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High Chromium Alloy Casting Balls are high-chromium-content alloy castings used for grinding media in industries such as mining, cement, thermal power, and chemical processing . These balls feature high hardness (HRC 58–68), low wear, good toughness, and enhanced wear resistance, which improves mill production capacity and concentrate recovery .
Common specifications include diameters from 10 mm to 150 mm, with chromium content typically ranging from 10% to 30% (e.g., ZQCr10, ZQCr17, ZQCr28) . The chemical composition generally includes C (2.0–3.5%), Cr (10–30%), and trace amounts of elements like Si, Mn, P, S, and Mo .
Manufacturing involves controlled casting temperatures (1350–1420°C), proper gating and riser design (to ensure quality and avoid defects), and heat treatment processes (e.g., normalizing and low-temperature tempering) to achieve optimal hardness (≥HRC50) and toughness .
Applications include wet and dry ore grinding, ball mills, and tower mills . Products are sold domestically and exported worldwide to countries like the USA, Japan, South Korea, and Australia .
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