Cryogenic (Sub Zero) Treatment for Tool Steel
Cryogenic (Sub Zero) treatment process is the process in which, a ultra-low temperature of about – 196°C is used to treat the tool steel to enhance their desired metallurgical and mechanical properties. Ultra cold temperatures are achieved using computer controls, a well-insulated treatment chamber and liquid nitrogen (LN2). This process is completely eco- friendly and actually help reduce waste.
The treatment helps to remove retained austenite from the quenched components or tools. As a result, this increases the wear resistance of the tools or stabiles the component.
The entire process takes between 36 to 74 hours, depending on the weight and type of material being treated. Most importantly the process is not just a surface treatment, but it affects the entire mass of the tool or component being treated. Consequently, making it stronger throughout. In conclusion, the hardness of the material treated is unaffected, while its strength is increased.
Other benefits of Cryogenic Treatment include:
- Reduced maintenance, repairs and replacement of tools and components
- Reduced vibrations
- Rapid and uniform heat dissipation
- Improved conductivity
- Promotes a more uniform micro-structure
- Reduces abrasive and adhesive wear
- Permanently changes the structure of the metal resulting in improved machining properties
- Reduced coefficient of friction
- Easier machining, polishing and grinding for better edges and finishes
- Reduces catastrophic tool failures due to stress fracture
- Stress relieves to reduce inherent/residual stress caused by manufacture
- Reduce the frequency and cost of tool remanufacture
- Increases the overall durability of the treated product
