Three-step process

Grain flow orientation criteria

Close die process is used to be competitive and versatile, due to its closed and interchangeable dies, avoiding a loss caused by the machining losses. The dies orientation, located aside the shaft, allows IRIZAR to produce items according to strict standards, with establishing required dimensions to the shaft, eye hole…
Open die forging process, is useful as a preparation of pre-forms with a total flexibility to shape (weights and dimensions) later to be stamped with proper tools adapted to pieces produced according to the requirements. The open die forging process is the most ancient type of forging and it is so termed due to the metal’s deformation not limited (free–forged) by its shape or mass.

The beneficial effects produced by HOT-FORGE are at least 5 compared to other non-forged materials:

  • * Reduction of the final forging, in case of lifting hooks for cranes of 1:5
  • * Creation of grain flow, due to molecular alignment and arrangement.
  • * Grain flow orientation. The mechanical properties of the product improve considerably if the effort is applied in the direction of the formed fiber and worsened if it is applied in perpendicular direction.
  • * Refining of the grain, in order to guarantee the mechanical values after the thermal treatment.
  • * Elimination of cavities, porosity, blowholes… Due to the huge pressure the material is subjected during the forging process, it is compacted and such undesirable characteristics are eliminated (at the same time, said huge pressures and displacements of the material could generate forging folds).