Definition: Carburizing increases the surface hardness of low carbon steel or low carbon alloy steel. While the core still retains the toughness

Relationship between carbon content in steel and carburizing




Carburizing program


Pre-heating process


Carburizing process



1. High temperatures increase the rate of carbon migration. If the temperature is too high, the microstructure of metal will be rough. Need to choose the right temperature.

2. High Cp% permeability increases carbon migration rate. If the permeability index is too high, it will produce soot, soot blacken the product and form a cementite precipitate…> Reduces mechanical properties

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