Exothermic welding definition
Exothermic soldering is a simple, high-efficiency, high-quality metal joining process that utilizes the chemical reaction heat of a metal compound as a heat source, through superheated (reduced) molten metal, directly or indirectly heated, in a special graphite mold A welded joint with a certain shape and size in accordance with engineering requirements is formed in the welding chamber. At present, exothermic welding has generally replaced the mechanical and physical connection methods between metals in the past. Many international standards recommend the use of exothermic welding processes in grounding systems, such as IEEE, IEC, NEC, ASME, etc.
Exothermic welding reaction principle
Advantages of exothermic welding
The generated solder joint is pure copper, which is a permanent atomic bond. The corrosion resistance, electrical conductivity and mechanical strength of the solder joint are not lower than the conductor itself, and the problem that the mechanical and physical connection is easy to loosen is avoided;
The reinforced integrated heat-dissipating flux is non-dangerous. It adopts sealed waterproof design. The flux does not contain harmful materials such as phosphorus and magnesium, which is convenient for transportation and storage.
The precise component packaging can be provided according to the connection mode, and under the premise of fully ensuring the standardization of the welding quality, the damage of the metal base material by welding is not only minimized, but also the service life of the mold is greatly improved;
The welding method is simple and easy, no professional skill is required, the quality of the welding point is high, the materials and tools for welding are light in weight, easy to carry, no external power source or heat source is needed for welding; high-strength, high-purity high-quality graphite raw materials are used to produce the mold. The graphite has high compactness to ensure the lowest adhesion of the welding residue and the longest service life of the mold. From the reaction, diversion to welding design is reasonable, to avoid mold explosion, welding copper splash and other phenomena, welding quality is high; the only domestic through IJL, CE' and RoHS full range of authority certification.
Exothermic flux product performance
|Serial number||Technical content||Technical Parameters|
|1||Net weight of content||45g/90g/115g/150g/200g/250g ⋯|
|2||Content component||The flux contains 75-82% copper oxide and 18-25% catalyst. The welded joint is more resistant to corrosion than the conductor itself, and does not contain phosphorus or magnesium. It is non-toxic and harmless.|
|3||Production Process||Automated filling system with high consistency of filling ingredients|
|4||Service life||Unlike general domestic products, the wet environment has little impact on product performance, and the material loss rate due to waste is extremely low, and the theoretical life is indefinite.|
|5||Packing||S2-31 series reinforced integrated flux is non-dangerous. It is packaged according to different welding requirements to ensure the standardization of solder joint quality and increase the service life of mold by more than 30%. The product certificate and original nameplate are attached. Required aluminum sheet|
|6||Certified content||Products have passed the authoritative UL, CE and RoHS certification|