Ultra-fine grain aluminum alloy gold welding wire and preparation method thereof

Abstract

The invention relates to an ultra-fine grain aluminum alloy gold welding wire and a preparation method of the ultra-fine grain aluminum alloy gold welding wire. The ultra-fine grain aluminum alloy gold welding wire includes the following components: SC 0.05%-0.8%, Er 0.05%-0.6%, misch metal 0.01%-0.8%, B 0.01%-0.5%, Ti 0.1%-0.3%, Cr 0.05%-0.4%, Zr 0.05%-0.2%, Mn 0.1%-0.6%, Zn 0.2%-1.0%, Mg 4%-8%, and the rest is Al. The preparation method is as follows: adding an aluminum ingot or the molten aluminum into a semi-closed reverberatory furnace firstly; adding Mn, Ti, Zr, Cr and Zn; adding B and the misch metal; conducting the furnace refining on the alloy melt; slagging the alloy melt after the refining; pressing Mg into the alloy melt after stewing; adjusting the temperature of the melt for standby; pouring the melt in an electromagnetic continuous casting machine; preparing an aluminum alloy ingot casting; lifting up the aluminum alloy ingot casting for homogenizing annealing and scalping for standby; putting the aluminum alloy ingot casting into an extrusion die for extrusion, extruding an aluminum alloy wire disc; and conducting wire drawing till the specification and the diameter reach the standard and using. The ultra-fine grain aluminum alloy gold welding wire can effectively improve the structural strength of a welding structure and the welding performance, and overcomes the welding defects of the low strength of an aluminum alloy welding joint and welding cracks.

Description

technical field

[0001] The invention relates to the field of aluminum alloy welding materials, in particular to an ultrafine grain aluminum alloy welding wire and a preparation method thereof. Background technique

[0002] Because of its small specific gravity, good corrosion resistance, high electrical conductivity and thermal conductivity, aluminum and its alloys are widely used in aviation, navigation, military industry, transportation, bridges, electrical and electronic fields. Aluminum alloy welding is a necessary means for the wide application of aluminum alloy materials. The characteristics of aluminum alloy welding are mainly reflected in the following aspects: 1. The affinity between aluminum and oxygen is very high. In the air, aluminum is easily combined with oxygen to form a tight and strong Al. 2 o 3 The thin film hinders the melting of the base metal and the good combination between each other, and is easy to cause slag inclusions, and the oxide film will also...

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