Specialized chemical additives used to refine grain structure in high-purity magnesium alloy billets during casting processes.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Density | 1.8-2.5 g/cm³ | |
| Addition Rate | 0.1-0.5 wt% of melt | |
| Melting Point | Varies by composition (650-750°C) | |
| Storage Conditions | Dry, inert atmosphere, <40°C | |
| Grain Size Reduction | 50-80% (typically from 500-1000 μm to 100-200 μm) | |
| Reaction Temperature | 680-720°C |
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This component is used in the following industrial products
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They reduce grain size, which increases yield strength through Hall-Petch strengthening, improves ductility by distributing stress more evenly, enhances fatigue resistance, reduces hot tearing susceptibility, and improves surface finish and machinability.
Typically 680-720°C, which is 20-50°C above the alloy liquidus temperature. This ensures complete dissolution and uniform distribution while avoiding excessive temperature that could cause element loss or reaction with furnace lining.
No, compatibility varies. Zirconium-based refiners work well with zirconium-free alloys but can cause issues with aluminum-containing alloys. Aluminum-based refiners are used for Al-containing alloys. Rare earth refiners offer broader compatibility but at higher cost.
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