Noble-metal-modified aluminum alloy material and preparation method thereof

Abstract

The invention discloses a noble-metal-modified aluminum alloy material and a preparation method thereof. The alloy comprises the following components in percentage by weight: 5.0-6.5% of Cu, at most 0.1% of Mn, at most 0.5% of Mg, at most 0.15% of Zn, at most 0.2% of Ti, at most 0.5% of Zr, at most 0.6% of Bi, at most 0.6% of Pb, and the balance of Al and inevitable trace impurities; the noble metal modifier accounts for 1ppm-0.1% of the total amount; and the content of any single impurity element is at most 0.05%, and the total content of the impurity elements is at most 0.1%. The invention can effectively reduce the generation of pinholes, and has the effect of high modification efficiency.

Description

technical field [0001] The invention relates to an aluminum alloy material and a preparation method thereof, in particular to a high-performance aluminum alloy material improved by an iron carbonyl complex and a preparation method thereof. Background technique [0002] With the rapid development of the automobile industry and the aerospace industry, the demand for aluminum ingots in the entire market is increasing, and the quality requirements are getting higher and higher. However, because aluminum alloy requires strict process control to produce high-quality products. Therefore, a considerable part cannot meet the needs of actual production because the product quality is not up to standard. Although many enterprises have undergone a lot of technical improvements, the feedback from customers on quality problems has not decreased. At present, the main problem of aluminum alloy quality is that the pinhole grade of aluminum alloy cannot meet the actual requirements, and hydro...

AI Technical Summary

Problems solved by technology

Therefore, a considerable part cannot meet the needs of actual production because the product quality is not up to standard. Although many enterprises have undergone a lot of technical improvements, the feedback from customers on quality problems has not decreased.

At present, the main problem of aluminum alloy quality is that the pinhole grade of aluminum alloy cannot meet the actual requirements, and hydrogen is the main cause of aluminum alloy pinholes. The main source of hydrogen is the decomposition of water vapor at the high temperature of aluminum liquid.

[0003] At present, the prevention of pinholes is all solved from the casting process, for example: firstly, the serious oxidation and corrosion deposits in the cast aluminum alloy raw materials must be removed, and in addition, the degassing and refining should be strengthened; the thickness of the metal coating ( If the coating is too thick, pinholes are likely to occur); the mold temperature should not be too high; necessary rapid cooling measures (such as copper inlay or water cooling, etc.) should be taken for the thick wall part of the mold; Cores, etc., can obtain certain effects, but cannot fundamentally solve the occurrence of pinholes, especially in thick sand castings, it is difficult to avoid the occurrence of pinholes

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