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Welding method of steel structurePosted by:W&G International Co., Ltd.
Welding method of steel structure
The welding method of steel structure in the electric arc welding, resistance welding etc.. Electric arc welding The most common welding method of steel structure for electric arc welding, its quality is reliable. Electric arc welding can be divided into manual electric arc welding, automatic and semi automatic submerged arc welding and gas shielded welding etc.. Manual arc welding is energized with flux in the coated electrode (is a) and welding (for another pole) generated between arc, arc provided by heat source, so that the electrode melting, small groove weld pool was blown into dropping arc in the welding of the melting part, and condensed into the weld (Figure 3-2). The electrode is coated with a coating, when the electrode melting, coating formation of slag and inert gas blanketing molten pool, to prevent the liquid metal contact with the air of oxygen, nitrogen and other harmful gases and melting and the formation of brittle compound fissile. Quality depends on the manual welding weld on the welder technical level. Manual arc welding electrodes shall be compatible with the welding strength of steel, such as Q235 steel by using E43 welding rod, Q345 steel by using E50 welding rod, Q390 steel by using E55 welding rod. Specific regulations for the national standard "steel electrode > GB/T5117-1995 and" low alloy steel electrode "one of 5118 GB/T 1995. When different grades of steel are connected, and the low strength steel should be used to adapt the electrode. 【Print this page 】 【close】 |