Patent ID: 9163360
Filing Date: 2015-10-20
Classification: B22C,B22D,B23K,E01B

Abstract:
1. A method for the aluminothermic welding of rails, wherein two rail ends to be welded are surrounded by a welding mould defining a moulding cavity, comprising the steps of: triggering a first aluminothermic reaction from a first aluminothermic charge in a crucible, casting a metal derived from said first aluminothermic reaction into the mould, so as to fill the moulding cavity starting from a foot of the rail, said method comprising, after filling of the mould cavity, a step to trigger a second aluminothermic reaction from a second aluminothermic charge above a rail head, and to cast a metal derived from said second aluminothermic reaction into the moulding cavity in the region of the rail head.