1.7220 | 34CrMo4 +Q Prior austenite grain boundaries
| Numeric designation | 1.7220 | 34CrMo4 +Q Ehemalige Austenitkorngrenzen |
|---|---|
| Chemical designation | 1.7220 | 34CrMo4 +Q Ehemalige Austenitkorngrenzen |
| State | +Q Prior austenite grain boundaries |
| Etching | PAG QT² |
The NOT tempered screw material (tetragonal martensite) was successfully etched onto former austenite grain boundaries using “PAG QT²”. The black coating is removed on a stationary, wet OPS disc (ChemTec).
Parameters:
- Etchant PAG QT² (made by Schmitz)
- 3+3 min (image)
- +3+1+5 min (image 2)
- Room temperature
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