Patent ID: 6125913
Filing Date: 2000-10-03
Classification: B23K

Abstract:
A process for the aluminothermic welding of rail ends, comprising alumniothermically producing steel in a reaction crucible, pouring molten steel from the reaction crucible into a refractory mold which has an overflow and which surrounds the rail ends which are to be joined, and contacting alloying additives with that part of the steel which has run out of the reaction crucible to form the weld in the rail head region, which comprises alloying with the alloying additives after the completion of the aluminothermic reaction and separation of the steel from the slag while the steel runs into the casting cavity formed by the casting mold with the overflow in the mold being closed wherein the alloying with the alloying additives is carried out via an automatic thimble before the steel runs into said casting cavity and with said pouring of molten steel into said mold being designed as an uphill-pouring process.