Aluminum-magnesium alloy welding wire for improving Mn content
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An aluminum-magnesium alloy and welding wire technology, applied in the field of aluminum-magnesium alloy welding wire, can solve problems such as affecting the performance of welds
Active Publication Date: 2013-01-23
NORTHEASTERN UNIV
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Problems solved by technology
The traditional concept restrains everyone, so that they dare not add more manganese to the aluminum-magnesium alloy, lest the performance of the weld be affected due to the appearance of a coarse Mn-containing phase
Method used
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Embodiment 1
[0021] The composition (calculated by weight percentage) is 1.5Mn, 4.5Mg, ≤0.15Si, ≤0.25Fe, ≤0.15Cr, ≤0.15Ti, ≤0.10Cu, ≤0.10Zn, ≤0.15Zr, and the balance is Al and unavoidable The welding seam welded by welding wire with high Mn content of impurity elements, the tensile mechanical properties can reach tensile strength = 300.9MPa, yield strength ≥ 146.0MPa, elongation = 15.2%, and the bending performance and stress corrosion resistance are comparable to those of The results of welding with 5356 aluminum alloy welding wire are the same.
Embodiment 2
[0023] The composition (calculated by weight percentage) is 1.0Mn, 5.5Mg, ≤0.15Si, ≤0.25Fe, ≤0.15Cr, ≤0.15Ti, ≤0.10Cu, ≤0.10Zn, ≤0.15Zr, and the balance is Al and unavoidable The welding seam welded by welding wire with high Mn content of impurity elements, the tensile mechanical properties can reach tensile strength = 300.7MPa, yield strength = 144.8MPa, elongation = 15.2%, and the bending performance and stress corrosion resistance are comparable to those of The results of welding with 5356 aluminum alloy welding wire are the same.
Embodiment 3
[0025] The composition (calculated by weight percentage) is 2.0Mn, 5.0Mg, ≤0.15Si, ≤0.25Fe, ≤0.15Cr, ≤0.15Ti, ≤0.10Cu, ≤0.10Zn, ≤0.15Zr, and the balance is Al and unavoidable The welding seam welded by welding wire with high Mn content of impurity elements, the tensile mechanical properties can reach tensile strength = 302.0MPa, yield strength = 147.3MPa, elongation = 14.7%, and the bending performance and stress corrosion resistance are similar to those of The results of welding with 5356 aluminum alloy welding wire are the same.
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Abstract
The invention discloses an aluminum-magnesium alloy welding wire for improving the Mn content. The aluminum-magnesium alloy welding wire is characterized in that the Mn content in the welding wire is improved by 1.0-2.0 wt%; if calculated in percentage by weight, the other chemical components of the welding wire comprise 4.5-5.5% of Mg, less than or equal to 0.15% of Si, less than or equal to 0.25% of Fe, less than or equal to 0.15% of Cr, less than or equal to 0.15% of Ti, less than or equal to 0.10% of Cu, less than or equal to 0.10% of Zn and less than or equal to 0.15% of Zr; and the balance are Al and inevitable impurity elements. The optimal addition quantity of Mn in the welding wire is 1.5 wt%. Because the Mn content in the aluminum-magnesium alloy welding wire provided by the invention is reached about the maximum solubility of Mn in a solid solution in an aluminum-magnesium alloy phase diagram, the Mn Al6 dispersoid particle is furthest separated out in the aluminum-magnesium alloy, so that the strength of a welded joint can be improved. After a lot of tests are carried out, compared with Al-5Mg alloy welding wires, such as 5356, 5183 and 5087 welding wires imported from a foreign country, the percentage elongation of the welding joint of the welding wire provided by the invention is approximate to that of the imported welding wires, while the yield strength and the tensile strength of the welding wire provided by the invention are improved and are more approximate to the level of an aluminum-magnesium alloy base metal.
Description
technical field [0001] The invention belongs to the technical field of solder used for welding characterized by the composition and properties of materials, and in particular relates to an aluminum-magnesium alloy welding wire with a higher manganese content than similar solders. Background technique [0002] Many aluminum alloy components are formed by welding in practical applications, and most of them are required to be used directly without intensive heat treatment after welding. strength, ductility and corrosion resistance. Since the aluminum-magnesium alloy (that is, the 5××× series aluminum alloy) is close to the above-mentioned comprehensive performance requirements, the widely used aluminum alloy welding wire is the 5××× series aluminum-magnesium alloy welding wire. However, the strength of the existing aluminum-magnesium alloy welding wire after welding is still low and the strength of the base material is quite different, and the mechanical performance potential ...
Claims
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