Sub-zero heat treatment

Sub-zero heat treatment

Sub-zero treatment of steels is a relatively new process that is gaining acceptance and is becoming increasingly popular. Cryo treatment in liquid Nitrogen of higher-alloy and carburized steels is an additional step in the heat treatment hardening process. It completes the metallurgical phase transformation of austenite into martensite during the hardening & creates conditions for the subsequent nucleation of very fine carbides in higher alloy steels.

Research shows that sub-zero processing of steels can improve various properties including:

  • Hardness and strength
  • Wear resistance
  • Dimensional stability
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