B5_R furnace equipped with *COOL PLUS* process
*COOL PLUS* Sub-zero Cryogenic Treatment
The COOL PLUS technique, patented by SCHMETZ, is available for the entire BMI range of tempering furnaces (B5_R). This sub-zero treatment is ideal for stainless steels, high-speed steels, and tools, performed between quenching and tempering cycles.
Process:
- Uses liquid nitrogen injection, vaporizing within the heating zone to produce mixed gaseous nitrogen.
- Surface temperatures range between -40°C and -120°C.
- Fully automated and controlled for perfect reproducibility.
Benefits:
- Reduces residual austenite.
- Increases hardness and dimensional stability.
- Retains exceptional brilliance of treated parts.
- Reduces tempering cycle time and costs, enhancing competitiveness.
Example:
- X20Cr13 steel quenched at 1035°C and brought to -100°C achieves 690HV hardness, compared to 640HV without sub-zero treatment.
Technical Details
450 x 450 x 600 mm – 1000 x 1000 x 1800 mm
200 – 2000 kg
Mineral wool with stainless steel
10-2 mbar
Max 750°C, 900°C and down to -120°C
GRAPHTIL® man-machine interface
Cooling pressure: 1,2 bar abs
Forced convection heating under inert gas pressure
Heat Treatment Processes
- Tempering
- Annealing
- Stress relieving
- ALLNIT® low-pressure nitriding
- Nitrocarburising
Request a quote
We would like to send you a personalized offer tailored to your requirements.
You can reach us by phone, via e-mail or through our contact form.