Louisa Tchaicha (asker) Jun 5, 2014:

@Alison please post your suggestion :) Thanks for your help!

Johannes Gleim May 27, 2014:

@ Anca and Alison Very nice and convincing links.

Anca Florescu-Mitchell May 27, 2014:

Yes, Alison is right. E.g.

http://www.forgetechnology.com/electric

Alison MacG May 27, 2014:

électrorefoulage I think this is probably a reference to "électrorefoulage", i.e. electro-upsetting or electric[al] upsetting. See:

Technologies de forgeage
Généralités
Forge libre
Estampage
Matriçage
Extrusion
Laminage circulaire
Frappe à froid
Electrorefoulage - Cette technique permet d’obtenir à l’extrémité d’un lopin long une masse de métal importante qui sera ensuite forgée.
L’extrémité à déformer est seule chauffée, le lopin glisse dans l’électrode « entrée de courant ».
http://www.forgefonderie.org/electrorefoulage

Les techniques
Du point de vue industriel, le forgeage comporte sept techniques dérivées.
http://www.maisondesforgerons.fr/unpeudetechnique/

Machines de refoulage électrique
http://lasco.de/umformtechnik/index.php?page=1038
http://lasco.de/umformtechnik/electric_upsetters

Electrical Upsetting
A high current is passed into one portion of the material to be upset. Electrical resistance causes the component to heat up. Once this portion of the material reaches plastic state, cold material is pushed into the hot area via hydraulic force.
http://www.fpe.co.uk/processes/electrical-upsetting

Louisa Tchaicha (asker) May 27, 2014:

@clain yes I think this is very likely that it is a typo for électroforgeage
the second link has'nt opened yet, but it must be it, Thank you!
please put your suggestion in the "answer box":)