Method, welding flux, and apparatus for electroslag welding

Details Method, welding flux, and apparatus for electroslag welding Method, welding flux, and apparatus for electroslag welding

B - Operations, Transporting

23

K

327/41

B23K 25/00 (2006.01) B23K 23/00 (2006.01)

Patent

CA 1162249

Abstract of the Disclosure The invention provides a method for electroslag weld- ing of light metals, which includes establishing a slag bath, fusing an electrode and edges to be weld-joined, and filling the gap between the edges with molten metal, the weld metal being held in a liquid state after switching off the welding current with concurrently increasing the slag bath heat capacity. The method employs a flux of the following composition (in wt. %): barium fluoride . . . . . . . . 60.0 to 90.0 calcium fluoride . . . . . . . 5.0 to 15.0 lithium fluoride . . . . . . . 0 to 5.0 sodium fluoride . . . . . . . 1.0 to 10.0 potassium fluoride . . . . . . 1.0 to 15.0 and an apparatus comprising a metal mould with a bottom plate, moulding shoes, a welding electrode, and a current contact member, the welding electrode being installed in an aperture in the centre of the bottom plate and the current contact member having a low electrical resistance being installed in the welding electrode fusion zone. The proposed electroslag welding method, flux, and apparatus allow a welded joint with a sound weld metal to be produced.

363847

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