Group 1
Low carbon steels are the most suitable for fineblanking
and are usually processed without any special heat treatment.
Group 2
Unalloyed steels can be fineblanked with a carbon content
of up to 1 % with a spheroidal cementite structure (90 - 100
%). If the carbon content exceeds 0.1 %, a heat treatment
is necessary to achieve clean sheared edges.
Groups 3 + 4
Alloyed steels also need a structure with well formed carbides.
To avoid tears, the geometrical shape of the part should not
be too complex.
For fineblanking cold or hot rolled steels are used. If necessary,
cold rolled stock can be rolled to a higher strength after
annealing. The scale on hot rolled material has to be removed
by pickling. |
Fineblank
Quality Steels
