What are the classification of wire 1, Welding Rod 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 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, 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. - The base wire anti-burst> 0.5 ~ 2.4mm HB ~ 300 high hardness steel of the joint backing of stiff dough production, the cracking of welding. High-strength welding support, nickel and chromium alloy components is high, used to prevent rupture of the underlying welding, fill primer, high tensile strength, and can repair the crack of steel welded together to rebuild. 718> 0.5 ~ 3.2mm of HRC 28 to 30 large household appliances, toys, communication, electronics, sports equipment, plastic products, mold steel. Plastic injection mold, die of heat-resistant, corrosion-resistant mold, cutting, Etched good, excellent surface gloss after grinding, long service life. Preheating temperature of 250 ~ 300 â„ƒ heat temperature of 400 ~ 500 â„ƒ for multi-pass welding of stoppage time, using the backward method welding repair more difficult to have a poor integration and defects. 738> 0.5 ~ 3.2mm of HRC 32 ~ 35 translucent and the surface luster of plastic products mold steel, large mold, the complex shape and the high precision plastic mold steel. Plastic injection mold, heat-resistant mold, corrosion-resistant mold, Etched good, with excellent processing properties, cutting polishing and electrical erosion, toughness and good wear resistance. Preheating temperature of 250 ~ 300 â„ƒ heat temperature of 400 ~ 500 â„ƒ for multi-pass welding of stoppage time, using the backward method welding repair more difficult to have a poor integration and defects. P20Ni> 0.5 ~ 3.2mm HRC 30 ~ 34 plastic injection mold, heat mode (bronze mold). Welding crack sensitivity of low-alloy composition design, approximately 1% of the nickel-containing, suitable for PA, POM, PS, PE, PP, ABS plastic, good polishing, welding, without pores, cracks, polished good finish, vacuum degassing, after forging, pre-hard-to of HRC 33 degree sectional hardness distribution uniform, die life of more than 300,000. Preheating temperature of 250 ~ 300 â„ƒ heat temperature of 400 ~ 500 â„ƒ for multi-pass welding of stoppage time, using the backward method welding repair more difficult to have a poor integration and defects. NAK80> 0.5 ~ 3.2mm of HRC 38 to 42 plastic injection mold, mirror steel. High hardness and excellent mirror effect, good electrical discharge machining, excellent welding performance, grinding, smooth as a mirror for the world's most advanced, most excellent mold steel, adding elements easy to cut, easy machinability, high strength and toughness and resistance to mill deformation characteristics, suitable for a variety of transparent plastic mold steel products. Preheating temperature of 300 ~ 400 â„ƒ heat temperature of 450 to 550 ° C, for multi-pass welding of stoppage time, using the backward method welding, and more difficult to have a poor integration and defects. S136> 0.5 ~ 1.6mm of HB 400 plastic injection mold, corrosion resistance and good permeability. High purity and high mirror degrees, polished good, excellent anti-rust, anti-acid and heat treatment variant, suitable for PVC, PP, EP, PC, PMMA plastic, corrosion resistance and easy processing of the modules and fixture, the super-mirror corrosion precision molds, such as the rubber mold, camera parts, lenses, case, etc.. Ace Steel> 0.5 ~ 2.4mm HB to 200 iron mold, shoe mold, mild steel welding, easy carving Etched, S45C, S55C steel and other patches. The fine, soft texture, easy to process, do not have pores, after the preheating temperature of 200 ~ 250 â„ƒ heat temperature of 350 ~ 450 â„ƒ. In BeCu (beryllium copper)> 0.5 ~ 2.4mm of HB ~ 300 high thermal conductivity copper alloy mold material, the main added element beryllium, suitable for plastic injection mold inserts, mold core, die-casting punch, hot runner cooling system, the thermal conductivity of the mouth, blow mold cavity, wear plate and so on. Tungsten-copper materials used in resistance welding, EDM, electronic packaging, and precision machinery and equipment. CU (TIG copper)> 0.5 ~ 2.4mm HB to 200 this welding support wide range of uses, you can weld up the electrolytic copper alloys, steel, bronze, pig iron, generally copper solder fill. Good mechanical properties, can be used for the copper alloy welding repair, can also be used for welding of steel and pig iron, iron joints. Oil steel wire> 0.5 ~ 3.2mm HRC 52 ~ 57 blanking die, gauge, die, perforated punch, can be widely used in the cold metal