Aluminum silicon lanthanum boron quaternary intermediate alloy and preparing method thereof

A master alloy and aluminum-silicon technology, which is applied in the field of aluminum-silicon-lanthanum-boron quaternary master alloy for casting aluminum-silicon alloy and its preparation field, can solve the problems of inapplicability to mass production, serious burning loss, and low yield of elements. Achieve excellent refinement effect, long-lasting effect

Active Publication Date: 2016-10-26
SOUTHEAST UNIV
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  • Abstract
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  • Application Information

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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-t...

Method used

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  • Aluminum silicon lanthanum boron quaternary intermediate alloy and preparing method thereof
  • Aluminum silicon lanthanum boron quaternary intermediate alloy and preparing method thereof
  • Aluminum silicon lanthanum boron quaternary intermediate alloy and preparing method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: The preparation method of Al-Si-La-B master alloy in this embodiment is as follows:

[0033] Step 1: using industrial pure aluminum, crystalline Si, Al-10La master alloy and Al-3B master alloy as raw materials, the mass ratio of the four raw materials is 1:0.2:0.5:0.8, weighed and dried in an oven for later use;

[0034] Step 2: Crush the crystalline silicon into particles with an average size of about 1mm, and evenly spread it on the bottom of the graphite clay crucible;

[0035] Step 3: Place the graphite clay crucible in step 2 in a crucible resistance furnace, place the dried industrially pure aluminum on the crystalline Si particles, melt at 850°C, and keep it warm for 2 hours to obtain a uniform aluminum-silicon melting body.

[0036] Step 4: Add the dried Al-3B master alloy and keep it at 850°C for 20 minutes to obtain a uniform melt.

[0037] Step 5: In the homogeneous melt obtained in step 4, add the Al-10La master alloy at 880°C and keep it war...

Embodiment 2

[0043] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass ratio of the four raw materials in step 1 is 1:0.4:0.8:1.2, and the others are the same as Embodiment 1.

Embodiment 3

[0044] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the mass ratio of the four raw materials in Step 1 is 1:0.3:0.7:1, and the others are the same as Embodiment 1.

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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...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C21/02C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/02
Inventor 陆韬潘冶李陈林顾腾飞景力军
Owner SOUTHEAST UNIV
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