FLUX FOR ELECTROSLAG WELDING OR WELDING BUILD-UP IN PARTS RECOVERY OR FOR ELECTROSLAG REMELTING Russian patent published in 2011 - IPC B23K9/04 B23K35/36 C22B9/18 

FIELD: metallurgy.

SUBSTANCE: invention can be used for recovery of worn out parts, e.g. car or locomotive coupler socket crosspieces, and production of high-quality tool steels by electroslag remelting. Flux comprises calcium fluoride as slag liquefier, reducer and scheelite concentrate as doping and slag-forming component that includes tungsten oxide in amount of 55-72, iron oxide in amount of 10-25, manganese oxide in amount of 2-10, and silicon oxide in amount of 3-8. Reducing agent represents ferrosilicon at the following ratio of components in wt %: ferrosilicon - 9-20, calcium fluoride - 10-28, sheelite concentrate making the rest.

EFFECT: higher strength of steel, reduced content of tungsten in wastes.

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