Place of Origin: | Shandong |
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Location: | Jinan, Shandong, China (Mainland) |
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Business Type: | Manufacturer |
Model No.: | B2 60MN 65MN 45# |
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Large Quantitiy Forged Steel Grinding Balls mill balls for cement plant
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 the hardness and the toughness can be improved.
6). Heat treatment:
Both the water quenching heat treatment production line and our own temperature control technics are important.
We have mature production technicians responsible for the heat treatment process as we know this process affect the grinding balls performance directly.
7). Quality Control.
Raw material test before production
Hardness test Drop Test Impact Test Core pulling Test after production
SGS test before delivery
Certificate: ISO 9001:2008
Specification:
Brand | Material | C | Mn | Si | Cr | P/S | Ni |
DT-1 | 50Mn | 0.48-0.56 | 0.65-1.0 | 0.17-0.37 | 0.15max | 0.035max | 0.05max |
DT-2 | 60Mn | 0.57-0.65 | 0.70-1.1 | 0.17-0.37 | 0.25max | 0.035max | 0.05max |
DT-3 | 65Mn | 0.62-0.75 | 0.90-1.2 | 0.17-0.37 | 0.25max | 0.035max | 0.10max |
DT-4 | 75MnCr(B2) |
0.72-0.85 |
0.70-0.90 | 0.17-0.35 | 0.40-0.60 | 0.035max | 0.15max |
DT-5 | B3 | 0.50-0.65 | 0.4-1.0 | 1.40-1.80 | 0.77-1.10 | 0.035max | 0.15max |
DT-6 | 45# | 0.42-0.48 | 0.50-0.80 | 0.17-0.37 | 0.15max | 0.035max | 0.05max |
Specification of Forged Steel Grinding Ball | ||||
Diameter | Diameter Tolerance |
Weight / ball | Surface Hardness | Impact Toughness |
(mm) | (mm) | (g) | (HRC) | (j/cm 2 ) |
Φ20 | ±2 | 33 | 60-68 |
≥12J/CM2 |
Φ25 | ±2 | 65 | ≥12J/CM2 | |
Φ30 | ±2 | 110 | ≥12J/CM2 | |
Φ40 | ±2 | 263 | ≥12J/CM2 | |
Φ50 | ±2 | 513 | ≥12J/CM2 | |
Φ60 | +3,-1 | 889 | ≥12J/CM2 | |
Φ70 | +3,-1 | 1410 | ≥12J/CM2 | |
Φ80 | +3,-1 | 2105 | ≥12J/CM2 | |
Φ90 | +3,-1 | 2996 | 55-63 | ≥12J/CM2 |
Φ100 | +3,-1 | 4110 | ≥12J/CM2 | |
Φ110 | +4,-2 | 5457 | 53-60 |
≥12J/CM2 |
Φ120 | +4,-2 | 7102 | ≥12J/CM2 | |
Φ130 | +4,-2 | 9030 | ≥12J/CM2 | |
Φ140 | +4,-2 | 11278 | ≥12J/CM2 | |
Φ150 | +4,-2 | 13870 | ≥12J/CM2 |
Testing:
Quality control for each production shift (4hours/Shift);
Hardness, chemical elements and impact testing after production for each production shift;
SGS –third party testing before each delivery
Packing:
1.Bags:1000KG polypropylene bags which are highly re