Process for manufacturing metal parts by free forging and drop forging in a press
AssigneesCommissariat a l'Energie Atomique, Thomson-Brandt Armements
InventorsDominique Broussoux, Jean Collard, Marie-Therese Daumas
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Abstract
The process for manufacturing parts of revolution which are made from a high-density metal with great regularity of reproducibility, especially as regards the homogeneity of the matter. It consists in carrying out the following steps: forging in three dimensions by successive upsetting and drawing-out operations carried out in three perpendicular directions; closed-die forging; and recrystallisation heat treatment. Application to the manufacture of hollow-charged coatings made of tantalum.
Claims11
Process for manufacturing metal parts by free forging and drop forging in a press, starting from billets, each of which is associated with an orthogonal mark having three dimensions (X, Y, Z), the process comprising the following steps:
- a first upsetting along the first axis (X) (FIG. 1);
- a first drawing out (FIGS. 2A to 2F);
- a second upsetting (FIG. 3);
- a second drawing out (FIGS. 4A to 4G);
- a die forging (FIGS. 6A and 6B);
- and
- a recrystallization heat treatment,
- the process being characterized in that:
- the first drawing out is performed along the second axis (Y);
- the second upsetting is performed along the second axis (Y);
- the second drawing out is performed along the third axis (Z).
Dependencies are inferred from the claim text.