Medium chrome casting grinding ball
Chromium composition: 3.0-7.0%
Meduim chrome casting alloy grinding ball is higher hardness,lower wear rate,good toughness and less are widely used in mining, power plant, cement and magnetic materials industries.
In the using process, the surface hardness getting higher and the wear resistant getting strengthen, at the same time, the production capacity of ball mill getting improved.
Diameter(mm) | ||||||||
Φ8 | Φ10 | Φ12 | Φ15 | Φ17 | Φ20 | Φ25 | Φ30 | Φ40 |
Φ50 | Φ60 | Φ70 | Φ80 | Φ90 | Φ100 | Φ110 | Φ120 | Φ130 |
Chemical Composition | ||||||||
Name | Designation | C | Si | Mn | Cr | P | S | Mo |
Medium chrome casting grinding ball | ZQCr8 | 2.1-3.3 | ≤1.5 | 0.3-1.5 | 7~10 | ≤0.1 | ≤0.08 | 0.02-1.0 |
ZQCr5 | 2.1-3.3 | ≤1.5 | 0.3-1.5 | 4~6 | ≤0.1 | ≤0.08 | 0.02-1.0 | |
Properties and Microstructure | ||||||||
Name | Designation | Surface  Hardness（HRC | Core  Hardness (HRC) | Impact Value(J/CM2) | Microstructure | Time of falling balls | ||
Medium chrome casting grinding ball | ZQCr8 | ≥50 | ≥47 | 2 | P+C | ≥10000 | ||
ZQCr5 | ≥48 | ≥45 | 2 | P+C | ≥10000 | |||
Tolerance of Diameter | ||||||||
Diameter | Φ10-Φ25 | 25<Φ<60 | 60<Φ≤100 | 100<Φ | ||||
Tolerance of Diameter | +1.0 | +1.5 | +2.0 | +3.0 | ||||
-1.0 | -1.0 | -1.0 | -1.0 | |||||
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