High-strength and high-toughness anti-alumina magnesium alloy material for 5G mobile phone middle plate and preparation method thereof

Abstract

The invention discloses a high-strength and high-toughness anti-alumina magnesium alloy material for a 5G mobile phone middle plate and a preparation method thereof, and relates to an aluminum alloy material. The high-strength and high-toughness anti-alumina magnesium alloy material for the 5G mobile phone middle plate and preparation method thereof aims to solve the technical problem that in theprior art, when an alloy material for a mobile phone middle plate is smelted, and the alloy material is easy to oxidize and form oxide inclusions. The high-strength and high-toughness anti-alumina magnesium alloy material for the 5G mobile phone middle plate comprise the following chemical elements of, in percentage by mass, 2.0-5.5% of Si, 5.5-12.0% of Mg, 0.60-1.20% of Mn, 0.01-0.35% of Ti, 0.001%-0.04% of Be, 0.01-0.30% of Ce, less than or equal to 0.40% of Fe, less than or equal to 0.50% of inevitable impurities and the balance aluminum. the preparation method comprises the following stepsof melting a pure aluminum ingot, adding silicon, manganese and a titanium additive, so that the pure aluminum ingot is alloyed; (2) adding aluminum beryllium and an aluminum-cerium alloy, and melting to obtain an alloy melt; (3) adding a pure magnesium ingot, completely melting, and refining by using a sodium-free refining agent in an argon atmosphere. According to the invention, and the alloy material is mainly applied to a mobile phone middle plate.

Description

technical field [0001] The invention relates to an aluminum alloy material and its preparation, more specifically, to a high-strength, high-toughness anti-oxidation aluminum-magnesium alloy material for a 5G mobile phone mid-board and a preparation method thereof. Background technique [0002] At present, aluminum-magnesium alloys can be used to prepare mobile phone mid-plates due to their excellent mechanical properties, high strength, good ductility and toughness, good corrosion resistance and good cutting performance. At present, there are generally two kinds of aluminum alloy materials for the middle board of mobile phones. Among them, one is deformed aluminum alloy, such as aluminum-magnesium alloy 6061 and 6013, which can be processed by CNC (computer numerical control machine tool). This deformed aluminum alloy has good mechanical properties due to heat treatment and strengthening, such as aluminum-magnesium alloy 6061 in the T6 state, the tensile strength is ≥310MPa...

AI Technical Summary

Problems solved by technology

However, the manufacturing efficiency of this type of aluminum-magnesium alloy is low and the cost is high

The other is to use ADC12 aluminum alloy die-casting. This aluminum alloy material has low cost, high efficiency and good casting performance, but because ordinary die-casting cannot be heat treated, its mechanical properties are relatively poor.