Delivery Time:7-45days according to your quantity.
Certification:ISO 9001:2008,ISO14001
Diameter15-150mm high Impact Toughness B2 material Grinding Balls for Mining
Breif Description:
Size: 20-150mm Inspection: SGS/BV/TUV
Origin: Shandong Province, China
| 1) 60Mn Forged grinding ball | HRC58-65 | ≥HRC44 |
C: 0.52-0.65; Si: 0.15-0.37; Mn: 0.6-1.2; S & P: 0.04Max; Cr: 0.25Max |
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| 2) B2 Forged grinding ball | HRC60-68 | ≥HRC55 |
C: 0.75-0.90; Si:0.17-0.37; Mn:0.7-0.9; P: 0.035 MAX; S: 0.035MAX; Cr:0.40-0.70. |
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| 3) B3 Forged grinding ball | HRC60-68 | ≥HRC55 | C:0.55-0.65; Si:0.2-0.37; Mn:0.75-0.9; Cr:0.85-1.2;S/P≤0.03; | |||||
| 4) B4 Forged grinding ball | HRC60-68 | ≥HRC58 | C:0.58-0.66; Si:1.6-1.9; Mn:0.65-0.80; Cr:0.7-0.9; S/P≤0.03; | |||||
| 3) High chrome cast grinding ball | HRC58-65 | ≥HRC55 |
Cr:11-27; C: 2.0-3.0; Si:1.0Max; Mn: 0.5-1.5; S & P:0.10Max; |
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| 4) Low chrome cast grinding ball | HRC48-55 | ≥HRC46 |
Cr:1-3; C: 2.2-3.6; Si:1.0Max; Mn: 0.5-1.5; S & P:0.10Max; |
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| 5) Medium chrome cast grinding ball | HRC50-60 | ≥HRC48 |
Cr:4-10; C: 2.2-3.6; Si:1.0Max; Mn: 0.5-1.5; S & P:0.10Max; |
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DIA 20 DIA 25 DIA 30 DIA 40 DIA 50 |
+2 -1 |
32 64 110 263 513 |
31250 15625 9090 3802 1949 |
≥12 | ||||
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Nominal diameter (mm) |
Diametrical tolerance (mm) |
Weight of Single of grinding ball in average |
Number of piece of One ton grinding ball in average |
Impact toughness |
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DIA 60 DIA 70 DIA 80 DIA 90 DIA 100 |
+3 -2 |
888 1410 2104 2996 4110 |
1126 709 475 333 243 |
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DIA 110 DIA 120 DIA 130 |
+4 -2 |
5457 7102 9030 |
182 140 110 |
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DIA 140 DIA 150 |
+4 -3 |
11278 13871 |
88 72 |
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Feature:
1) High Hardness: The surface hardness of forged and rolling balls is to 60-65 HRC and volume hardness is to 60-63 HRC
2) High Impact Toughness: The impact toughness is more than 12 J/cm2;
3) Low Broken Rate: The actual broken rate is not higher than 1%;
4) Even Wear-resistance: The loss of ball round rate is 50-300 g/ton.
The production process of the forged grinding balls
1). Raw material:
All the material is qualified with certificate and made in the Chinese largest steel production enterprise.
2). Different steel specifications ccording to the clients's requirements.
Main Steel Material :C45 Steel;60Mn Steel;B2 Steel
3). Steel Cutting:
the steel bars should be cut into small pieces according to the size of steel balls required by the order.
4). Heating:
we use the electric furnace instead of the traditional coal stove, the biggest advantage is that all the steel bars can accept the most approriate temperature during the heating progress. It affect the hardness and toughness directly.
5). Hammer forging:
The raw material is forged to a certain deformation by the air hammer, when the compression ratio increased, the micro-structure become more compact so that t
