Aluminum alloy round ingot casting for computer hard disk drive arm and production method of ingot casting

Abstract

The invention discloses an aluminum alloy round ingot casting for a computer hard disk drive arm. The ingot casting comprises 0.60 to 0.80% of Si, 0.10 to 0.20% of Fe, 0.90 to 1.1% of Mg, 0.10 to 0.30% of Cu, 0.10 to 0.20% of Mn, 0.10 to 0.30% of Cr, smaller than 0.03% of single impurities and the balance Al. The production method comprises the steps that pure aluminum ingot solid cold charge andelectrolytic aluminum liquid are burdened, heating and melting are carried out at the proper temperature, an electromagnetic stirrer is started to rapidly melt the cold charge, temperature uniformityand component uniformity are kept, according to the chemical components in aluminum melt, alloying treatment is carried out, slagging-off is carried out to kept melt clean, high-purity N2 and a refined powder spraying agent are adopted to carry out powder spraying refining, online filtering, slag removal and gas removal are achieved, and through casting production and uniform heating treatment, the aluminum alloy round ingot casting meeting the requirement is produced. The ingot casting is stable and uniform in component, compact in internal structure, smooth and clean in surface, excellent inmechanical performance, and high in product interior cleanness, and the method is an optimal method for producing the aluminum alloy round ingot casting for the computer hard disk drive arm.

Description

1. Technical field: [0001] The invention relates to an aluminum alloy round ingot for a computer hard disk drive arm and a production method thereof, which are used for producing an aluminum alloy round ingot for a computer hard disk drive arm. 2. Background technology: [0002] Aluminum alloy round ingot is the main basic material for the production of computer hard disk drive arm materials. It is cast into a round ingot by alloy composition ratio, after soaking treatment, and then processed by heat treatment, extrusion, quenching and other processes. [0003] After the original aluminum alloy is rolled into a round aluminum rod, it is formed by re-drawing, heat treatment, stranding, wrapping and other processes. The main requirements are that the tensile strength is ≥165Mpa, the resistivity is ≤28.64n.Ω.m, and the residual strength rate is ≥90. %, the surface requires no pores, trachoma, flash, inclusions and other defects. [0004] The main function of the computer hard ...

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Problems solved by technology

This product is mainly effectively controlled from the aspects of mechanical properties, metallography and cleanliness of the material, and there are many types of control alloys and are relatively strict, which is the reason why many manufacturers are difficult to produce stably or cannot produce