Solid welding wire cored, flux cored gas shielded welding and self-protection, can refer to the following information Classification flux cored wire flux cored wire different situation with different classification methods. Protection of gas protection (CO2, rich Ar gas mixture) can be divided into two kinds of self-protection. Can be divided into small diameter (2.0mm) and coarse (2.0mm) diameter wire diameter. Wire cross-section can be divided into simple sections and complex section. By the use of power can be divided into exchange steep drop characteristics power and DC power. Filler material can be divided into the slagging type flux cored wire (titanium oxide, titanium calcium type calcium fluoride type) and metal cored flux cored wire. From the perspective of the development and application of the flux-cored wire can be classified as follows: The the slagging type gas shielded flux cored wire can be divided into CO2 gas shielded flux cored wire, the main varieties used for carbon steel, low-alloy structural steel of 50 kg (all position welding), high-strength steel (60-70 kg), low temperature Steel (-45 ° C, -60 ° C impact toughness), heat-resistant steel (1.25Cr-0.5Mo Department, 2.25Cr-1Mo Department), weathering steel (coating and non-coating), stainless steel (welded SUS304, 304L, 316 the the, 316L, 317,317 L, 321,347,309 S stainless steel), hardfacing (Hv250, Hv350 Hv450 Hv 600). The the slagging type gas shielded flux cored wire can be divided into rich Ar mixed gas shielded flux cored wire for carbon steel, the main varieties, 50 kilograms of low-alloy structural steel (all position welding), high-strength steel (60-70 kg) , low temperature steel (-45 ℃, -60 ℃ impact toughness), hardfacing (13Cr-2Ni Department). Metal powder core flux cored wire can be divided into CO2 gas shielded flux cored wire for carbon steel, the main varieties, 50 kilograms of low-alloy structural steel, high strength steel (60 kg class), hardfacing (high-Cr-Fe system , Hv800). Metal powder core flux cored wire can be divided into rich Ar mixed gas shielded flux cored wire for carbon steel, the main varieties, 50 kilograms of low-alloy structural steel, low temperature steel impact toughness (-60 ℃), stainless steel (13Cr-5Ni Department , 13Cr-4Ni-Mo system, 17Cr Department), hardfacing (13Mn, Department of 16Mn-16Cr Department). The main varieties of self-shielded flux cored wire for carbon steel, low alloy structural steel and hardfacing in the 50 kg class. The the main slag system overall seems flux cored wire is divided into self-shielded flux-cored gas-shielded flux cored wire, gas shielded flux cored wire is usually divided into two slag system, acidic and alkaline (T1 and T5). The acidic residue Department flux cored wire process performance is very good, all-position welding the type slag flux cored wire the typical efficient welding material shipbuilding industry is the most widely used. Better purification of alkaline flux cored wire weld metal, excellent process performance can be obtained through appropriate adjustment formula, suitable for flat welding, fillet welding position.