Process for automatic fusion welding of rails

Details Process for automatic fusion welding of rails Process for automatic fusion welding of rails

1988-02-23

1989-06-20

Shaw, Clifford C.

Electric heating

Metal heating

Nonatmospheric environment at hot spot

219 73, B23K 2500

Patent

active

048411167

ABSTRACT:
A process for automatic fusion welding of rails by a combination of submerged arc welding and electroslag welding, comprising a root run for welding a rail base by submerged arc welding and, without interruption of the welding, subsequent runs for welding the rail base and welding a region from a rail web to a rail head by electroslag welding; wherein, during all of the runs, a metal mold is mounted on an upper surface of the rail base and a metal shoe is mounted on the metal mold to prevent an outflow of molten slag and molten metal and, during all of the runs, welding is performed by using a DC welding transformer having constant potential characterisitcs, a filler-wire having a diameter of from 1.2 to 2.0 mm, and a fused-type flux. The inventive process avoids the use of different fluxes and an alteration of welding machine conditions during the whole sequence of welding from the rail base through to the rail head.

REFERENCES:
patent: 4413169 (1983-11-01), Cameron
patent: 4575606 (1986-03-01), Safonnikov et al.

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