A method of welding iron steel electrodes facing removing weld metal

Abstract

The aim is to improve the quality of the weld metal during arc welding of cast iron.
The study was carried out at the cold welding of cast iron steel welding electrodes at a
constant current of reverse polarity.
Surfacing facing layer cutting steel wire electrodes with a maximum current of the following
mechanical removal of weld metal height of 0.5-0.7 with a further alternate cutting steel welding
electrodes, and the following mechanical removal of 0.3-0.5 height of each layer of weld metal to
cutting the metal filling and provide strengthening seam 2-3 mm.
During welding, the base metal was controlled temperature okoloshovnіy area, avoiding
parts heating above 70 ° C. Removal of the weld metal wires, electric sander.
As a result of investigations since the welds, cracking and other defects in welds and heataffected zone is not detected. The hardness of the weld metal does not exceed 180-200 HB and
makes it easy to carry out machining of welds conventional metal-cutting tools.
Multilayer filling cutting leads to annealing of the weld and reduce the hardness of the weld
metal and navkoloshovnoї zone, which reduces the likelihood of cracking.