stamping, hand decorated with embossed molds for generic special tool steel, wear-resistant, oil-cooling . Cr steel wire> 0.5 ~ 3.2mm HRC 55 ~~ 57 blanking die, the cold made the mold, cold die, punch, high hardness, high brake line cutting good. Repair welding before heating to preheat, welding repair to do after the heat action. MA-1G> 1.6 ~ 2.4mm, the super-mirror wire, mainly used in military products or demanding products. Hardness of HRC 48 ~ 50 maraging Department of steel, aluminum die-casting mold, low pressure die casting mold, forging mold, stamping die, injection mold of the surfacing. Special hardened high toughness alloys, aluminum gravity die-casting mold, the gate is ideal for extended service life of 2 to 3 times, you can create a very sophisticated mold, super mirror (gate repair welding difficult to thermal fatigue cracks). High-speed steel wire (SKH9)> 1.2 ~ 1.6mm HRC 61 ~ 63 high-speed steel, the durability of 1.5 to 3 times the ordinary high-speed steel for the manufacture of machining high temperature alloys, stainless steel, titanium, high strength steel and other difficult to machine materials tools, broach welding repair, hot high hardness tool, mold, forging mold, hot die, screw mold, wear stiff dough, high-speed steel, red with tools, electronic components, thread rolling die, dental lamina, diamond wheel, roll matrix, compressor blades and various molds and mechanical parts ... European industrial standard of strict quality control, high carbon content, composition excellent material for the internal organization of uniform, stable hardness and wear resistance, toughness, high temperature ... Characteristics are better than the materials of the same level. Nitride parts repair welding wire> 0.8 ~ 2.4mm of HB ~ 300 applies nitride molds, parts of the surface patch. 2, cast wire Some alloys, such as cobalt-chromium tungsten alloy, not forging, rolling and drawing, and made of casting methods. It is mainly used for manual welding of the workpiece surface, in order to meet the anti-oxidation, abrasion and high temperature corrosion-resistant special performance requirements. Continuous casting and liquid extrusion can be manufactured up to a few meters of cobalt-chromium tungsten wire, used to automatically fill in the wire tungsten gas shielded arc welding, in order to improve the welding efficiency and quality of surfacing layer, while improving working conditions. Cast iron welding is sometimes cast wire. 3, Welding Flux With a thin steel strip coils into a round or shaped steel tubing, filled with a certain composition of the powder, made by the pull slit flux cored wire, or steel pipe to fill the powder pull made of seamless flux cored wire (see photo). Welding with this wire deposited high efficiency, good adaptability on the steel, the trial period is short, and therefore its use and the use of expanding. This wire for CO2 gas shielded welding, submerged arc and electroslag welding. The powder composition is generally in the flux-cored wire electrode drug skin. Containing slag, made the composition of gas and stable arc flux cored wire welding without shielding gas, said the self-shielded flux cored wire, suitable for large welded structure works. Asked the city gas shielded flux cored wire had already started to develop as early as in the early 1950s, but by 1957, is widely used commercially. This method can be said from the submerged arc welding and CO2 welding (referring to solid), the advantages of a combination of flux wrapped in wire and by external CO2 gas protection allows welding to produce a soft and stable arc and low spatter of its features. Early stage of development, only a large wire diameter wire (2.0-4.0mm), for the material of the workpiece flat welding and horizontal welding. Small wire diameter wire up to 1972 began to develop only greatly expanded the areas of flux cored wire. Self-shielded flux cored gas shielded flux cored asked the city will soon be developed, but also be industry wide recognition on a specific purpose. The biggest difference between the two points in the second unit would have been stated, this unit will make the whole discussion. 