Special welding electrode for surfacing and repairing broken teeth of medium-load and medium-speed gear and its using method

Forged a medium speed gear teeth set off by special welding repair welding, weight percent of the chemical composition of its pharmacologically skin as wt%: Marble 25-35, 14-20 fluorite, Shi Ying 3-5, clay sub-2- 4, 4-6 carbon ferrochrome, ferromanganese 2-4 carbon, graphite, 3-5, 2-4 ferrosilicon, ferrotitanium 2-4, molybdenum 3-5, lanthanum oxide 4-6, metal Nickel 7-9, 6-8 carbon ferrochrome, ferrovanadium 3-5. H08A steel wire as the core wire. Need to repair broken teeth gears 200-300 ℃ preheating before welding use, post-weld tempering treatment at 100-200 ℃. Field The present invention is easy to use, easy to weld, cracking after welding, after welding, the surface hardness of the gear range HRC50 ~ 55, the service life of the repaired gear is 3-4 times the original gear.