Metallographic Preparation Procedures - Iron

White Iron

Hard ferrous materials such as carburized steel or white iron are relatively easy to polish. The difficulty in preparing case hardened steels arise where polishing relief can occur between the hard coating and the soft matrix. This relief is minimized by keeping the final polishing time to a minimum.

SECTIONING

MAXCUT Abrasive blade (Cat. No. MAX-D series)

MOUNTING
Compression Mounting with Phenolic, Epoxy or Diallyl Phthalate compression mounting resins

POLISHING

Abrasive/surface

Lubricant

Force/ sample

Time

240 grit SiC paper
320 grit SiC paper
400 grit SiC paper
600 grit SiC paper
800 grit SiC paper
1200 grit SiC paper

Water
Water
Water
Water
Water
Water

5 lbs
5 lbs
5 lbs
5 lbs
5 lbs
5 lbs

Until plane
1 minute
1 minute
1 minute
1 minute
1 minute

3 um DIAMAT diamond on TEXPAN pad DIALUBE 5 lbs 3 minutes

1 um DIAMAT diamond on DACRON pad

DIALUBE Purple Extender

5 lbs

2 minutes

0.05 um Nanometer alumina on NAPPAD pad

 

5 lbs

30 seconds


Metallographic White Iron

White Iron - Hypo Eutectic, 1000X (DIC), etchant: Picral

White metal metallographic microstructure

White Iron - Hyper Eutectic, 200X (DIC), etchant: Picral

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