Mar 24, 2020 Viewed: 46 Tag: Gear  

Common gear materials and their mechanical properties

Common gear materials and their mechanical properties


Gear teeth must transmit torque and bear loads such as bending and impact during transmission. After a period of use, the gear teeth will also experience tooth surface wear, tooth surface pitting, surface occlusion, and plastic deformation of the tooth surface, which will cause loss of accuracy, and produce vibration and noise failures. Depending on the working conditions of the gear, the damage forms of the gear teeth are also different. When selecting gear materials, in addition to the gear working conditions, factors such as the gear's structural shape, production quantity, manufacturing cost, and material supply should be considered. Generally meet the following basic requirements:


1. The surface layer of gear teeth must have sufficient hardness and wear resistance.


2. For gears subjected to alternating and shock loads,

The substrate must have sufficient flexural strength and toughness.


3. Must have good workability,

That is to be easy to cut and heat treatment performance is good.

Common tooth profile processing methods

There are two types of gear tooth processing methods: chip processing and cutting processing.

Chip-free processing methods include: hot rolling, cold extrusion, die forging, precision casting and powder metallurgy.

Cutting methods can be divided into two methods: forming method and forming method.





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