55 HRC 4 Inch Grinding Media Balls , Forged Steel Balls ISO9001
4 Inch Hardness 55 - 65HRC Grinding Media Balls Forged Steel Balls For Mining

COMPANY ENVIOMENT

PRODUCTS INTRODUCTION
Manganese steel grinding ball I is popular in Korea, Japan and North Korea, impact value is more than 12J/CM^2, manganese content is about 0.6-1.0%. This is the cheapest one in the manganese grinding balls. The performance as follow:
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Chemical Composition |
C(%) | Si(%) | Mn(%) | Cr(%) | Cu(%) | Mo(%) | P(%) | S(%) | |
| 0.62-0.70 | 0.17-0.37 | 0.9-1.0 | ≤0.25 | ≤0.25 | ≤0.3 | ≤0.035 | ≤0.035 | ||
| Size | 20-150mm(0.8inch-6inch) | ||||||||
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Hardness |
Serious | Hardness | |||||||
| Standard Hardness | 50-55HRC | ||||||||
| High Hardness | 55-60HRC | ||||||||
| Impact Value | ≥12J/CM^2 | ||||||||
| Balls Number | ≥12000times | ||||||||
| Microstructure | M+C(C-Carbide M-Martensite ) | ||||||||
| Diameter Tolerance(mm) | 20-25mm | 30-60mm | 70-90mm | 100-140mm | 150mm | ||
| ±1 | ±1.5 | +2,-2 | +2.5,-2 | +3,-2 | |||
| Roundness tolerance(%) | ≤1% | ≤1% | ≤1.5% | ≤2% | ≤2% | ||
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Forged Steel Ball Production Process |
1)Fully automatic production line of hot rolling steel ball Raw material testing→Material on storage rack→automatic continued feeding device→furnace heating→enter into rolling ball machine→automatic isothermal transfer→quenching system→steel ball heating preservation device→finished steel ball testing→package→transport to warehouse 2)Automatic production line of hot forging steel ball Raw material testing→Material on storage rack→furnace heating→hot cutting→preforging→enter into rolling ball machine →automatic isothermal system transport→quenching system→steel ball heating preservation device→finished steel ball testing→package→transport towarehouse 3)Traditional production line of forged steel ball Raw material testing→Cutting raw material→furnace heating→forging→automatic isothermal system→quenching system→steel ball heating preservation device→finished steel ball testing→package→transport to warehouse |
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