Controlling grain size in cast structures is essential to achieving high productivity, consistent product quality and reducing costs. The addition of titanium carbon aluminium grain refining agent to liquid aluminium releases nucleant particles, preventing columnar crystal formation, thus achieving equiaxed, fine grain structures throughout the casting.
Titanium Carbon Aluminium Grain Refiners
Master alloys having different titanium-to-carbon ratios are available to be suitable for speial conditions that may be present in the facility of the user. The selection of the grain refiner alloy is done based on the alloy that needs to be treated, the amount of recycle or secondary aluminum used, the desired grain size in the product, and the melting and casting practice used.
Applications for Titanium Carbon Aluminium
Titanium carbon aluminium alloys are suitable for numerous commercial applications, including bright trim, lithographic and fine micron foils, Titanium carbon aluminim has proven itself to be a highly reliable and effective choice.
Titanium carbon aluminim resistance to poisoning by Zr in 7XXX aerospace alloys makes it the premier choice for grain refining in this application.
For the high-magnesium-content 5XXX alloys, Titanium carbon aluminium provides improved surface finishes through the reduction of magnesium oxide build up. Titanium carbon aluminium is not susceptible to agglomerations, providing the possibility of prolonged filter life and fewer defects in final products.
Recycling Aluminium Alloys Containing TiB2 and TiC
Recycling issues have been examined extensively in a number of alloy systems and in practice, indicating there is no problem in having both TiB2 and TiC particles present for grain refining.