In this type of process metallic chromium and pure carbon in the form of graphite are loaded into a ball mill and ground into a fine powder.
Hot isostatic pressing utilizes an inert gas, primarily argon, in a sealed oven.
Decreasing the percentage of carbon content in the initial mixture results in an increase in the yield of the Cr7C3, and Cr23C6 forms of chromium carbide.
[7] Another method for the synthesis of chromium carbide utilizes chromium oxide, pure aluminum, and graphite in a self-propagating exothermic reaction that proceeds as follows:[7] In this method the reactants are ground and blended in a ball mill.
This mixture is then heated to very high temperatures and sprayed onto the object being coated where it forms a protective layer.
These are prefabricated chromium carbide-coated steel plates, which are meant to be welded onto existing structures or machinery in order to improve performance.
Cr3C2 prevents large grains from forming in the composite, which results in a fine-grained structure of superior hardness.
Undesired formation of chromium carbides in stainless steel and other alloys can lead to intergranular corrosion.