Thermal-Cryogenic Tempering of Tool Steel and Parts

What is thermal-cryogenic tempering and how does it improve the tensile strength of tool steel?

Thermal-cryogenic tempering is a process that involves the freezing of metal with a very controlled process which makes a denser, more uniform molecular structure and provides stress relief in the metal. This tempering with a cryogenic process makes the metal last longer and perform better. Deep cryogenic tempering at -300¡ changes the structure of the metal in the tool or part. Machining, grinding or other handling of the metal does not negate this structural change. Metal parts and tools only require one permanent treatment. The process transforms almost all soft retained austentite to hard martensite and forms microfine carbide fillers to enhance large carbide structures.

The strictly computer controlled process involves a deep-freeze method. Metal tools and parts are processed with cryogenic processing at 300¡ below freezing. Other deep-freeze methods process equipment to only -120¡. The Cryo-Processing takes metals beyond deep-freeze to cryogenic levels. "This significantly lengthens and enhances performance of metal tools and parts," says Mr. Lowell Kelley of 300¡ Below Freeze Cryogenic Tempering Services. "In fact, our Cryo-Processing treatment exceeds other heating and freezing methods  and increases a part's or tool's life by 200 to 400 percent."

A study was performed at the Louisiana Tech University on some tools, dies and metal parts. The percentage of wear increase after cryogenic tempering was from 121% improvement on Martensitic stainless steel to 817% on a high carbon/chromium die. A copy of this study results is available through 300¡ Below Freeze.

The thermal-cryogenic process can be used on tool steels, high grade aluminum, carbide, racing motors and high performance brakes. Engine, motor, and machine parts perform longer after cryogenic tempering. All types of tools have an increased useful life after cryogenic tempering.

The cryogenic process has been used by NASA, major auto companies and aircraft companies for several years and is now available throughout industry being used by companies both large and small.

"Cryogenic technologies are constantly improving. Knowledgeable information makes the difference in using this new technology," says Lowell Kelley.

      For more information contact:

      Lowell Kelley
      300¡ Below Freeze
      114 East Crestwood Drive
      Monett, MO 65708
      Phone/fax 417-235-8152