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Flash butt welding of bar and wire billets is a process in which adjacent billets of bars or wires are welded together on the rolling production line to achieve continuous rolling. It has good welding quality, fast speed and high efficiency, can reduce the amount of scrap and reduce the loss of components. It is welded firmly and the properties of the welded parts are the same as those of the base material. Ability
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Wire rods include low carbon steel wire rods, medium and high carbon steel wire rods. It is an economical and efficient steel material with high tensile strength and yield strength, good plasticity, and low relaxation performance. It is mainly used as a blank for wire drawing and is also widely used in the construction of cement products, bridges, nuclear power plants, high-rise long-span buildings, highways, etc.
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Wire rope is mainly used for lifting, pulling, tightening and carrying purposes such as electric hoists, winches, cranes, elevators, airplanes, ships, cable cars, ropeways, etc. During twisting, if the wire is broken or two wires need to be pulled through the mold, quick butt jointing is required. Nowadays, resistance butt welding machines and medium frequency butt welding machines are mainly used for welding.
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Although almost all steel and non-ferrous metals can be flash butt welded, most of them now only flash butt weld iron pipes, steel pipes, flat iron flanges, large-section steel bars, etc. Due to the high price, resistance butt welding is used for other materials.
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Low carbon steel has high resistivity. When melted at high temperature, carbon elements produce protective atmospheres of CO and CO2 and do not produce high melting point oxides. Therefore, the weldability is good. Medium carbon steel has higher carbon content than low carbon steel, has higher resistivity, crystallization interval, high temperature strength and is easy to harden. It is necessary to increase the upsetting force and upsetting allowance
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The content of each element in alloy steel is different. Their physical and chemical properties are also different, and the weldability is naturally different. When using flash butt welding machine welding, the following process measures should be paid attention to:
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Resistance welding includes spot welding, butt welding, projection welding, and seam welding, which belongs to the category of pressure welding. In recent years, it has occupied an important position in welding science and technology. They are widely used in vehicles, construction, pipelines, hardware, sheet metal, aviation, aerospace, energy, electronics, and light industry.
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The welding of carbon brushes and carbon brush wires is mainly done by resistance spot welding machine butt welding machine. It is widely used in power tools, automobiles, motorcycles, electric motors, generators, small kitchen appliances, shavers, and electric vehicles.
Read articleThe spatter during spot welding is caused by the expansion of the metal at the welded area when resistance spot welding or projection welding is heated, forming liquefied metal and plastic rings. They continue to grow under the influence of temperature, causing the air pressure in the melting zone to continue to increase. The uneven wall thickness of the plastic ring allows liquid to overflow.
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