2, flux cored wire manufacturing flux cored wire manufacturing process control is very strict to ensure that the filler metal from the steel skin material and the flux contained in the ingredients, manufacturing before the size and chemical composition are required to check the quality. Welding consumables internal space is restricted, the flux particle size is more important, the formation of particles similar to Bird's Nest-like combination of constituent elements is uneven flux. Most of the flux cored wire by a flat sheet metal strip into a U-shaped cross section, paragraph by paragraph, after the roll volume and granular flux fill the U-shaped metal tank volume steps and then the final seal roll flux tightly roll pressure in a tubular wire rolled into a tubular wire after a series of pull movements become final wire diameter, this pulling action can also be filled flux uniform fixed in the welding the Sipi material within. Manufacturing / production process wire internal control caused by poor part of the wire formed hollow (no flux) is the key to the flux cored wire production quality. Wire surface also need smooth ride and clean otherwise it will affect the smooth wire feed and welding current pass fast. Welding wire packaged in rolls or barrels in order to avoid wire entanglement or impairment, usually rolls of wire are plastic encapsulation and place the desiccant to avoid material moisture, encapsulation materials and then into the cardboard box sent. Section in the skin material is thicker and more for docking (BUTT,) mode welding dose less, the vast majority of carbon steel and low alloy steel, wire diameter 2.8mm and below are the cross section of such a shape, such as stainless steel high- alloy and wire diameter is large, domestic demand and a larger space of wire inclusive cross sectional shape of flux and alloying elements into a multi-spliced ??or heart-shaped (LAP and the HEART SHAPED) connector. 3, the characteristics of flux cored wire: As mentioned earlier the flux cored wire to highlight a number of favorable characteristics of the welding method, for example, the flux part of the play with coated electrode can improve the function of the filler metal chemical composition and mechanical. Production efficiency, there are gas shielded metal arc welding and submerged arc welding characteristics. Flux cored wire for carbon steel, low alloy high-tensile steel, high strength quenched and tempered steel, stainless steel and wear-resistant hard surface cover such as steel of welding. Flux cored wire is a promising new type of welding materials, and increasing domestic flux cored wire types and rates in recent years. Compared to solid wire, flux cored wire has the following advantages and disadvantages. (1) advantages: 1) a variety of steel welding flux composition and proportion of the adaptable adjustment is very convenient and easy, you can provide the required weld chemical composition. 2) the process performance, candle seam forming a beautiful and air residue joint protection, get a good forming. Add to arc stability agent so that the arc stability, uniform droplet transition. 3) cladding speed, high production efficiency in the same welding current, the current density of the flux cored wire melting speed, the deposition rate of about 85% -90%, productivity is about 3-5 times higher than SMAW. 4) can be larger welding current, all-position welding. (2) Disadvantages 1) 2) welding wire manufacturing process, the wire feed than the solid wire difficult 3) wire appearance easily corroded powder easy to absorb moisture, so the flux cored wire to hold a management requirements more stringent 3.1, the flux composition functions: play with the coated electrode, flux cored wire manufacturers of the flux ingredients are the property of their unique formulation, with the welding consumables applicable to the function of flux composition is also different. The basic function of the flux composition is outlined as follows: (1) oxygen scavenger and nitrogen getter nitrogen and oxygen can make the weld metal caused by pores or embrittlement, the flux must be added to the oxygen scavenger such as manganese and silicon, as to protect the drug core wire, flux is also required to add the AL for the nitrogen removal agent. Above add a deoxidizing agent in addition to nitrogen agents aimed at the purification of the filler metal. (2) The welding slag formation agent calcium, potassium, sodium or silicon are welding slag forming agent added in the flux can effectively protect the weld pool from atmospheric pollution, welding slag can weld props better appearance and rapid cooling can support the full posture welding bath. Welding slag coverage will ease the filler metal cooling rate, this feature is especially important on the low alloy steel. (3) arc stabilizer sodium and potassium can make the arc to maintain a soft and smooth but also reduces splashing. (4) the addition of the alloying elements