

Technical field [0001] The invention relates to a metallographic structure inspection method, in particular to a quick and simple method for displaying austenite structure. Background technique [0002] In the production of cold-rolled stainless steel industry, it is often necessary to inspect the metallographic structure of metal materials to determine the matrix structure in the metal material, and then obtain predetermined mechanical properties by appropriately adjusting the composition and process parameters of various alloying elements. In the inspection, the electrolysis method of 10% oxalic acid aqueous solution is generally used. The surface of the material after grinding and polishing is immersed in the oxalic acid aqueous solution, and after a period of time, the material is taken out and placed under a microscope to observe the matrix structure of the material. This method has the following shortcomings: 1. It requires many instruments; 2. It takes a long time 3. It ne...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N1/32G01N21/84
Inventor 董有亮
Owner WUXI HUANSHENG METAL PRODS
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