Description of several heat treatments commonly used in gear processing

1. Quenching and tempering:

It is generally used in transmissions that do not have strict requirements on size and accuracy, and the hardness obtained is less than 350HBS (soft tooth surface).

2. Overall (surface) quenching:

Commonly used materials are medium carbon steel and medium carbon alloy steel. The whole (surface) is quenched and then tempered at low temperature.

3. Normalizing:

Normalizing is often used for small batches, single-piece production, and there is no big restriction on the transmission size.

4. Surface nitriding:

Generally used in high-speed, precision, and heavy-duty transmission, the hardness is >350HBS (hard tooth surface).

Carbonitriding: the process time is short, one advantage of carburizing, can replace carburizing and quenching, and the material is the same as carburizing and quenching.

When 2gearWhen the material is the same, different heat treatments are used.

Carburized gears have small deformation and high hardness, and are generally used in gears that are difficult to grind andInternal gear processing.

5. Carburizing and quenching:

Commonly used low-carbon steel and low-carbon alloy steel materials are generally used for heat treatment of gears with relatively large impact loads.