High-strength Al-Mg-Zr welding wire for ships and preparation method of high-strength Al-Mg-Zr alloy welding wire

Abstract

The invention discloses a high-strength Al-Mg-Zr welding wire for ships. Alloy plate material of the alloy welding wire comprises, by weight: 5.5-6.5% of Mg, 0.7-1.1% of Mn, 0.02-0.15% of Zr, 0-0.3% of Er, 0-0.4% of Si, 0-0.4% of Fe, less than or equal to 0.1% of other single impurity element, and the balance Al. The invention also discloses a preparation method of the alloy welding wire. According to the high-strength Al-Mg-Zr alloy welding wire for the ships and the preparation method of the alloy welding wire, the micro Er element is selected as an effective component of the alloy, so thatthe mechanical property of the whole aluminum alloy welding wire is effectively improved, meanwhile, the deformation energy storage of the surface layer of the aluminum alloy is higher, and thus the tensile strength of a welding wire joint, the bending degree of the welding joint and the elongation rate after the joint is broken are effectively improved; and in addition, the process is simple andeasy to operate, and through adopting the method, the homogenization annealing treatment is thorough in the process of manufacturing the welding wire, so that the mechanical property and corrosion resistance of the manufactured product are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of magnesium-aluminum alloy manufacturing, and in particular relates to a high-strength Al-Mg-Zr alloy welding wire for ships and a preparation method thereof. Background technique [0002] Aluminum alloy is a lighter metal material that only began to be used industrially in the early 20th century. During the Second World War, aluminum was mainly used to manufacture military aircraft; after the war, due to the sharp drop in demand for aluminum in the military industry, the aluminum industry began to develop civilian aluminum alloys, expanding its application scope from the aviation industry to ships etc. [0003] In the field of ships, as the requirements for the mechanical properties and corrosion resistance of the aluminum alloy welding wires used in ships as a whole have become higher and higher in recent years, the existing aluminum alloy welding wires still have poor mechanical properties and joint res...

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Problems solved by technology

[0004] In view of this, the main purpose of the present invention is to provide a high-strength Al-Mg-Zr alloy welding wire for ships, which solves the problem of poor mechanical properties of existing alloys and low energy storage for surface deformation, which leads to the resistance of welding wire joints. Problems of weak tensile strength, low bending of welded joints and low elongation of joints after fracture

[0005] The main purpose of the present invention is also to provide a method for preparing high-strength Al-Mg-Zr alloy welding wire used in ships, which solves the problem of incomplete homogenization annealing treatment in the prior art, which leads to the mechanical properties of the prepared product. Poor, poor anti-corrosion effect

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