ExistMetallographic microscopeDuring use, to observe metal damage, fractures must be smoothed, polished, and chemically washed before they can be seen.
1. Process: Simply put, they are divided into categories:Sampling→Inlay→Polishing and polishing→Erosion→Observation and photography are five steps.
II. Notes:
a) Metallographic specimens should only be gently ground on the side of the grinding wheel. When the thickness of the test piece is less than 10mm should be polished after inlay.
b) It is strictly forbidden to replace sandpaper or abrasive cloth while the grinding machine is running.
c ) When grinding and polishing, hold the test piece tightly and strive for smooth contact with the polished surface. Two people may not operate on the same spinning disk at the same time.
d) Chemical reagents for corrosive and electrolytic metallographic test strips should be stored and stored according to their properties, and relevant regulations must be followed during preparation and use; During electrolysis, the temperature and current density of the electrolyte should be strictly controlled.
e) The operating room for metallographic corrosion and electrolysis should be well-ventilated and equipped with tap water and solutions for emergency neutralization in case of acid or alkali injury.
f) Waste liquid used in metallographic tests must be treated as necessary before discharge; untreated waste must not be discharged into the sewer.
g) During on-site metallographic testing, measures should be taken to prevent reagents and solutions from spilling and dripping; After completion, all debris and waste liquids should be cleaned up.
h) Switch to a horizontal typeMetallographic microscopeWhen using the arc photoelectrodeYesCut off the power.
