US 2008/0156062 A1 · Punch for cold forming operations

Abstract

A cemented carbide tool containing tungsten carbide, titanium carbide, niobium carbide, possibly TaC, cobalt, chromium and possibly nickel, iron, molybdenum is disclosed. The composition of the materials provides a lighter material than usual, combined with a good resistance to corrosion as well as high hardness and wear resistance. These properties are particularly interesting for the manufacture of punch tools for cold forming operations. Cold forming tools made with these materials will have much better performance, particularly more steady performance and much longer lifetime. A method of cold forming and drawing, particularly deep drawing and ironing process of aluminum and steel beverage can manufacturing, is also disclosed.

Claims12

Dependent claims

A punch for manufacturing of aluminum or steel beverage cans, comprising a cemented carbide consisting essentially of, in wt-%:

70 to 90 WC having an average grain size of <2 μm;
2 to 8 TiC;
1 to 9 NbC;
0 to 3 TaC;
and
5 to 20 binder phase, wherein the binder phase includes, in wt-%, 10 to 98 Co, 0 to 50 Ni, 2 to 15 Cr, 0 to 50 Fe and 0 to 10 Mo.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/003,326Filed 21 Dec 2007

Priority

SE 0602813-827 Dec 2006

Published

3 Jul 2008

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

B21D 37/01
Tools as parts of machines covered by this subclass: selection of materials
B22F 5/00
Manufacture of workpieces or articles from metallic powder characterised by the special
C22C 29/08
Based on carbides, but not containing other metal compounds: based on tungsten carbide
B22F 2005/002
Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product: tools other than cutting tools

Punch for cold forming operations

Life of this patent

Punch for cold forming operations

Life of this patent

Abstract

Claims12