Wet grinding mill Best Quality DIA 20mm Forged Steel Ball for mining
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.
| Material | C | Mn | Si | Cr | S | P |
| 45# | 0.42-0.50 | 0.50-0.80 | 0.17-0.37 | ≤0.25 | ≤0.025 | ≤0.025 |
| 60Mn | 0.57-0.65 | 0.70-1.0 | 0.17-0.37 | ≤0.25 | ≤0.025 | ≤0.025 |
| 65Mn | 0.62-0.70 | 0.90-1.20 | 0.17-0.37 | ≤0.25 | ≤0.035 | ≤0.035 |
| 40Cr | 0.37-0.44 | 0.50-0.80 | 0.17-0.37 | 0.80-1.10 | ≤0.035 | ≤0.035 |
| Ball diameter | Diameter tolerance | Weight of single ball in average | Number of piece of one ton ball in average | Surface hardness | Core hardness | Impact toughness |
| (mm) | (mm) | (g) | (pcs) | (HRC) | (HRC) | (J/cm2) |
| Φ20 | +2,-1 | 32 | 31250 | 60-67 | 57-62 | ≥12 |
| Φ25 | +2,-1 | 64 | 15625 | 60-67 | 57-62 | ≥12 |
| Φ30 | +2,-1 | 110 | 9090 | 60-67 | 57-62 | ≥12 |
| Φ40 | +2,-1 | 263 | 3802 | 60-67 | 57-62 | ≥12 |
| Φ50 | +2,-1 | 513 | 1949 | 60-67 | 57-62 | ≥12 |
| Φ60 | +3,-2 | 888 | 1126 | 58-65 | 50-56 | ≥12 |
| Φ70 | +3,-2 | 1410 | 709 | 58-65 | 50-56 | ≥12 |
| Φ80 | +3,-2 | 2104 | 475 | 58-65 | 50-56 | ≥12 |
| Φ90 | +3,-2 | 2996 | 333 | 58-65 | 50-56 | ≥12 |
| Φ100 | +3,-2 | 4110 | 243 | 58-65 | 50-56 | ≥12 |
| Φ110 | +4,-2 | 5457 | 182 | 55-63 | 48-55 | ≥12 |
| Φ120 | +4,-2 | 7102 | 140 | 55-63 | 48-55 | ≥12 |
| Φ130 | +4,-2 | 9030 | 110 | 55-63 | 48-55 | ≥12 |
| Φ140 | +4,-2 | 11278 | 88 | 55-63 | 45-50 | ≥12 |
| Φ150 | +4,-2 | 13871 | 72 | 55-63 | 45-50 | ≥12 |
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
Shipping:
1.Port of Loading: Qingdao Port,China
2.Partial shippment allowed
3.By DHL/TNT express for samples order.Door to door to delivery;
4.Appointed freight forwarder by customers is acceptable
Our Services:
1. Free samples for your test before orders;
2. Soonest delivery time ;
3. Cooperate with many famours shipping companies,and sent the goods to your port safe and in time;
4. Any feedback after sales would get our soonest reply.
WE LOOK FORWARD TO THE OPPORTUNITY TO DISCUSS HOW WE CAN BECOME A PARTNER IN YOUR SUPPLY CHAIN SOLUTION .
