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The word "Cryogenics" comes from two Greek words - 'CRYO' means 'cold' and 'GENICS' is 'born of'. The process works as follows - material is treated at below -190°C (-310°F). We use several different time/temperature profiles depending on certain variables like material composition, wall thickness and total mass being processed. The material is treated at this temperature in certain phased steps then and brought up to room temperature.

Before Cryogenic Treatment After Cryogenic treatment

At this temperature, in carbon-based metals three things happen.

 

  • First, the soft Austenite structure of the metal is almost (upto 99.7%) completely converted to tough Martensite structure.
  • Next, the existing carbon molecules are evenly dispersed.
  • Finally, many small carbide particles are created that fit between the existing larger carbon particles. Castings are stress relieved. The material alignment at the molecules level is enhanced.

 

While dimensions are not changed, the surfaces are smoothed. This smoothing of the surface is not visible. In other words, a matte finish does not become glossy. Many plastics become more uniform.

 

Metal parts become tougher, but less brittle because of their uniform structure. Metal items become more corrosion resistant due to the slight smoothing effect on the surfaces. Items show less resistance to electricity.

 

Items only have to be processed once. This is a permanent, irreversible process. So, everything from shaving blades to lawn mower blades to drills to cutting tools can be processed once and have the same benefits every time you have them reground or re-sharpened. Additionally, less material has to be removed, so you can expect up to twice the number of resurfacings before you have to replace the item. End-users and university lab testing indicates that parts can be machined to closer tolerances because the material is more inform and doesn't tend to "grab" the cutting tool. Early testing has indicated some thermal improvement in plastics. Our testing continues regularly in-house, with various reputed national laboratories and with our customers.

 

Benefits of Deep Cryogenic Processing


Cryogenic processing was developed by NASA for space applications. This technology has many benefits for industrial, commercial and consumer uses. The process is one-time, permanent and irreversible.

Benefits and Features of Cryogenic processing: among others...

  • Processed materials have increased wear resistance

  • Increased toughness, reduced brittleness, but are not harder

  • There is increase in impact resistance, fatigue limit

  • Their molecular structure is more uniform;

  • The material can withstand higher temperatures as heat dissipation is greater;

  • Processed items can be machined to closer tolerances with less scrap, distortion and stress;

  • Items that are re-sharpened or reground need less material removal;

  • Cryogenic processing saves you money with longer lasting equipment, reduced maintenance, reduced downtime and enhanced performance;

  • Cryogenic treatment is not a surface treatment; it is a solid treatment; the entire mass is affected thus the effect of the treatment is retained even after regrinding and re-sharpening.

  • Processed items are more corrosion resistant;

  • There is no change in hardness

  • Dimensional variations is about 5 to 10 microns depending on the prior Heat treatment

  • It works on any part that is coated like TiN (titanium-nitride), TiAlN, etc.