Welding under different circumstances, three classification methods: Classification of welding rod use classification, according to the classification of the main chemical ingredient of the drug skin, drug skin melting slag characteristics. There are two forms of expression in accordance with the purpose of the electrode, a former Ministry of Machinery Industry prepared, welding can be divided into: structural steel electrode, heat-resisting steel electrodes, stainless steel welding rod, Welding Electrode, low temperature steel electrodes, cast iron electrode , nickel and nickel alloy rods, copper and copper alloys, aluminum and aluminum alloys and special purpose welding rod. National standards for carbon steel electrode, low alloy electrodes, stainless steel welding rod, Welding Electrodes, cast iron welding rod, copper and copper alloys, aluminum and aluminum alloys. Two there is no difference of principle, the former commercial grade, the latter model, said. Classified according to the chemical composition of the electrode drug skin, welding can be divided into: type electrode of titanium dioxide, titanium dioxide calcium electrode, ilmenite type electrode, the iron oxide type electrode, cellulose type electrode, low hydrogen type electrode graphite electrode and the base electrode. According to the melting of the electrode drug skin characteristics of the slag to classification, welding can be divided into acid electrode and alkaline welding rod. The main ingredient of the drug skin acid electrode for acidic oxides such as silica, titanium dioxide, ferric oxide, etc.. Alkaline electrode main ingredient of the drug skin as alkaline oxides, such as marble, fluorite, etc.
Most of the wire to fall into this category, including carbon steel wire, low alloy steel wire, alloy steel wire, stainless steel wire and non-ferrous metal wire. Common wire: SKD11.> 0.5 ~ 3.2mm of HRC 56 to 58 weld up the cold steel, metal stamping die, cutting mold, tool, molding, workpiece stiff dough produced with high hardness, wear resistance and toughness, argon welding rod, Welding Electrode complement the heated warm-up before, or prone to cracking phenomenon. 63 degree blade edge wire> 0.5 to 3.2mm HRC 63 ~ 55, mainly used in high-speed steel welding pull the knife mold, hot high hardness with mold, forging the total modulus, thermal die, screw mold, wear stiff dough. knife-edge repair. Of SKD61> 0.5 ~ 3.2mm of HRC 40 ~ 43 welding zinc, aluminum die-casting mold, with good heat resistance and resistance to cracking, hot die, aluminum and copper hot forging dies, aluminum and copper die-casting mold, with good heat resistance, grinding, resistance to cracking. The tortoiseshell crack like normal hot pressing molds often, mostly caused by thermal stress also caused due to surface oxidation or corrosion of the die casting raw materials, the heat transferred to the appropriate hardness to improve their life, the hardness is too low or too high NA. 70N> 0.1 ~ 4.0mm wire features of purposes: high hardness steel joint, zinc and aluminum die-casting mold cracking, welding reconstruction, pig iron / cast iron welding repair. Direct surfacing a variety of cast iron / cast iron materials, can also be used as a mold cracking of welding cast iron Welding Wire, as far as possible the current lower part of the warm-up with a short distance from arc welding, steel, welding heating and slowly cooling. 60E> 0.5 ~ 4.0mm Features and Applications: Special welding of high tension steel of joint stiff dough production of bottoming, the cracking of the weld. High-strength wire, nickel and chromium alloy components, professional used to prevent rupture of the welding of the bottom, fill the base with high tensile strength, and can repair the steel weld cracking phenomenon. Tensile strength: 760 N / mm 2 ting elongation: 26% 8407-of H13> 0.5 ~ 3.2mm of HRC 43 ~ 46 system of zinc, aluminum, tin and other non-ferrous alloy and copper alloy die-casting mold can be used as hot forging or stamping mode. High toughness, good wear resistance and anti-hot-melt erosion resistance, resistance to high temperature softening, anti-high temperature fatigue resistance, can weld up the heat for the punch, reamer, rolling knife, grooving knives, scissors ... do the heat treatment the need to prevent decarburization, heat tool steel after welding, the hardness is too high to rupture.