ELECTROSLAG HARD-FACING OF FLAT SURFACES Russian patent published in 2010 - IPC B23K25/00 

FIELD: instrument making.

SUBSTANCE: proposed invention may be used for repair of worn-out flat surfaces and production of said surfaces by hard-facing. Current feed element 3 is arranged along crystalliser 1 edges in electrically insulating layer 2 to make an axially symmetric chamber in said crystalliser. To produce slag tanks, molten slag 11 is poured into aforesaid chamber so that slag tope surface exceeds lower end face of current feed element 3 by preset amount. Region of maximum heat release is produced in said slag tank nearby hard-facing metal formation zone. Two hollow non-melting electrodes 12 are arranged inside crystalliser, connected to independent current source and located at preset distance between their centers. Filler material 14 is fed into slag through cavity of each non-melting electrode 12. Built-up metal is cooled due to heat rejection towards opposite side of hard-facing surface with the help of 9.

EFFECT: higher quality of hard-facing.

2 dwg, 1 tbl, 1 ex