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The main purpose of heat treatment for gearbox gears is to improve their performance and extend their service life by changing the internal structure and mechanical properties of the gear material. Specifically, the main purposes of heat treatment include the following aspects:

1. Improve hardness

Surface hardness: By quenching and carburizing/nitriding treatment, the hardness of the gear surface is significantly improved, enhancing its wear resistance and resisting tooth surface wear.

Core hardness: Appropriate heat treatment process can maintain a certain toughness of the gear core, preventing the gear from breaking when subjected to impact.

2. Enhance wear resistance

Surface wear-resistant layer: carburizing and nitriding treatment form a hard layer on the surface of the gear, significantly improving the wear resistance of the surface and extending the service life of the gear.

Uniform hardness distribution: Through a reasonable heat treatment process, the hardness distribution on the surface and core of the gear is uniform, avoiding rapid local wear.

3. Improve resilience

Internal stress elimination: Tempering treatment can eliminate the internal stress generated during quenching, improve the toughness of gears, and prevent brittle fracture.

Core toughness maintenance: Appropriate heat treatment processes can maintain high toughness of the gear core and resist impact loads.

4. Improve corrosion resistance

Surface protective layer: Nitriding treatment forms a dense nitride layer on the surface of the gear, improving its corrosion resistance and suitable for use in harsh environments.

5. Enhance fatigue strength

Internal stress optimization: Heat treatment can optimize the internal stress distribution of gears, improve their fatigue strength, and extend their service life.

Surface quality improvement: By heat treatment and post-treatment (such as shot blasting), the quality of the gear surface is improved, reducing the occurrence of fatigue cracks.

6. Ensure dimensional stability

Stress balance: Through tempering treatment, the internal stress of the gear is balanced to ensure dimensional stability and reduce deformation during use.

7. Adapt to specific application requirements

Customized processing: Based on the specific application environment and performance requirements of the gear, different heat treatment processes are used to customize and enhance its specific performance, such as high temperature performance, low temperature performance, etc.

The main purpose of heat treatment for gearbox gears is to improve the hardness, wear resistance, toughness, corrosion resistance, fatigue strength, and dimensional stability of the gears by changing the internal structure and properties of the materials, so that they can better adapt to the working environment and performance requirements of the gearbox, thereby extending the service life of the gears and ensuring the stable operation of the gearbox.