PENTA-7500S Belt Grinder
I
NSTRUCTION
M
ANUAL
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3601 E. 34th St. Tucson, AZ 85713 USA Tel. +1 520-882-6598 Fax +1 520-882-6599 email: [email protected] Web: https://www.metallographic.com
Please read this instruction manual carefully and follow all installation, operating and safety guidelines.
8
Preparation Stage
Purpose
Initial Documentation
•
Document the initial condition of the sample
•
Map the sample surface
•
Highlight the area of interest
Sectioning/Cutting
•
Reduce the size of large samples
•
Reduce sample size closest to the area of interest
Rough, or Planar
Grinding
•
Obtain a planar surface
•
Remove sectioning damage
•
Approach the area of interest
Rough Polishing
•
Remove all the subsurface damage and microstructural
damage produced during cutting and rough grinding
(superficial scratches may still be present after this step)
Final Polishing
•
Generally, more for cosmetic purposes than for removing
microstructural damage. In most cases, this stage should be
minimized to avoid over polishing and distorting the
microstructural features
Etching
•
To enhance microstructural feature such as grain boundaries,
grain size, phase differences, etc.
Examination
•
A variety of examination techniques are used in
metallography, including optical microscopy, electron
microscopy, and hardness testing
4.4 Metallographic Specimen preparation Basics
Typical metallographic specimen preparation consists of the following steps:
