Chemical Composition (%)
|
Name
|
Designation
|
Chemical Composition (%)
|
|
C
|
Si
|
Mn
|
Cr
|
Mo
|
P
|
S
|
|
High Cr Cast Grinding Balls
|
ZQCr26
|
2.0～2.8
|
≤1.0
|
≤1.5
|
22～28
|
≤1.0
|
≤0.10
|
≤0.08
|
|
ZQCr20
|
2.0～2.8
|
≤1.0
|
≤1.5
|
18～22
|
≤1.5
|
≤0.10
|
≤0.08
|
|
ZQCr17
|
2.0～3.0
|
≤1.0
|
≤1.5
|
15～18
|
≤1.5
|
≤0.10
|
≤0.08
|
|
ZQCr13
|
1.7～3.0
|
≤1.0
|
≤1.5
|
11～15
|
≤1.5
|
≤0.10
|
≤0.08
|
|
Common High Cr Cast Grinding Balls
|
ZQCr10
|
According to customer requirements in the contract agreement.
|
Properties and Microstructure
|
Name
|
Designation
|
Hardness(HRC)
|
ak(j/cm2)
|
Microstructure
|
Time of Falling Balls
|
|
|
|
|
High Cr Cast Grinding Balls
|
ZQCr26
|
≥56
|
≥45
|
≥4.0
|
M+C
|
≥8000
|
|
ZQCr20
|
≥56
|
≥45
|
≥4.0
|
≥8000
|
|
ZQCr17
|
≥56
|
≥45
|
≥4.0
|
≥8000
|
|
ZQCr13
|
≥56
|
≥45
|
≥4.0
|
≥8000
|
Low Chromium Grinding Ball Chemical Composition
|
Designation
|
Chemical Composition (%)
|
|
C
|
Si
|
Mn
|
Cr
|
Mo
|
P
|
S |
|
ZQCr2
|
2.2～3.5
|
≤1.2
|
0.5-1.5
|
1.5～3.0
|
≤1.0
|
≤0.1
|
≤0.1 |
Machanics Properties and Microstructure
|
Designation
|
Hardness(HRC)
|
Impact Value ak(j/cm2)
|
Microstructure
|
Time of Falling Balls
|
|
ZQCr2
|
≥45
|
≥1.6
|
P+C
|
≥8000
|
Micro Ball Specification
Chemical Composition (%)
|
Name
|
C
|
Si
|
Mn
|
Cr
|
Mo
|
Cu
|
S
|
P
|
|
High Cr micro Ball
|
1.7-3.0
|
≤1.0
|
0.4-1.2
|
10-12
|
0-0.5
|
0-0.8
|
≤0.08
|
≤0.1
|
|
Low Cr micro Ball
|
2.2-3.5
|
0.3-1.2
|
0.5-1.5
|
1.5-3.0
|
0-0.5
|
0-0.8
|
≤0.1
|
≤0.1
|
Mechanical Properties of Products
|
Name
|
Microstructure
|
Hardness(HRC)
|
Impact Value ak(j/cm2)
|
|
High Cr micro Ball
|
M+C
|
≥56
|
≥3.0
|
|
Low Cr micro Ball
|
P+C
|
≥45
|
≥1.6
|
Specification and Avoirdupois
|
Ball Diameter(mm)
|
Weight of Each Ball(kg)
|
Pcs/ton
|
|
Φ20
|
0.0322
|
31056
|
|
Φ25
|
0.063
|
15873
|
|
Φ30
|
0.11
|
9091
|
|
Φ40
|
0.257
|
3891
|
|
Φ50
|
0.50
|
2000
|
|
Φ60
|
0.867
|
1153
|
|
Φ70
|
1.37
|
729
|
|
Φ80
|
2.05
|
487
|
|
Φ90
|
2.9
|
345
|
|
Φ100
|
4.00
|
250
|
|
Φ110
|
5.3
|
188
|
|
Φ120
|
6.80
|
147
|
|
Φ125
|
7.75
|
129
|
|
Φ130
|
8.74
|
114
|
|
Φ150
|
13.5
|
74
|
|
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