Forged Ball
1.Feature
1) In general, forged steel ball has high hardness: surface hardness to 55-68 HRC, volume hardness of 50-63 HRC
2) impact toughness high: impact toughness more than 12 J / cm2.
3) broken rate is low: the actual broken rate is not higher than 1%.
4) loss of grinding forged steel ball round rate is low.
2.Chemical composition of Forged Grinding Ball
Based on material,the forged steel balls are defined into 7 brands. And The chemical composition is shown in the following:
Brand
Material
C
Mn
Si
Cr
S
P
V
TITLE -1
50MN
0.48-0.56
0.70-1.0
0.17-0.37
≤0.25
≤0.035
≤0.035
TITLE -2
60MN
0.57-0.65
0.70-1.0
0.17-0.37
≤0.25
≤0.035
≤0.035
TITLE -3
65MN
0.60-0.70
0.90-1.20
0.17-0.37
≤0.25
≤0.035
≤0.035
TITLE -4
75Mn
0.72-0.92
0.17-0.37
0.17-0.37
0.4-0.6
≤0.035
≤0.035
TITLE -5
75MnCr
0.70-0.85
0.7-0.8
0.17-0.37
0.2-0.7
≤0.03
≤0.03
TITLE -6
75SiMn
0.70-0.90
0.7-1.2
0.4-0.8
≤0.25
≤0.03
≤0.03
TITLE -7
Wear-resistant Alloy
0.5-0.65
0.4-1.0
1.4-1.8
0.9-1.2
≤0.03
≤0.03
0.1-0.2
3.Material and Chemical Composition of Casting Grinding Ball
Based on material,the casting steel balls are defined into 6 brands. And The chemical composition is shown in the following:
Name
Material
C
Si
Cr
Mn
S
P
TITLE -8
Cr-22-32%
2.0-2.8
≤1.0
22-32
0.5-2.0
≤0.06
≤0.08
TITLE -9
Cr-17-22%
2.0-2.8
≤1.0
17-22
0.5-2.0
≤0.06
≤0.08
TITLE -10
Cr-15-17%
2.2-3.0
≤1.0
15-17
0.5-2.0
≤0.06
≤0.08
TITLE -11
Cr-11-14%
2.2-3.2
≤1.0
11-14
0.5-2.5
≤0.06
≤0.08
TITLE -12
Cr-5-10%
2.1-3.2
≤1.2
5-10
0.5-1.5
≤0.06
≤0.08
TITLE -13
Cr-1.5-3%
2.2-3.5
≤1.2
1.5-3
0.5-1.5
≤0.06
≤0.08
4.Specification of Casting Grinding Ball
1)High chrome cast balls
Size: 20mm-120mm
Hardness:HRC58-65; Chrome content:11-14%
2)Low chrome cast balls
Size: 20mm-120mm
Hardness:HRC45-55; Chrome content:1-3.5%
5.Main Process of Forged Steel Ball
(1)Raw material.(2)Cutting.(3)Heating.(4)Forging.(5)Quenching.(6)Tempering.(7)Testing.(8)Qualified Products.(9)Packing
6.Main Process of Casting Grinding Ball
(1)Raw material.(2)Scientific Proportioning.(3)Electric Furnace Smelting.(4)Assay Before Furnace.(5)Mould Forming.(6)Polishing.(7)Heat Treatment.(8)Qualified Products.(9)Packing
7.Applied Field
1).Cement Plants 2).Mines 3).Power stations 4).Chemical Industries 5).Grinding Mill, Ball mill, Coal mill
8. Products Name
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9.Packing
1) Container Bag: Dia20mm-Dia150mm 1000Kgs/Container Bag (GWt:1002Kgs)
2) Steel Drums: Dia20mm-Dia80mm 900Kgs/Drum (GW: 915Kgs)
Dia90mm-Dia150mm 850Kgs/Drum (GW: 865Kgs)