Pure magnesium metallographic tissue observation method

A technology of metallographic structure and pure magnesium, which is applied in the field of microstructure observation of metal materials, can solve the problems of difficult to clearly observe the metallographic structure of pure magnesium, poor corrosion effect, and difficult metallographic structure, so as to achieve easy popularization and use, and reduce dust Pollution and energy consumption, effects of shortening observation time

Active Publication Date: 2018-05-01
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the corrosion effect of these corrosive agents is not good, the metallographic structure after corrosion is difficult to display, and the metallographic structure of pure magnesium that is difficult to clearly observe,

Method used

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  • Pure magnesium metallographic tissue observation method
  • Pure magnesium metallographic tissue observation method
  • Pure magnesium metallographic tissue observation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment includes the following steps:

[0025] Step 1. Use 600 sequentially # 、1000 # , 2000 # and 5000 # Silicon carbide sandpaper is used to grind the surface of hot-rolled pure magnesium step by step to obtain a flat, scratched and fine-grained observation plane of hot-rolled pure magnesium; in the step-by-step grinding process, after each replacement of silicon carbide sandpaper, heat The observation plane of rolled pure magnesium is rotated 90° and then ground until the scratches of the previous grinding are removed;

[0026] Step 2. Use the first corrosive agent to etch the hot-rolled pure magnesium observation surface obtained in step 1 once, then rinse with alcohol, and then blow dry with a hair dryer; the first corrosive agent is calculated by volume by 5 parts by mass concentration It is composed of 68% nitric acid and 95 parts of water; the time of the first abrasion is 30s;

[0027] Step 3: Use the second etchant to perform secondary erosion on ...

Embodiment 2

[0044] This embodiment includes the following steps:

[0045] Step 1. Use 600 sequentially # 、1000 # , 2000 # and 5000 #Silicon carbide sandpaper is used to grind the surface of as-cast pure magnesium step by step to obtain a flat, scratched and fine-grained observation plane of as-cast pure magnesium; in the step-by-step grinding process, after each replacement of silicon carbide sandpaper, the cast pure magnesium The magnesium observation plane is rotated 90° and then ground until the scratches from the previous grinding are removed;

[0046] Step 2, using the first corrosive agent to scratch the cast pure magnesium observation surface obtained in step 1, then rinse it with alcohol, and then dry it with a hair dryer; the first corrosive agent is calculated by volume by 5 parts by mass concentration. The nitric acid of 68% and the water of 95 parts are formed; The time of described one abrasion is 30s;

[0047] Step 3, using the second corrosive agent to carry out second...

Embodiment 3

[0051] This embodiment includes the following steps:

[0052] Step 1. Use 600 sequentially # 、1000 # , 2000 # and 5000 # Silicon carbide sandpaper is used to grind the surface of cast-rolled pure magnesium step by step to obtain a flat, finely scratched pure magnesium observation plane; in the step-by-step grinding process, after each replacement of silicon carbide sandpaper, the cast-rolled pure magnesium The magnesium observation plane is rotated 90° and then ground until the scratches from the previous grinding are removed;

[0053] Step 2. Use the first corrosive agent to etch the cast-rolled pure magnesium observation surface obtained in step 1 once, then rinse with alcohol, and then dry it with a hair dryer; the first corrosive agent is calculated by volume by 5 parts by mass concentration It is composed of 68% nitric acid and 95 parts of water; the time of the first abrasion is 25s;

[0054] Step 3: Use the second etchant to perform secondary erosion on the observa...

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Abstract

The invention discloses a pure magnesium metallographic tissue observation method, which comprises the following steps of 1, sequentially using 600#, 1000#, 2000# and 5000# silicon carbide abrasive paper for performing grade-to-grade grinding on the surface of the pure magnesium to obtain a flat pure magnesium observation surface with the fine and dense scratching marks; 2, using a first corrosionagent for performing primary wiping corrosion on the pure magnesium observation surface; then, performing flushing by ethanol; next, performing dry blowing by an air blower; 3, using a second corrosion agent for performing secondary wiping corrosion on the pure magnesium observation surface subjected to the primary wiping corrosion treatment; then, performing flushing by ethanol; next, performingdry blowing by an air blower; 4, observing the blown and dried pure magnesium observation surface by a metaloscope. The abrasive paper scratch mark and dirty materials are removed through two-step wiping corrosion treatment, so that the pure magnesium metallographic tissue is clearly shown; the tissue form of the pure magnesium is accurately reflected; the process is simple; the control is easy;the method is suitable for being used for observing the metallographic structures of the pure magnesium in various forms such as the cast form, the cast rolling form, the hot rolling form and the heattreatment form.

Description

technical field [0001] The invention belongs to the technical field of metal material microstructure observation, and in particular relates to a method for observing the metallographic structure of pure magnesium. Background technique [0002] The microstructure of metal materials determines the mechanical and chemical corrosion properties of metal materials. Therefore, using metallographic technology to observe the metallographic structure of the metal can quickly judge the properties of the metal, so that the plastic deformation process and heat treatment process can be adjusted in time. The premise of metallographic observation is to use a suitable chemical etchant to reveal the microstructure. At present, the commonly used corrosive agents for the observation of the metallographic structure of pure magnesium include aqueous solutions of nitric acid and alcohol, aqueous solutions of nitric acid and oxalic acid, and aqueous solutions of nitric acid and ethylene glycol. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G01N1/32
CPCG01N1/32G01N21/84
Inventor 张伟张于胜霍望图卢金文周宣李宇力马腾飞
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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