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1. (WO2008079083) POINÇON POUR OPÉRATIONS DE FORMAGE À FROID
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

Claims
1. Punch for manufacturing of aluminium or steel beverage cans of a cemented carbide consisting essentially of, in wt-%: 70-90 WC having an average grain size of <2 μm, 2-8 TiC, 1-9 NbC, 0-3 TaC, and 5-20 binder phase of, in wt-%: 10-98 Co, 0-50 Ni, 2-15 Cr, 0-50 Fe and 0-10 Mo.
2. Punch according to claim 1 wherein the cemented carbide consists essentially of, in wt-%: 75-85 WC, 2-6 TiC, 2-7 NbC, 0-1 TaC and 8-13 binder phase.
3. Punch according to claim 1 wherein the cemented carbide consists of, in wt-%: 70-90, WC, 2-8 TiC, 1-9 NbC and 5-20 binder phase consisting of, in wt-%: 25-60 Co, 35-50 Ni and 5-15 Cr.
4. Punch according to claim 3 wherein the cemented carbide consists of, in wt-%: 75-85 WC, 2-6 TiC, 2-7 NbC and 8-13 binder phase binder phase consisting of, in wt-%: 25-60 Co, 35-50 Ni and 5-15 Cr.
5. Punch according to claim 1 wherein the cemented carbide consists of, in wt-%: 70-90 WC, 2-8 TiC, 1-9 NbC and 5-20 binder phase consisting of, in wt-%: 10-30 Co, 5-15 Cr, 25-45 Ni, 25-45 Fe and 1-10 Mo.
6. Punch according to claim 5 wherein the cemented carbide consists of, in wt-%: 75-85 WC, 2-6 TiC, 2-7 NbC and 8-13 binder phase consisting of, in wt-%: 10-30 Co, 5-15 Cr , 25 - 45 Ni , 25 - 45 Fe and 1 - 10 Mo .
7. Punch according to claim 1 wherein the cemented carbide consists of, in wt-%: 70-90 WC, 2-8 TiC, 1-9 NbC and 8-14 binder phase consisting of, in wt-%: 95-97 Co and 3-5 Cr.
8. Punch according to claim 7 wherein the cemented carbide consists of, in wt-%: 75-85 WC, 2-6 TiC, 2-7 NbC and 9.5-12.5 binder phase consisting of, in wt-%: 95-97 Co and 3-5 Cr.
9. Use of a punch according to claims 1-8 for deep drawing and ironing operations of manufacturing of
aluminium or steel beverage cans.

drawing and ironing operations of manufacturing of a variety of other shaped articles, particularly tubular casings, such as dry cell battery casings and aerosol cans