molybdenum, chromium, carbon, manganese, nickel and vanadium alloying elements can be improved (improve) the filler metal strength, ductility, hardness and toughness. (5) the formation of gas the agent fluorspar, limestone, etc. need to add in the combustion to produce a protective gas shielded flux cored wire manipulation. Flux component of 3.2 welding slag category determines the mechanical welding consumables welding workability and filler metal, acid-based in terms of the flux composition, welding is generated after the acidic welding slag, the same alkaline (calcareous) flux Lord produce alkaline welding slag. Acidic consumables weldability is very good, smooth and stable arc welding process, morphologically similar jet arc, spatter less homework widely welding personnel like filler metal machinery common but up to AWS specification requirements. The filler metal flux welding consumables for the basic system can make very good ductility and toughness, workability than acidic Department worse. Droplet transition-based, multi-ball drop transition splash more. In recent years, the development of low alloy steel welding consumables, welding flux blend of acidity Department of operating alkaline Department of fine mechanical. 4 cold, EDM wire EDM coating cold welding wire used in the normal condition of surfacing or welding, weld up the second feature is the wire temperature does not exceed 40 degrees Celsius, and are more for continuous welding is not ultra-high 80 degrees Celsius. Mainly used for the repair of some heat-resistant parts, welding stoppage time, temperature controlled at 40 degrees Celsius, the wall thickness of 0.4-0.5 mm, the maximum is not higher than 100 degrees Celsius. Wire welding caught with the same heat-affected zone is very small, does not produce internal stress. Very suitable for casting defects, parts of the surface strain, wear, mold defect repair. Why such a low wire temperature, because the wire melting state of the micro-melting in contact with the workpiece by the external forces soon formed a small portion of short mobile workpiece up, melting less, compared to the much larger workpiece. The temperature is quickly dissipated. The wire temperature is not rising to the whole of its redness, super anti-red capability. Compared with ordinary wire, if the duration is too long, there will be a serious red wire, black solder phenomenon. Even be capable of welding, welding repair, and prone to oxidation, the dregs, not higher welding phenomenon, and affect its subsequent processing.
Not long ago, after a pre-technological properties, mechanical properties and wire deposited metal and other tests, Baoji Petroleum Steel Pipe Co., Ltd. developed the X80 girth weld wire, the performance can meet the standard requirements, the trial is successful. Pipeline girth weld wire belonging to the high-end products in the pipeline Welding Wire consumables. November 5, 2009, the company included in the X80 girth weld wire project West-East Gas Pipeline Project study two major projects, shared R & D task by Baoji Steel Corporation and the China Petroleum Pipeline Bureau. The test wire deposited metal test is extremely difficult. Gas shielded wire energy is small, the depth of weld penetration, and multi-layer multi-pass welding, filling nearly 70 in the narrow groove weld, it is easy to produce welding defects. As long as there is a weld problems, have all polished off. Sometimes continuous welding for a week, even a qualified deposited metal test panels are not completed. The group members all day long soak in the laboratory to look into the problem, find a cause, and finally the wire mechanical properties meet the standard requirements. To wire process performance test, the project team members went twice the Langfang Pipeline Bureau, Institute of Science and Technology, after nearly a month of debugging process, the successful Welding Electrode of qualified weld. Wire test report developed by Baoji Steel X80 girth weld wire excellent welding performance, arc stability, all-position operating performance and weld good, good girth weld appearance, the film qualified, to meet Q/SY-GJX0110 West second-tier line welding of pipeline engineering technical specifications. Pipeline girth weld wire belonging to the species of high value-added consumables, pipeline construction site, basically a few companies of foreign products, and wire prices higher. The localization of the X80 ring weld wire will break the monopoly of foreign enterprises, to meet the building needs of the domestic high-grade steel pipe.