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Large diameter thick-walled steel pipe The main reason for the formation of wire diameter is not uniform, the wire connector is not smooth, uneven wire hardness caused by uneven wire, metal burr caused by the instantaneous short circuit. The occurrence of such a situation can take preventive and control measures are: check the large diameter thick-walled straight seam steel pipe is the main reason for the formation of wire diameter is not uniform, the wire connector is not smooth, uneven wire hardness caused by uneven wire, metal burr caused by electricity Mouth instantaneous short circuit. The occurrence of such a situation can take preventive measures are: check the size of the wire diameter if the conductive tip for the conductive tip is appropriate to expand the diameter of the conductive nozzle to ask the wire to the welding wire joints to ensure that the joints at the same diameter consistent cutting hardness, Cut edge and milling edge to ensure no burr, regular venting flux and magnetic screening.
Submerged arc welded straight seam steel pipe is a steel or steel plate by the plastic deformation of a circular shape and then welding and forming, the surface of the seam steel pipe. Long seam welded pipe production process is simple, high production efficiency, and thus develop faster. Manufacturing straight seam steel pipe can be used arc welding, submerged arc welding and other welding methods, in which submerged arc welding is an important welding method. Submerged arc welding is the arc under the flux layer of an arc welding method, the basic principle is as follows: in the flux layer, the arc at the end of the welding and welding between the welding, the flux melting, evaporation, the formation of gas, the formation of closed around the arc Cavity. As the welding wire is continuously fed into the molten bath into the molten pool, the molten metal is mixed with the molten base metal. As the welding process progresses, the arc moves forward, the molten pool is cooled and solidified to form a weld, and the slag In the pool surface, effectively protect the molten pool metal, after cooling to form slag shell. Submerged arc welding is divided into single-sided and double-sided submerged arc welding, with high welding quality, no arc, less dust and so on. At present submerged arc welding has developed a double wire and multi-wire submerged arc welding. The welding position is in the flat welding position, the welding current is large, the molten bath formed when welding is larger, so it is easy to realize the welding of the high standard wall thickness steel pipe. As a result of less artificial impact, weld appearance, the formation of welded joint quality and stability, suitable for large-scale production.
Hebei ChongSheng Special Steel Pipe Co.,Ltd.
Add: YANSHAN COUNTY,HEBEI PROVINCE,CHINA