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Nitrided Steel Specimen Preparation

Metallographic etchant database

Nitriding is a heat treating process used for producig a very hard case (Vickers 1100) and is typically used to produce hard, strong, tough steels. The process involves heating heating the steel to 500-540°C (930-1000°F) in an atmosphere of ammonia gas for about 50 hours. No further quenching or heat treatment is required. The case depth is about 0.4 mm. Nitrided surfaces also can improve corrsosion resistance.

SECTIONING

MAXCUT Abrasive blade (Cat. No. MAX-E or MAX-I series)

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

POLISHING

Abrasive/surface

Lubricant

Force/ sample

Speed
(Head/base)

Time

120 micron diamond disk

Water

5-10 lbs

200/200 rpm

Until plane

9 um DIAMAT diamond on POLYPAD polishing pad

DIALUBE Purple Extender

5-10 lbs

200/200 rpm

3 minutes

3 um DIAMAT diamond on TEXPAN polishing pad

DIALUBE Purple Extender

5-10 lbs

200/200 rpm

3 minutes

1 um DIAMAT diamond on ATLANTIS polishing pad

DIALUBE Purple Extender

5-10 lbs

200/200 rpm

2 minutes

0.05 um Nanometer alumina on MICROPAD or MICROPAD 2 polishing pad

 

5-10 lbs

100/100 rpm

30 seconds


Metallographic micrograph of nitrided steel

Nitrided steel, 200X (BF), Etchant Picral

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