Carborising

 

During cementation we enrich the carbon content of the surface of the low-carbon steel. During the process we heat up the steel in a medium containing atomicSAM_1629 carbon. The carbon diffuses into the surface of the part raising its carbon content. The size and carbon content of this coal-rich layer depends from the steel quality and the circumstances of the cementation. 

 

The cementing media may be solid, gaseous or fluid. We do the cementation in gas but cementing of smaller parts can be done in cementing carbon as well.  

 

The gas needed for the cementation is made from methanol, the exact regulation of the gas-composition is made with propane resp. with air. By knowing the temperature and the composition of the cementing gas we can determine the cementation time needed to the required depth of chill. 

The parts are mostly tempered from the furnace (direct tempering), but there is the possibility to let the parts cool down in a neutral gas, thus avoiding de-carbonating and cindering.

 

 

Advantages of gas-cementation:

  • fast
  • clean
  • balanced quality
  • reproducable

 

Average skin depth used: 0,8mm, but in special cases can be up to 2 mm