In steel cord, the diffusion stage is essential. It consists in the thermal diffusion of zinc and copper in order to build brass while making sure to have no loss in zinc and while conserving the breaking load of the wires as high as possible.

In the spirit of a revision of the actual lines, particularly while abandoning the plating with the cyanides, the sulfate-based plating baths are now getting the upper hand thanks to the existence of diffusion in fluidized bed.

This technique, launched in 1988 in Japan, has encountered such a success that currently 17 diffusion fluidized beds have replaced the old diffusion units with Joule or induction effect. So, if the diffusion fluidized bed can be considered as a master in any new steel cord line, it is not only thanks to its exploitation easiness but also thanks to the remarkable results that one can get with such equipment.

A 2.1

HIGH CARBON WIRE

STEELCORD

> PATENTING PROCESS
    + Austenitizing process
       - Austenitizing furnace
    + Quenching process
       - Lead quenching unit
       - Patenting fluidized bed
         Ecoquench
    + Simulation program
        -> optimize patenting process
> CHEMICAL TREATMENT PROCESS
    + Pickling bathes
> DIFFUSION PROCESS
    + Diffusion fluidized bed

BEADWIRE

LOW CARBON WIRE

OIL TEMPERED WIRE

STAINLESS STEEL WIRE

BATCH PROCESSED WIRES

COMBUSTION EQUIPMENT