Electroslag surfacing

Details Electroslag surfacing Electroslag surfacing

B - Operations, Transporting

23

K

32/30, 117/92

B23K 25/00 (2006.01) C23C 26/02 (2006.01)

Patent

CA 1313336

ABSTRACT A method and apparatus for electroslag surfacing of metal plate which utilizes a plate feeder assembly to which the plate is presented and which includes an elongate, horizontally disposed feeder table having an approach-end section and a runout-end section. The plate, with a major surface uppermost, is conveyed along the feeder table in a feeding direction from said approach-end section to said runout-end section, and is subjected to an electroslag operation at a surfacing installation located intermediate those sections to provide a cladding metal layer on that surface. At the surfacing installation, there is a flux mould arrangement under an electrode holder and feeder assembly having depending electrodes vertically in line with the interior of the mould arrangement. The plate is passed under the mould arrangement and the electrode holder and feeder assembly is vertically adjusted to bring a lower end of the electrode means into contact with the upper surface and to establish current flow. On establishing current flow, the electrodes then are raised to establish an arc between the electrodes and the uppermost surface, with charging of flux to mould arrangement establishing a molten slag pool which overlies that surface to submerge and extinguish the arc. Alloy powder material to said mould arrangement at the interface between the slag pool and the uppermost surface and melted in said mould arrangement to clad the uppermost surface as the metal plate is conveyed under the mould arrangement.

584821

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