The moulds, fully designed and constructed by us, make use of the
most modern working techniques.
The iron powder, that is the raw base material of the
different steel types, is added to alloying elements, such as
nickel, copper, carbon, molybdenum or other elements. To ease
the pressing a small doses of lubricant is added in order to
preserve the dies
The mixtures are poured automatically in a die comprising
bottom die and punches being in the shapes of the component to
be carried out. After compression the piece is stripped from
the bottom die by the coordinate movement of the different
members of a mechanical or hydraulic press. These presses put
into action appreciable stresses making possible to exert
pressures of 4 to 8 T./cm sq on the powders.
Bit is the heat treatment at controlled atmosphere that is
carried out in three stages: Preheating. (500° - 750°). The
lubricant is removed with the gradual rise in temperature in
this stage. Sintering. (1120° - 1250°). The stay of the parts
in this stage varies from 30’ to 60’. The so treated particles
bind in a coherent mass without melting and get their strength.
Cooling. The components are cooled gradually in this final
stage till reaching the room temperature.
If a very close tolerance or a high density is required, the
parts are sized into dies on hydraulic or mechanical presses.
Pressure varies from 6 to 8 T./cm sq.
The dimensional tested are carried out with methods identical
to the conventional ones used in the mechanical sector.
Checking and testing of the physical and mechanical