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· Dense Metallurgical Matrix: Defect-free forged martensitic structure with 20% higher bulk and true density compared to ordinary cast grinding balls.
· Low Breakage Rate: Industrial breakage rate stably controlled below 1%, offering a 30% lower fragmentation rate than cast alternatives.
· Consistent Hardness: Ultra-small internal hardness gradient of ≤3 HRC from surface to core.
· Precision Sizing: Diameter tolerance strictly controlled within ±0.2 mm.
· Customizable Alloys: Customized chromium and manganese alloy components available for upgraded anti-corrosion performance in wet grinding circuits.
Feature | Advantage | Buyer Benefit |
High-pressure hot open-die forging process | Eliminates shrinkage cavities, air pores, and non-metallic inclusions to form a uniform dense martensitic matrix. | Prevents abnormal wear and early failure, ensuring durability in high-energy heavy-load milling environments. |
Optimized segmented quenching and low-temperature tempering | Realizes precise whole-piece hardness regulation with an internal hardness gradient of ≤3 HRC from surface to core. | Avoids high hardness brittleness fracture and low hardness rapid abrasive wear, reducing overall operating costs. |
Automated precision forging and finishing machining | Controls the diameter tolerance strictly within ±0.2 mm to ensure uniform ball size. | Forms a stable media motion track, reducing uneven eccentric wear on mill liners and lifter bars by 15%. |
General Parameters
Diameter Range | 10mm to 130mm |
Diameter Tolerance | ±0.2 mm |
True Density | 7.8 g/cm³ |
Industrial Consumption | 0.3 kg/t to 1.5 kg/t ore (depending on application requirements) |
Mechanical Properties & Chemical Composition by Grade
Grade | Hardness (HRC) | Impact Toughness | Chemical Composition (%) |
B3 High-Alloy | 58-63 HRC | 12 J/cm² | C: 0.58-0.66, Si: 1.6-1.9, Mn: 0.65-0.8, Cr: 0.7-0.9, P: ≤0.03, S: ≤0.03 |
B2 High-Alloy | 55-60 HRC | 12 J/cm² | C: 0.7-0.85, Si: 0.17-0.37, Mn: 0.7-1.0, Cr: 0.5-0.6, P: ≤0.035, S: ≤0.035 |
65Mn Alloy | 50-60 HRC | 12 J/cm² | C: 0.62-0.7, Si: 0.17-0.37, Mn: 0.9-1.2, Cr: ≤0.25, P: ≤0.035, S: ≤0.035 |
Designed for heavy-duty grinding and milling operations across various industrial sectors, including:
· Semi-autogenous (SAG) mills, ball mills, and rod mills.
· Gold, copper, and iron ore mineral mining.
· Cement plants (clinker production).
· Metallurgical processing facilities.
· Power stations.
To ensure accurate quoting and production planning, please confirm the following details during your inquiry:
· Maximum Size Confirmation: Standard specifications cover 10mm to 130mm. If larger sizes are required for primary coarse grinding, please specify for technical review.
· Minimum Order Quantity (MOQ): Details can be confirmed based on specific grade and size requirements.
· Packaging Methods: Please indicate your preference (e.g., steel drums, flexible bulk bags).
· Delivery Lead Time: Subject to order volume and current production schedules.
Q: What is the internal hardness gradient of these grinding balls?
A: The forged grinding balls feature an ultra-small internal hardness gradient of ≤3 HRC from the surface to the core, which helps avoid brittleness fracture and rapid abrasive wear.
Q: How does the dimensional tolerance affect mill performance?
A: The diameter tolerance is strictly controlled within ±0.2 mm. This uniform sizing forms a stable media motion track, which can reduce uneven eccentric wear on mill liners and lifter bars by 15%.
Q: What is the expected breakage rate during continuous impact?
A: Thanks to the dense defect-free forged martensitic matrix, the industrial breakage rate is stably controlled below 1%.
