Secondary Operations
A wide range of additional operations or treatments can be carried out on the parts after they have been sintered, these operation include:
Heat Treatment:-
Sintered parts may be heat treated to increase strength and also hardness for improved wear resistance.
Oil Impregnation:-
The controlled porosity of P/M parts permits their impregnation with oil and resin. This operation is used to give the part self-lubricating properties.
Resin Impregnation :-
Used to improve machinability, seal parts gas or liquid tight, or prepare the surface for plating.
Infiltration:
The porosity of P/M parts permits their impregnation with a molten metal.
Machining :-
All normal machining operations can be carried out on sintered components.
Drilling:-
Usually used for holes not in the direction of the pressing.
Burr Removal:-
Barreling is used to remove burrs and sharp corners.
Corrosion Resistance:-
Various types of surface treatment are available to increase corrosion resistance to withstand the most demanding of environments.
Sizing:
Cold pressing to improve dimensional accuracy.
Coining:
Cold pressing to press details into surface.
