What is Carburizing? Carburizing is one of the most widely used methods, of case hardening. The purpose of case hardening is to increase the surface hardness of steel. In this process, the steel is introduced to a carbon-rich environment and elevated to a temperature range of 850 to 950 o C for a certain amount of time. Due to this Carbon starts diffused into the surface layer of the material. The rate of diffusion depends upon the time and temperature zone at which the material is maintained. After carburizing material is quenched so that the carbon is locked in the structure. The hardness is moderately increased, but it can be hardened again through flame or induction hardening. It’s possible to carburize only a particular portion of the component(i.e.., gear tooth). The hardness achieved by Carburizing is 55 to 68 HRC and the carbon content in the surface layer is increased to 0.75 to 1.2% The surface not to be carburized should be copper plated or covered with asbestos power mixe
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