What materials can improve the base carrying capacity of the NBD710-35.5 planetary reducer

Material selection for improving the bearing capacity of the NBD710-35.5 planetary reducer base

1. Base material optimization

• ‌Ductile iron (QT500-7/QT600-3) ‌:
  ‌Ductile iron has high strength (tentic strength 500-700MPa) and excellent shock absorption performance (shock absorption coefficient ≥0.15), which can effectively reduce the impact of gear meshing vibration on the base, and is suitable for heavy-load conditions.

• Advantages: Good casting performance, cost 30%-50% lower than cast steel, and can further improve rigidity through reinforcement design.

• ‌Casted steel (such as ZG270-500) ‌:
  Suitable for extreme heavy load or impact conditions, with tensile strength ≥500MPa, but attention should be paid to stress relief treatment after welding or machining.

2. Reinforcement of key connector materials

• ‌Anchor bolts and connection bolts‌ :
  High-strength alloy steel (such as 40Cr or 42CrMo) is used. After tempering and tempering (quenching + high-temperature tempering), the tensile strength can reach 800-1100MPa, which significantly improves the connection reliability between the base and the reducer.

3. Surface treatment and protection

• ‌Place surface hardening‌ :
  Shot peening of ductile iron bases or coated with wear-resistant coatings (such as epoxy resins), which can improve surface hardness and corrosion resistance and extend service life‌.

4. Auxiliary structure design

• Reinforcement ribs and support structures :
  When designing the base, reinforcement ribs are added (thickness ≥ 1.5 times the thickness of the base wall) and adopt a modular design (such as split bases) to disperse stress concentration.

5. Lubrication and sealing materials

• ‌High-performance grease‌ :
  Use lithium-based grease (such as No. 2 lithium-based grease) containing MoS₂ or extreme pressure additives to reduce friction and wear between the base and the reducer contact surface‌.

6. Dynamic load adaptability optimization

• ‌Impact Toughness Material‌ :
  If the base needs to withstand frequent start-stop or impact loads (such as mining equipment), 42CrMo alloy steel can be used, and its impact toughness (αk≥40J) is better than ordinary carbon steel‌.

Summarize

Through material upgrades (ductile iron/cast steel), key parts reinforcement (40Cr/42CrMo bolts), surface treatment and structural optimization, the bearing capacity and impact resistance of the NBD710-35.5 reducer base can be significantly improved‌