Process for preparing metallographic lead sample and displaying structure

A sample and tissue technology, applied in the field of metallographic sample preparation, can solve problems such as difficult to master and complicated preparation process, and achieve the effect of simple preparation method and high definition

Inactive Publication Date: 2006-07-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its preparation process is st

Method used

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  • Process for preparing metallographic lead sample and displaying structure
  • Process for preparing metallographic lead sample and displaying structure
  • Process for preparing metallographic lead sample and displaying structure

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] Cut a sample along the radial direction of the lead protective sleeve for cables. The samples were ground as follows:

[0017] a. Coarse grinding: the sample is first subjected to 320 # Silicon carbide water sandpaper→600 # Grinding with silicon carbide water sandpaper, use water as lubricant. Then by 1000 # Silicon carbide water sandpaper→1500 # Silicon carbide water sandpaper→2000 # Sand with silicon carbide water sandpaper, and use ethanol as a lubricant at this time to avoid scratches. When grinding, the sample should be rotated 90 degrees in the same direction every time the sand paper is changed, and the surface of the sample should be observed with a microscope to determine the state of the grinding surface, ensuring that the direction of the scratches on the grinding surface at each step is in the same direction.

[0018] b. Intermediate grinding: Wash the roughly ground sample in an ultrasonic instrument, and polish it on a polishing cloth. At this time, ...

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Abstract

The invention provides a method to prepare lead metallic phase sample, which comprises: coarse grinding: using 320#-600# carbofrax emery paper and water as lubricant, then using carbofrax emery papers of 1000#, 1500# and 2000# to grinding; midst grinding: clearing the sample in supersonic device, polishing with polished cotton flannel; final grinding: clearing the sample in supersonic device, polishing the sample for 20-60s to drop 40ml H2O2+40ml CH3COOH etchant on new flannel; then, cleaning the sample, drying, and obtaining the final sample. This invention is simple but high definition.

Description

technical field [0001] The invention belongs to the technical field of metallographic sample preparation, and in particular provides a method for preparing lead metallographic samples and displaying structures, which is used for preparing metallographic samples of lead and lead alloys. It is a technology that is easy to operate and can effectively display the metallographic structure of lead. Background technique [0002] Due to the low hardness of lead, lead and its lead alloys are extremely soft, and will deform under low compressive stress, and when preparing metallographic samples, considerable surface flow and deformation will occur during grinding and polishing. The deformed structure will cover up the real structure and create false images, which will bring difficulties to the preparation of metallographic samples. The melting point of lead is low, and the recrystallization temperature is also low. In the process of grinding and polishing, its heat is enough to cause...

Claims

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Application Information

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IPC IPC(8): G01N1/28
Inventor 杨峰田文怀苏永安
Owner UNIV OF SCI & TECH BEIJING
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