Mill Grinding Balls, Grinding Cylpebs and Grinding Rods
High Chromium Cast Iron Grinding Balls
PRODUCT PARAMETERS
Description
High Chromium Cast Grinding Balls are a premium type of cast grinding media known for their superior wear resistance and durability.
Diameter tolerance：
| Diameter(mm) | Φ<30 | 30<Φ<60 | 60<Φ<80 | 80<Φ<100 | Φ>100 |
| Diameter tolerance(mm) | +1,-1 | +1.5,-1 | +2,-1 | +2.5,-1 | +3,-1 |
Technical specification：
| Material Gr. | Diameter(mm) | Hardness(HRC) | Breakage rate | Impact value(J/cm²) | Drop times(times) | Micro structure |
| ZQCr26 | 17-150 | >58 | <1% | >7 | ≥12000 | M+C |
| ZQCr20 | 17-150 | >58 | <1% | >6 | ≥12000 | M+C |
| ZQCr15 | 17-150 | >58 | <1% | >5 | ≥12000 | M+C |
| ZQCr12 | 17-150 | >58 | <1% | >3.5 | ≥12000 | M+C |
| ZQCr8 | 17-150 | >58 | <1% | >3 | ≥12000 | M+C |
Chemical composition
| Brand | Chemical composition(%) | ||||||||
| C | Si | Mn | Cr | Mo | Cu | Ni | P | S | |
| ZQCr26 | 2.0-3.3 | 1.2max | 0.3-1.5 | >23.0-30.0 | 0-3.0 | 0-1.2 | 0-1.5 | ≤0.10 | ≤0.06 |
| ZQCr20 | 2.0-3.3 | 1.2max | 0.3-1.5 | >18.0-23.0 | 0-3.0 | 0-1.2 | 0-1.5 | ≤0.10 | ≤0.06 |
| ZQCr15 | 2.0-3.3 | 1.2max | 0.3-1.5 | >14.0-18.0 | 0-3.0 | 0-1.2 | 0-1.5 | ≤0.10 | ≤0.06 |
| ZQCr12 | 2.0-3.3 | 1.2max | 0.3-1.5 | >10.0-14.0 | 0-3.0 | 0-1.2 | 0-1.5 | ≤0.10 | ≤0.06 |
| ZQCr8 | 2.1-3.3 | 2.2max | 0.3-1.5 | 7.0-10.0 | 0-1.0 | 0-0.8 | – | ≤0.10 | ≤0.06 |
Features:
- Material Composition – Typically contain 10-32% chromium (Cr), along with carbon (C), manganese (Mn), and molybdenum (Mo) for enhanced properties.
- High Hardness – Achieve 58-68 HRC, providing excellent resistance to wear and deformation.
- Superior Wear Resistance – High Cr content forms hard carbides, significantly reducing wear in grinding applications.
- Good Corrosion Resistance – Ideal for wet grinding and acidic environments, such as mineral processing.
- Brittleness – More brittle than low-Cr or forged grinding balls, requiring proper heat treatment to balance hardness and toughness.
- Heat Treatment – Undergo quenching and tempering to optimize microstructure and improve performance.
- Applications – Used in cement plants, mining, and power stations, especially in environments requiring high wear and corrosion resistance.
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FAQs
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