Aluminum -Yttrium Intermediate Alloy Used in Aluminum Alloy
 
Rare earth can be used as additives and alloy elements in the Aluminum alloy. But a single rare earth the disadvantages of high chemical activity and oxidation, so it is not convenient to use, store and transport. As a result, the cost is high. Besides, with very high melting point and high density, it is not easy to be added into magnesium. So usually by being made into Al-Re intermediate alloy, not only can we reduce oxidation loss and costs, but also it is easy to store, transport, add in, so that we can get alloy with stable composition and reliable quality. Our company makes the fullest use of resource advantage to do constant research and develop high yttrium intermediate alloy of rare-earth magnesium and rare-earth aluminum, so as to reduce the pressure of production costs caused by direct addition of rare-earth metal.
First, the role of yttrium heavy rare earths in aluminium and aluminium alloy

1, refining, purification effect Yttrium aluminum alloy in the degassing effect is best.And the sodium salt, strontium salt or aluminum - strontium metamorphism causes inspiratory phenomenon, generate a lot of pinhole in the casting.In addition, rare-earth yttrium aluminum also with oxygen, nitrogen and sulfur and  refractory compounds, mostly in the form of slag discharge during the process of smelting.At the same time it also can reduce the high poly iron, silicon phase at the grain boundary, improve the grain boundary strength, improve the plasticity.

2, metamorphism, refined, organization function The biggest advantages of heavy rare earth yttrium metamorphic make needle, lamellar eutectic silicon granular, reduce fragmentation primary silicon;Can significantly refine grain and secondary dendritic spacing;Heavy rare earth yttrium metamorphism with remelting sex and long-term sex.

3, the performance impact Yttrium heavy rare earth can improve the heat resistance of aluminum alloy, improve the strength, elongation, abrasion resistance and can also reduce the thermal expansion coefficient;Improve the surface of the aluminum alloy uniform corrosion resistance and acid corrosion resistance.In the industrial pure aluminum and Al - Mg - Si adding a conductive metal yttrium can improve conductivity and lower resistivity.

Product Standards Q/LY001-2015
 
 The use of three, middle yttrium aluminum alloy

Among 1, yttrium aluminum alloy with graphite bell (iron bell) pressure into the alloy melt, and slightly to swim around, prevent partial poly, rare earth rare earth rapidly spread evenly into the liquid aluminum.

2, pay attention to the mastery of yttrium addition amount, the amount of general 0.15% < Re omega % < 0.3%.Rare earth join excessive or insufficient, not only can not improve the performance of the aluminum alloy, also will affect the normal use of aluminum alloy, and even cause scrap material.

3, in order to obtain stable metamorphic organization, as far as possible improve metamorphic temperature, metamorphic after strengthening the quiet place.

4, rare earth for deoxidizing and desulfurizing agent in advance, when adding rare earth after deoxidization, desulphurization effect is good, not only have deep deoxidization, desulphurization effect, still can very good control of oxygen, sulfur inclusions form

5, rare earth metamorphism is affected by the critical cooling rate, try to improve the cooling speed

6, but also pay attention to prevent conflict of rare earth elements and other elements, covering flux, reduce the halogen elements can influence the sex of the alloy.

7,Attached photos are for reference only,