Features:
It is a high-efficiency grain refiner suitable for A356 casting alloy, which has a strong ability to refine α-Al in A356 casting alloy, and can strengthen the modification effect of AlSr alloy on β-Si to a certain extent. The heterogeneous nucleation core is LaB6,with high melting point (2715℃), high hardness, low thermal expansion rate, and stable chemical properties. It can significantly enhance the wear resistance and hardness of cast alloys, improve fluidity, and enhance mechanical properties.
Advantages of AlLaB (AlLa3B1.5) compared with AlTiB ( AlTi5B1) :
1. AlLaB has a strong refinement ability on A356 alloy,the addition amount can be reduced to 1/2~1/3 of AlTiB.
2. AlLaB can strengthen the modification of AlSr alloy and help to reduce 1/2 addition amount of AlSr alloy.
3. The refinement effect of AlLaB can last 300mins without decline,which can further ensure the stability of the castings.
4. Rare earth elements can reduece the hydrogen, oxygen and sulfur content in aluminum and aluminum alloys, and will form binary compounds with harmful impurities with low melting point, which will float to slag, thus purifying aluminum liquid and improving product quality.
5. AlLaB has low Ti content and the LaB6 particles have no aggregation tendency, suitable for the production processes using large amount of foundry returns.
6. Adding 1% AlLaB, the average grain sizes of A356 casting can reach to 50~60 μm, which can make the as-cast castings to obtain super high strength and plastic toughness.
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