Basic Knowledge of Gear Transmission

Automotive gears are subjected to extreme pressure during the transmission of power and torque, making the choice of material crucial.

Commonly used steel materials for automotive gears mainly include alloy steel, carbon steel, and stainless steel.

Alloy steel is the most common material for automotive gears, especially low-alloy steels such as 16MnCr5 and 20CrMnTi, which have good comprehensive properties and can provide excellent hardness, toughness, and wear resistance. The addition of alloying elements such as chromium, nickel, and molybdenum enhances the strength and corrosion resistance of the steel, effectively extending the service life of the gears.

Alloy steel is also suitable for carburizing treatment, which can improve the wear resistance and fatigue resistance of the gears after surface hardening.

Carbon steel, such as C45 steel, is used in some low-load, low-speed gear transmission systems and has good processing performance, but its strength and wear resistance are relatively poor.

In some special applications, such as environments requiring high corrosion resistance, stainless steel gears are also used, but their strength and hardness are generally lower.