Aluminum silicon lanthanum boron quaternary intermediate alloy and preparing method thereof

Abstract

The invention discloses an aluminum silicon lanthanum boron quaternary intermediate alloy and a preparing method of the alloy. The aluminum silicon lanthanum boron quaternary intermediate alloy can be used for casting a refined aluminum silicon alloy. Industrial pure aluminum, silicon metal, an Al-10La intermediate alloy and an Al-3B intermediate alloy are taken as a raw material, the mass ratio of the four raw materials is 1:(0.2-0.4):(0.5-0.8):(0.8-1.2), a lanthanum boron compound in the aluminum silicon lanthanum boron quaternary intermediate alloy is evenly divided by eutectic silicon, no obvious agglomeration phenomenon exists, primary aluminum grains in the cast aluminum silicon alloy with the complex component are efficiently refined, particularly, in the high-silicon alloy, the excellent refining effect is obtained, the poisoning effect generated between the high-silicon alloy and metamorphic strontium cannot be generated, and therefore the comprehensive mechanical performance of the cast aluminum alloy is improved, and the casting performance of the aluminum alloy is improved. In addition, a refining agent has hardly any induction period, the refining effect is long in duration time, meanwhile, raw materials are rich, the cost is low, atmosphere protection is not needed, and a preparing device and a preparing technology are simple.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to an aluminum-silicon-lanthanum-boron quaternary master alloy for casting aluminum-silicon alloys and a preparation method thereof. technical background [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. However, with the progress and development of society, higher requirements are put forward for the structure and performance of aluminum alloys. The key to obtaining excellent performance is to produce a fine and uniform equiaxed grain structure by melting and casting, and grain refinement has become an important means to improve the performance of aluminum alloys. At present, the most economical and effective method is to add a refiner to the aluminum melt, but due to the variety of aluminum alloys, the composition i...

AI Technical Summary

Problems solved by technology

However, the price of rare earth elements scandium and ytterbium is too high to be suitable for mass production, which seriously restricts their wide application in cast aluminum alloys

On the other hand, rare earth elements are very active in high-temperature aluminum melts, so when they are added to the melt in the form of simple rare earths, the burning loss is very serious, and the element recovery rate is very low. It is also very important to develop a new rare earth element addition process of

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