Preparation method of 5356 aluminum alloy ingot

Abstract

The invention relates to a preparation method of a 5356 aluminum alloy ingot. The method uses an electromagnetic effect for heating and for preserving the temperature of an alloy melt, so that the temperature control is convenient; at the same time of heating, as alternating current supplied in an induction coil can form variable magnetic current, and the variable magnetic current can form induction current in an annular pipe communicated with a crucible, the melt circularly flows by surrounding the annular pipe to achieve a stirring effect, and the component and structure uniformity of the aluminum alloy ingot is effectively improved; under the stirring effect generated by the induction coil, the vacuum purification treatment is supplemented to effectively improve the dispersion speed of hydrogen atoms in the melt, so that the high-speed degassing is facilitated, the degassing effect is enhanced, and the hydrogen content in the 5356 aluminum alloy ingot is reduced; and through detections, the hydrogen content of the 5356 aluminum alloy ingot prepared by the method is lower than 0.15 mL / 100 gAl.

Description

technical field [0001] The invention relates to a method for preparing a 5356 aluminum alloy ingot. Background technique [0002] As a general-purpose welding material, ER5356 aluminum alloy welding wire is widely used in the welding of various aluminum alloy structural parts. In recent years, with the large-scale application of aluminum alloy structural parts, the demand for aluminum alloy welding wire is also increasing. In many cases, the quality of the aluminum alloy welding wire and the quality of the weld often depend on the casting level of the aluminum alloy ingot. The air slag control effect of aluminum alloy in the melting and casting process is not good, which will make the air slag content of the aluminum alloy ingot billet high, especially the high hydrogen content, which not only makes the subsequent processing of the alloy difficult, but also affects the drawing and forming of the welding wire. The welding wire is very easy to break, and the finished product ...

AI Technical Summary

Problems solved by technology

The air slag control effect of aluminum alloy in the casting process is not good, which will make the air slag content of the aluminum alloy ingot billet too high, especially the high hydrogen content, which not only makes the subsequent processing of the alloy difficult, but also affects the drawing and forming of the welding wire. The welding wire is easy to break, the finished product rate decreases, and it is easy to produce air holes during the welding process, which seriously affects the quality of the welded joint

[0003] At present, the level of domestic aluminum alloy welding wire materials and forming technology is still relatively low, especially the smelting, purification and internal quality control technology of aluminum alloy ingots is relatively backward, and there is still a big gap compared with foreign countries, mainly in hydrogen and oxides. The inclusion content is high, there is obvious composition segregation and uneven structure, such as the key indicator representing the internal quality of the welding wire-hydrogen content, most of the ingot raw materials provided by domestic manufacturers are above 0.3mL / 100gAl, the aluminum alloy ingot produced by such aluminum alloy The welding process and performance of alloy welding wire are poor, and it is difficult to meet the welding and manufacturing requirements of aluminum alloy components for high-end lightweight equipment in my country

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