1.7077 | 36CrB4 +QT 10.9
| Numeric designation | 1.7077 |
|---|---|
| Chemical designation | 36CrB4 |
| State | +QT 10.9 |
| Etching | PAG QT² und 3% Nital |
The 36CrB4 screw is in the quenched and tempered condition of property class 10.9. The micrographs show successful etching to the former austenite grain size using our specially developed etchant PAG QT². Various etch times are shown:
- PAG QT² (a): 3+3+15min
- PAG QT² (b): 3+3+15+180 min
- PAG QT² (c): 3+3+15+180 min+30s OPS
- 3% Nital 8 seconds
The microstructure is tempered martensite. This can be seen from the fine carbide precipitates.
The hardness is 322 HV 10 and the tempering temperature was approximately 530 °C.
