Preparation method of 5356 aluminum alloy welding wire

Abstract

The invention provides a preparation method of a 5356 aluminum alloy welding wire, and belongs to the technical field of aluminum alloy welding wires. The preparation method comprises the following steps that a 5356 aluminum alloy cast ingot is prepared through direct water cooling semi-continuous casting, then is heated to 460-520 DEG C, and keeps warm for 2-4 hours, and hot extrusion is carriedout to obtain an 5356 aluminum alloy hot extrusion line rod; the 5356 aluminum alloy hot extrusion line rod is heated to 480-550 DEG C, heat preservation is carried out for 3-6 hours, rolling is carried out, the obtained 5356 aluminum alloy wire blank is subjected to middle annealing, the wire blank of the annealing state welding wire is peeled off, and the wire blank is pulled in a plurality oftimes, so that the 5356 aluminum alloy welding wire with the diameter of 1.2 mm is obtained. According to the preparation method, the production process of the 5356 aluminum alloy welding wire is remarkably shortened, the energy is saved, the production efficiency is improved, the production cost of the 5356 aluminum alloy welding wire can be greatly reduced, the 5356 aluminum alloy welding wire with fine alloy phase particles uniformly distributed on an alpha-A1 matrix can be obtained, the quality of the welding wire is improved, the stability of the welding process is guaranteed, and the comprehensive performance of a welded joint is improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy welding wire, and in particular relates to a preparation method of 5356 aluminum alloy welding wire. Background technique [0002] The joints welded with 5356 aluminum alloy welding wire have the characteristics of high strength and good corrosion resistance, so they are widely used in the welding of aluminum alloy components in rail vehicles, shipbuilding, aviation, weapons, construction and other industries. The production methods of conventional 5356 aluminum alloy welding wire billets mainly include the following: (1) semi-continuous casting (Direct Chill Casting, DC casting) ingot casting + high temperature homogenization treatment + hot extrusion + rough drawing (hot rolling), (2) Horizontal casting wire rod + rough drawing (hot rolling), (3) cast rolling wire rod + rough drawing (hot rolling), (4) cast extrusion wire rod + rough drawing (hot rolling), through The wire blank prepared...

AI Technical Summary

Problems solved by technology

[0003] Among them, the quality of welding wire prepared by DC casting ingot + high temperature homogenization treatment + hot extrusion + rough drawing (hot rolling) is the best, but the manufacturing cost of welding wire is relatively high. Among them, the temperature of ingot high temperature homogenization treatment is as high as 560 °C , the time generally exceeds 20 hours, and this process is the most time-consuming and energy-consuming link except for the alloy smelting process

The purpose of homogenization treatment is to eliminate the dendrite segregation of the ingot, promote the uniform diffusion of elements and improve the hot workability, but it is worth noting that the micron-sized insoluble AlFeMnSi crystal phase balls mainly contained in the alloy will coarsened and distributed along the boundaries of the dendrites, this coarse granular excess crystalline phase is difficult to break in the subsequent thermal deformation process, and the distribution is extremely uneven, which will affect the processing performance and welding performance of the welding wire

Coarse and excess crystalline phases can easily lead to line interruption during the drawing process. In addition, coarse and excessive crystalline phases can also affect arc stability during welding

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