Patent ID: 6227282
Filing Date: 2001-05-08
Classification: B23K

Abstract:
A process for aluminothermic welding of rail ends, comprising the steps of providing a refractory molds for surrounding the to-be-welded rail ends and including an overflow and a diverting plug fitted in an upper region of the mold covering a rail head of the to-be-welded rail ends for absorbing kinetic energy of a molten steel to be poured into the mold, and carrying alloying additives; aluminothermically producing the molten steel in a reaction crucible; and pouring the molten steel produced in the crucible over the diverting plug and into the mold,wherein the molten steel poured into the mold includes a rail head-forming portion; andwherein the process further comprises the step of contacting of only the rail head-forming portion of the molten steel with the alloying additives, which are carried by the diverting plug, after the rail head-forming portion has been separated from a slag and with the overflow being closed.