Preparation method of Al-Mg-Mn alloy wire

Abstract

The invention discloses a preparation method of an Al-Mg-Mn alloy wire. The preparation method comprises the following steps of (1) preparing raw materials according to alloy components, wherein the alloy comprises the following components in percentage by weight: 4.5-6.5% of Mg, 0.4-1.5% of Mn, 0.05-0.2% of Zr, 0.05-0.25% of Sc and the balance of Al; or the alloy comprises the following components in percentage by weight: 4.5-6.5% of Mg, 0.4-1.5% of Mn, 0.05-0.2% of Zr and the balance of Al; (2) smelting the raw materials in a protective atmosphere; (3) conducting water quenching after pouring; (4) conducting homogenizing heat treatment and water quenching; (5) conducting hot extrusion at 500+ / -10 DEG C; conducting water cooling to normal temperature; and (6) conducting cold drawing on an extrusion bar. By means of the method, the solid solution effect of the Mg element in the aluminum alloy and the second phase strengthening effect of the Mn element in the aluminum alloy can be effectively combined; and according to the wire, a small amount of Sc is added on the basis of the Al-Mg-Mn alloy, so that the tensile strength of an alloy bar can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy material processing, and in particular relates to a preparation method of Al-Mg-Mn alloy wire. [0002] technical background [0003] Due to the serious loss of Mg element in the welding process of Al-Mg series welding wire, the content of Mg element in the aluminum-magnesium welding wire is relatively high. However, the aluminum-magnesium alloy with high Mg content has the problem of difficult deformation, which leads to the phenomenon of wire breakage in the process of producing aluminum-magnesium welding wire. , seriously affecting production efficiency. Mn element can effectively improve the mechanical properties of aluminum-magnesium alloys. It is the most widely used alloying element in Al-Mg welding wire alloys. The content and existence form of Mn elements play an important role in the performance of aluminum-magnesium welding wire products; In the production process of welding wire...

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Problems solved by technology

[0003] Due to the serious loss of Mg element in the welding process of Al-Mg series welding wire, the content of Mg element in the aluminum-magnesium welding wire is relatively high. However, the aluminum-magnesium alloy with high Mg content has the problem of difficult deformation, which leads to the phenomenon of wire breakage in the process of producing aluminum-magnesium welding wire. , seriously affecting production efficiency

Mn element can effectively improve the mechanical properties of aluminum-magnesium alloys. It is the most widely used alloying element in Al-Mg welding wire alloys. The content and existence form of Mn elements play an important role in the performance of aluminum-magnesium welding wire products; In the production process of welding wire, the alloying effect of Mn element has not received due attention; due to the serious Mg segregation phenomenon in the as-cast structure of aluminum-magnesium alloy, the homogenization heat treatment of ingot is a necessary process before extrusion deformation. Most of the homogenization process used is 450~550℃, holding time 12~24h, (for example, patent No. CN20151077963.5, CN201711233754.1 and other invention patents), mainly for the homogenization of Mg element, for the Mn element in the alloy At the same time, the impact of extrusion deformation and drawing annealing process on the effect of Mn element has not been paid attention to, which is one of the main reasons for the unsatisfactory quality and mechanical properties of the obtained alloy wire billet

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