1561 Aluminum Plate for Shipbuilding
Al-Mg has the advantages of small specific gravity, high specific strength, good seawater corrosion resistance, and good low temperature performance. Using it as a hull material can effectively reduce the weight of the ship, improve the stability and speed, and enhance the technical and tactical performance of the ship.
Aluminum alloy is particularly suitable for high-speed planing craft, hydrofoil craft, landing craft, small surface craft and some special purpose craft. 1561 aluminum plate is gradually used in special aluminum alloy ships because of its high strength and good corrosion resistance.
1561 aluminum alloy is an aluminum alloy with high magnesium content. It is easy to produce defects such as pores and cracks during the welding process. How to ensure that these defects do not appear in the weld during the construction of the hull is a key issue to ensure the quality of production.
Ordinary TIG and MIG welding method speeds up the solidification process of the weld, and is not conducive to the full discharge of defects such as pores and inclusions because the back of the weld has a forcedly formed backing.
Learning from the characteristics of perforation welding that is beneficial to the discharge of pores in the molten pool. The TIG deep penetration welding process for aluminum alloy is recommended.
This welding method does not have a forced-formed backing when welding. The welding current is larger than that of ordinary TIG. The base metal is melted by the arc heat of the tungsten electrode to form a welding molten pool. The molten pool flows under the action of arc blowing force and gravity. On the back of the weldment, a protruding weld is formed after cooling.
The use of TIG deep penetration welding process for 1561 marine grade aluminum sheet welding can significantly reduce the defects such as pores and inclusions in the weld. X-ray film inspection and tensile and bending mechanical properties test results show that the weld meets the classification society Class I weld standard.
