In many applications like gear tooth, splines and bearing surfaces, we only want the surface to be in a hardened state while the rest of the part (i,e, the interior region) to be ductile and tough to better handle shocks, cyclic loading (longer fatigue life) and momentary overloads. Which of the following statement are true: (possibly more than one option is correct).

Question

Answer

Surface needs to be shot peened to produce a layer with residual compressive stresses.

Answer

Part will also require quenching to achieve a hardened surface.

Answer

Part are soaked in a carbon rich environment at elevated temperatures for a significant amount of time to allow the carbon to seep into the surface resulting in the surface regions with a higher carbon concentration.

Answer

Case hardening will only be effective if the entire part is made of medium or high carbon steel.

Answer

Mild steel/Low carbon steel is the preferred cost effective option for case hardened parts.

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In many applications like gear tooth, splines and bearing surfaces, we only want...

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