high hardness 30mm casting grinding balls for ball mill
high hardness 30mm casting grinding balls for ball mill
1.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 |
2.Chemical composition
| Name | Brand
| Chemical composition(%) | ||||||||
| C | Si | Mn | Cr | Mo | Cu | Ni | P | S |
| |
| Chrome alloy casting iron ball | 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 | |
| ZQCr5 | 2.1-3.3 | 1.5max | 0.3-1.5 | 4.0-6.0 | 0-1.0 | 0-0.8 | - | ≤0.10 | ≤0.10 | |
| ZQCr2 | 2.1-3.6 | 1.5max | 0.3-1.5 | 1.0-3.0 | 0-1.0 | 0-0.8 | - | ≤0.10 | ≤0.10 | |
3.Technical specification
| Name | Brand | Diameter (mm) | Hardness (HRC) | Breakage rate | Impact value (J/cm²) | Drop times (times) | Micro structure |
| Chrome alloy casting iron ball
| 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 | |
| ZQCr5 | 17-150 | >47 | <1% | >2 | ≥10000 | M+C | |
| ZQCr2 | 17-150 | >45 | <1% | >1.5 | ≥8000 | P+C |
Production process of Chrome alloy casting iron ball
Raw material→Secientic proportioning→Electric furnace smelting→Assay before furnace→Mould forming→Polishing→Heat treatment→Packing
1.Bag:diameter17-150mm 1000kg/bag
2.Drum:diameter17-25mm 1000kg/drum
diameter30-50mm 950kg/drum
diameter60-70mm 900kg/drum
diameter80-90mm 850kg/drum
diameter100-150mm 800kg/drum
20feet container:25bags or 25-32drums
40feet container:27bags or27-34drums
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