Grain Refiners

Grain Refiners with a number of different titanium-to-boron, titanium-to-carbon or titanium-to-aluminium ratios are available to accommodate special conditions which may exist in the user’s plant.

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Close control of the cast structure is a major requirement in the production of high quality aluminium alloy products. The most effective way to provide a fine and uniform as-cast grain structure is to add nucleating agents to the melt to control crystal formation during solidification.

Grain Refiners with a number of different titanium-to-borontitanium-to-carbon or titanium-to-aluminium ratios are available to accommodate special conditions which may exist in the user’s plant. In selecting the proper aluminium grain refiner alloy, the user must take into consideration conditions such as the alloy to be treated, the quantity of recycle or secondary aluminium used, the desired grain size in the product, and the melting and casting practice used.

Product Types

ln casthouse applications, the control of grain size is absolutely essential in maintaining product consistency and quality, reducing costs, and maintaining high levels of productivity. The controlled addition of AMG Aluminum’s titanium boron aluminium grain refiners to molten aluminium releases nucleant particles that promote equiaxed, fine grain structures throughout the cast alloy, thus avoiding formation of columnar crystals. Casting speed can also be increased.

The addition of a titanium-boron-aluminium grain refiner improves homogeneity and allows for a uniform distribution of alloying elements, reduces porosity, eliminates hot tearing in cast structures, improves responsiveness to subsequent heat treatment, and enhances mechanical properties and machinability in the fabrication process.

Continuous injection of titanium-boron-aluminium rod is a highly effective treatment for all aluminium alloys.

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Aluminium’s mechanical and physical properties are enhanced with the use of alloying elements. These alloying elements are commonly referred to as hardeners. Aluminium-based master alloys which contain the hardener elements in high concentrations, provide a convenient and economical way to add them to aluminium to achieve desired properties. These master alloys readily go into solution at lower liquid aluminium temperatures, thus minimizing dross formation and solubility of hydrogen. Lower furnace temperatures also mean reduced energy consumption and longer furnace life.

Titanium aluminium master alloys provide a precise and consistent source of rapidly dissolving titanium. Titanium provides an important contribution to grain refinement; it is known for its powerful effect of grain growth restriction which helps control the as-cast structure of aluminium alloys.

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ln casthouse applications, the control of grain size is absolutely essential in maintaining product consistency and quality, reducing costs, and maintaining high levels of productivity. The controlled addition of AMG Aluminum’s titanium carbon aluminium grain refiners to molten aluminium releases nucleant particles that promote equiaxed, fine grain structures throughout the cast alloy, thus avoiding formation of columnar crystals. Casting speed can also be increased.

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