Aluminium-silicon alloy welding wire and preparation method thereof

Abstract

The invention discloses an aluminium-silicon alloy welding wire and a preparation method thereof. According to the weight percent, the welding wire comprises 4.5-6.0% of silicon, 0.05-0.20% of titanium, 0.0001-0.0003% of beryllium, 0.01-0.06% of strontium and the balance aluminium. The preparation method comprises the steps of: adding the aluminium in a way of pure metal, and then adding other elements in a way of aluminium-based intermediate alloy; adding aluminium ingot and AeSi30 into a gas reflecting furnace, smelting and then adding slag beating agent for stirring and deslagging; then, adding AlTi10 and AlSr10; after 35-35min, adding refining agent for refining under the protection of argon; after refining, horizontally and continuously casting, and forming an aluminium alloy coil rod; and drawing the aluminium alloy coil rod for a plurality of times, and processing continuous disc-shaped welding wires with different specifications. Compared with the prior art, the invention has simple preparation method and easily controlled operation, and obviously reduces the phenomena of volatilization, oxidation and burning loss in the smelting process; and the obtained welding wire has excellent plastic processing performance and mechanical property.

Description

technical field [0001] The invention relates to an aluminum-silicon alloy welding wire and a preparation method thereof, belonging to the technical field of metal material preparation. Background technique [0002] The commonly used type of existing aluminum-silicon alloy welding wire is ER4043, which is widely used in the welding of ships, locomotives, chemicals, sports equipment, bicycles, molds, furniture, containers and containers. The chemical composition (weight) of this type of welding wire produced by some manufacturers is: Si 5, Mg≤0.10, Fe≤0.04, Cu≤0.05, AL allowance. However, the plastic workability and mechanical properties of the existing Al-Si alloy welding wire are not ideal. SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the present invention is to provide an aluminum-silicon alloy welding wire which can reduce the size of primary crystal silicon particles and has better plastic workability and mechanical properties and a preparati...

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Problems solved by technology

However, the plastic workability and mechanical properties of the existing aluminum-silicon alloy welding wire are not ideal.

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