COLDfire Thermal Cycling - How it Works

The method, called Thermal Cycling, subjects tools and parts placed in a specially constructed chamber to temperature ranges of minus 350 degrees F (- 215 degrees C) to as high as + 350 degrees F (+ 180 degrees C)  for a number of hours

The entire process takes between 12 and 24 hours, depending on the type of material, application and the results being sought after. Today's state-of-the-art systems use a computer that duplicates the optimal program for your specific application. It carefully regulates the temperature change and brings a measure of consistency to the process.

The process supplements standard heat/quench tempering, completing metallurgical changes that heat treating begins. Under a computer's control, temperatures inside the Thermal Cycling chamber are brought down according to a prescribed time-table. Strict computer control and proper processing profiles for each application, ensure that optimum results will be achieved with no dimensional change or chance of thermal shock. 

This process is not a surface treatment; it affects the entire mass of the tool or component being treated, making it stronger throughout. This means the process keeps working even after extended product use. The hardness of the material treated is unaffected, while its strength and wear resistance is actually increased. 

The ultra-cold temperatures, below -350 degs. F (- 215 degrees C) will increase strength and wear life of all types of vehicle components, machine components and cutting tools. In addition, other benefits include reduced maintenance, repairs and replacement tools and components. 

COLDfire Thermal Cycling creates a favorable matrix throughout the part as opposed to a surface treatment. 

To get a favorable matrix we must have a "molecular realignment", "phase of electrons" and "transformation of austenite to martensite". In the complete transformation of retained austenite to martensite we have a formation of small carbide particles within the martensite matrix. This strengthens the material without changing the hardness (macro-hardness).

Although the hardness of metals does not increase with a static hardness tester after treatment, it does increase with a dynamic tester. The explanation for this is that the E modulus or elasticity has increased. Although its effects on metal composition are subtle and not visibly apparent, COLDfire Thermal Cycling produces results. By treating tools, it has shown a increase of durability, or "wear life" by 200% to 400%.


Computer controlled Thermal Cycling is a new benchmark in Tool, Die & Stamping, as well as all Cutting Tools and Saw blades, by effective enhancement of performance with increased durability, tensile strength and parts life. 

This is a significant saving to you or your company. This will give labour saving, increased utilization, lower inventory, reduced downtime, reduced scrap and increased safety. Your "PAYBACK" is cost saving that adds to higher profits.

COLDfire Thermal Cycling gives you decreased residual stress in tool steel or carbide, decreases brittleness, increases durability or wear life, dramatically increases weld strength, increases tensile strength, toughness and stability coupled with the release of internal stresses, elasticity has increased, increase of Carbide count, requires only one permanent treatment, increases abrasive wear resistance, eliminates thermal shock through a computer controlled process. 

Subsequent refinishing operations or re-grinds do not affect permanent improvements and forms micro fine carbide fillers to enhance large carbide structures. You will note an improved surface finish after regrind after a part has been Thermal Cycled. Look at your problem areas that are costing you money and down time.

Give the Thermal Cycling Process a chance to turn your costs to profits.

The inventor of Thermal Cycling, COLDfire USA, has been working with metallurgy and metal tempering since 1980, for the last 20 years. COLDfire USA has over 60 systems in operation in the USA, Australia, Japan and Europe. Thermal Cycling Technology is now available in South Africa.

If tools are to be used to their maximum life, the treatment of choice must be Thermal Cycling. Experience the difference with COLDfire.


Call us for your FREE trial of the COLDfire process

5 Rapid Street, Riverside Industrial Park, Nelspruit 1200, South Africa
PO Box 2063 Nelspruit, 1200, South Africa
Tel: 013 7524349 - Fax: 013 75 33468 - Tel: 0861 - COLDfire - email
Call us on  0861 - COLDFIRE
(South Africa Only - Standard Telkom Rates Apply)