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Austempered Ductile Iron Mill Liner – High Hardness, High Toughness, 2-3x Longer Life than High Manganese Steel
Product Description
Ningguo Huafeng Wear-Resistant Material Co., Ltd. supplies austempered ductile iron (ADI) mill liners featuring ausferrite microstructure achieved through specialized austempering heat treatment, delivering both high strength and high toughness. The liner adopts a composite structure design: low carbon steel base layer ensures toughness and reliable installation, while the ADI wear layer with integral trapezoidal lift bars improves grinding efficiency[citation:2].
Our proprietary ADI mill liner composition (patented technology) includes by weight percentage: C 3.0%-4.2%, Si 2.4%-2.9%, Mn 1.1%-1.4%, Cr 0.1%-0.4%, Mo 0.3%-0.8%, Ni 0.04%-0.08%[citation:3]. Through precise alloy design and austempering heat treatment, the ausferrite + spheroidal graphite microstructure delivers excellent wear resistance and impact toughness.
Key Technical Parameters
- Material: Austempered Ductile Iron (ADI)
- C Content: 3.0% – 4.2%
- Si Content: 2.4% – 2.9%
- Mn Content: 1.1% – 1.4%
- Cr Content: 0.1% – 0.4%
- Mo Content: 0.3% – 0.8%
- Microstructure: Ausferrite + Spheroidal Graphite
- Heat Treatment: Austempering
- Matrix Hardness: HRC 45-55 (adjustable)
- Impact Toughness: ≥100 J/cm²
- Tensile Strength: ≥1200 MPa
Product Advantages
Product Advantages
| Feature | Benefit |
|---|---|
| Ausferrite microstructure | Perfect combination of high strength and high toughness – no cracking under impact |
| Composite structure design | Low carbon steel base for reliable installation; ADI wear layer for excellent wear resistance |
| Integral trapezoidal lift bars | Improved grinding efficiency, reduced energy consumption |
| Austempering heat treatment | Uniform microstructure, consistent performance |
| 2-3x longer life than high manganese steel | Significantly reduced replacement frequency and downtime |
| Custom design available | Tailored per customer mill drawings |
Ideal Applications
- Ball mills and SAG mills in mining
- Cement mills
- Coal mills in thermal power plants
- Other high-impact, high-wear grinding applications
Quality Assurance
Huafeng holds core patented technology for ADI mill liners[citation:2][citation:3]. Full process control from composition design, casting to austempering heat treatment. Every batch is tested with spectrometer for chemical composition, hardness tester for hardness, impact tester for toughness, and metallographic microscope for microstructure. The company is ISO9001, ISO14001 and ISO45001 certified.
Contact us – provide your mill drawings and operating conditions. Our technical team will customize the optimal liner solution for your application.
Custom design and trial orders available – we support customized liner design based on mill parameters and small batch trial verification.
Send Inquiry to This Supplier
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