SURFACE HARDENING BY CARBURIZING (WITH CYANIDE BATH AND ATMOSPHERE CONTROLLED OVEN)

Carburizing Steel

These are alloyed or nonalloyed steels that contained low carbon that are used in the production of the parts which are demanded hard and abrasive resistant conditions on surface and softer and tough conditions in nucleus and are resistant to changeable strokes. The getting these properties to work parts is been by diffusioning carbon onto the part surface.

Carburizing

Carburizing is one of the oldest and common surface hardening methods. This process is the increasing process the carbon amount of the steel with diffusioning carbon atoms onto surface and done in two steps as carburizing and hardening in a cold material (liquid or air). Carbon diffusioning comes into being after chemical reaction with heating the part to ostenite phase in a zone that contains carbon. Usually it is used temperature of 900 – 950 °C and it is called carburizing temperature. Diffusioning depth of carbon can be determined with process temperature and process time.
After carburizing, steel part is hardened from carburizing temperature to room temperature in a suitable material (oil, water, warm solution), and tempered.