Welding rod for reinforcing cage of bridge pile foundation
First of all, the electrode strength is greater than the strength of reinforcement, steel cage reinforcement is generally two bar steel bar, with 502 electrodes on it
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First, according to JGJ18-2003T steel welding and acceptance procedures, welding HPB235 steel, E4316 and E4315 welding rod can be used; welding HRB335 steel bar, E5016 and E5015 welding rod should be adopted. E6016 and E6015 welding electrodes shall be used to weld HRB400 steel bars.Two, selection of basic principles of welding rod:1, equal strength principle, that is, choose the same strength as the parent material electrode. Generally used for welding low carbon steel and low alloy steel.2, with the principle of the same component, and the parent metal chemical composition of the same or similar electrode. Generally used for welding heat-resistant steel, stainless steel and other metal materials.3. The principle of crack resistance is to use alkaline welding rod with good crack resistance so as to avoid cracks in welding and using process. Generally used for welding rigidity, complex shape, the use of dynamic load in the welding structure.4, the principle of the welding process by anti stomatal limitation, such as oil, welding joints rust cleaning inconvenience, acid electrode should be used in anti blowhole ability, so as to avoid the gas in the welding process to weld porosity formation stranded.5, low cost principle, to meet the requirements of the premise, as far as possible the use of good performance, low cost and high efficiency of welding rod.6, and other principles of toughness, that is, electrodes, deposited metal and base metal and other toughness or similar, because in practice, the welding structure of the fear of bad, mostly because the strength is not enough, but the lack of toughness. Therefore, when the electrode is selected, the strength is slightly lower than that of the base metal, while the toughness should be the same or similar. This is also the low toughness and toughness of high strength steel when welding.
