What is the material of galvanized steel pipe: .
Galvanized pipe can also be called galvanized steel pipe. It is mainly made of steel, alloy steel, carbon steel and other materials through galvanizing treatment. Since the surface of galvanized steel pipe is made of galvanized steel, it has certain resistance to rust and corrosion, and can last longer during use.
Tips for welding galvanized steel pipes:
1. The welding on the galvanized layer must be polished first, otherwise bubbles, trachoma, false welding, etc. will appear. It tends to make the weld brittle and reduce its stiffness. Zinc and iron can form brittle intermetallic compounds. Especially the fillet welds of T-shaped interfaces are prone to through gaps during welding. During the welding of galvanized steel, the zinc layer melts, evaporates, and oxidizes under the reaction of the surface of the welding point and the arc heat of the people nearby, which can unfavorably cause welding pores. If the welding parameters are too small, zinc oxide slag inclusions will form. So the zinc should evaporate.
2. Master the welding technology. The preparation before welding of galvanized steel is the same as that of ordinary low carbon steel. Attention should be paid to the size of the treatment tank and the surrounding galvanizing layer. The penetration slope is mostly about 60-65°, and there should be a certain gap of about 1.5-2.5mm. In order to reduce the penetration of zinc in the weld, the groove should be removed before welding and then welded.
3. When using multi-layer welding seams, the zinc layer should be allowed to melt, vaporize and protrude from the welding. This can easily reduce the residual liquid zinc in the welding. The fillet welding method in welding is to move the electrode point forward about 5-7mm. After the zinc layer melts, weld back to the original position and continue welding forward. When using short slag electrodes such as J427 for horizontal and vertical welding, the undercut tendency is very small. If we use round-trip transportation technology, we can get better welding quality.
Summary: The above is the introduction to the material of galvanized steel pipes and the welding tips of galvanized steel pipes. I hope it can help friends in need. For more related knowledge in the future, please consult GNEE STEEL!
