Commonly used materials for gear couplings

1. Alloy Steel

- Grades: 42CrMo, 40CrNiMo, etc.

- Application: high torque, high speed occasions.

2. Stainless steel

- Brands: 304, 316, etc.

- Features: corrosion resistance, high temperature resistance.

- Application: corrosive environments such as chemical industry and food processing.

3. Carbon steel

- Brands: 45 steel, 20CrMnTi, etc.

- Features: low cost and good processability.

- Application: low torque, low speed occasions.

4. Cast iron

- Brands: HT250, QT600, etc.

- Features: low cost, wear resistance, vibration resistance.

- Application: low speed, light load occasions.

5. Bronze

- Brand: ZCuSn10Zn2, ZCuAl10Fe3, etc.

- Features: wear resistance, corrosion resistance, self-lubrication.

- Application: low speed, low load occasions.

Heat treatment process of gear coupling

1. Quenching and tempering treatment

- Process: high temperature tempering after quenching.

- Purpose: improve comprehensive mechanical properties (strength, toughness).

- Application: alloy steel, carbon steel.

2. Surface quenching

- Process: induction quenching or flame quenching.

- Purpose: improve surface hardness and wear resistance.

- Application: gear surface treatment.

3. Carburizing treatment

- Process: surface carburizing followed by quenching.

- Purpose: improve surface hardness and wear resistance, maintain core toughness.

- Application: low carbon steel, alloy steel.

4. Nitriding treatment

- Process: surface nitriding.

- Purpose: Improve surface hardness, wear resistance and corrosion resistance.

- Application: Alloy steel, stainless steel.

5. Annealing

- Process: Slow cooling after heating.

- Purpose: Eliminate internal stress and improve processing performance.

- Application: Cast iron, bronze.

Selection of materials and heat treatment process

- Alloy steel: Tempering + surface quenching or carburizing.

- Stainless steel: Nitriding.

- Carbon steel: Tempering + surface quenching or carburizing.

- Cast iron: Annealing.

- Bronze: Annealing.

Typical applications of gear couplings

- Alloy steel: Heavy industry, power generation equipment.

- Stainless steel: Chemical industry, food processing.

- Carbon steel: General machinery.

- Cast iron: Agricultural machinery.

- Bronze: Ship propulsion system.

Selecting the right material and heat treatment process can significantly improve the performance and life of the gear coupling.