Duplex Gears for agricultural machinery are composite gears that integrate the first and second transmission gears (or worm/helical gears) on the same axis and share a common drive shaft. They can simultaneously output two independent or coordinated power/hydraulic circuits in equipment such as tractors, harvesters, and seeders. They feature compact structure, vibration reduction, zero backlash adjustment, and maintenance-free operation, and are specifically designed to cope with the harsh working conditions of high dust, high load, and low lubrication in farmland.

Duplex Gears, after Adopting ADI-Cast, Experience Comprehensive Performance Improvements in the Following Aspects: 

1. Higher Strength and Fatigue Life

ADI's tensile strength can reach over 900 MPa, and its yield strength even exceeds that of many forged steels; its bending fatigue limit is significantly improved, greatly extending gear life in high-efficiency transmission systems such as new energy vehicles. 

2. Excellent Wear Resistance and Contact Fatigue Performance

Utilizing the "stress-induced retained austenite → martensite" transformation mechanism, a self-reinforcing hybrid layer forms on the tooth surface, exhibiting superior resistance to scratches and pitting compared to ordinary ductile iron and carbon steel, making it suitable for high-load, low-lubrication conditions. 

3. Vibration and Noise Reduction

The graphite spheres + austenitic matrix allow ADI's damping decay rate to be approximately 40% faster than steel, reducing gear meshing noise by 3-6 dB, making it ideal for applications with high NVH requirements. 

4. Lightweight

With a density of approximately 7.2 g/cm³, it is 8-10% lighter than steel (7.8 g/cm³), allowing for a smaller module/tooth width while maintaining the same strength, further reducing overall assembly weight. 

5. Cost and Manufacturing Flexibility: Near-net-shape casting combined with isothermal hardening reduces machining by 30-50% compared to forged steel; batch costs are typically 20-40% lower, and complex tooth profiles and internal weight-reducing structures are possible. 

6. Better Low-Temperature Toughness

The austenitic matrix allows ADI to maintain high impact energy even at -40°C, making it suitable for cold regions or outdoor equipment; ordinary ductile iron or gray iron is prone to brittle fracture at low temperatures. 

In summary, Duplex Gears' adoption of ADI-Cast achieves a better balance between strength, wear resistance, vibration reduction, weight, and cost, making it particularly suitable for transmission requirements requiring high power density, low noise, and long service life.

ADI 1200-4 Material Properties: