Strict control of magnesium melt temperature and composition in die casting is critical because:
Excessively high temperatures exacerbate oxidation, generate inclusions, and reduce corrosion resistance.
Excessively low temperatures lead to poor fluidity and premature solidification, resulting in internal defects.
Impurity elements (e.g., Fe, Cu) significantly accelerate corrosion, necessitating strict limits on their content.
For die-casting release agents, the requirements are: the agent must reduce corrosion in magnesium alloys and facilitate the filling of molten magnesium during casting.
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