4 major requirements for selecting materials for small modulus gears and application of common material properties

The 4 major requirements for selecting materials for small modulus gears and the application descriptions of common material properties are as follows, for reference.

4 major requirements for selecting materials for small modulus gears:

1. According to the working conditions of the product, appropriate considerationgearThe strength and hardness of the tooth surface.

2. Good material processing performance.

3. The material has good stability and is not easily corroded by chemical substances.

4. Easy to get lower surface roughness.

Material selection requirements of small module gears for different application requirements:

1. The application of bakelite, nylon, and engineering plastics for small modulus gears is beneficial to reduce transmission noise, improve vibration resistance, and improve processing performance. Non-metallic materials have been widely used.

2. Worm drive with large tooth surface sliding, cross-axis helical gear drive, steel for driving wheel, yellow lanthanum and bronze for driven wheel.

3. Free-cutting steel is used for the gear shaft of the timing instrument, and copper is used for the gear piece of the timing instrument.

4. High-strength, high-abrasive gears are made of alloy steel, and corrosion-resistant products are made of stainless steel.

5. General purposeCylindrical gear, Bevel gears are made of carbon steel or high-quality carbon steel.

6. Aluminum alloy is commonly used for instrument gears.

Common material names and performance applications of small modulus gears:

1. Free-cutting steel:

Grades: Y30, Y35, Y40Mn.

Performance: Good cutting performance, can improve the wear resistance of tooth surface after heat treatment.

Application: Used to make gear shafts and general gears for timing instruments.

2. High-quality carbon structural steel:

Grades: 15, 20, 30.

Performance: Good cutting performance, 15 and 20 steel should be carburized.

Application: Used for products with peripheral speed less than 3m/s.

3. Carbon tool steel:

Grades: T7A, T8A, T10A.

Performance: Good wear resistance and high strength.

Application: For productionGear shaft, Worm and demanding products.

4. Stainless steel:

牌号：2Cr13Ni2、2Cr13、3Cr13、4Cr13、9Cr18、1Cr18Ni9Ti。

Performance: Poor cutting performance, good toughness, acid resistance and corrosion protection.

Application: For anti-corrosion and anti-rust gears.

5. Alloy tool steel:

牌号：15Cr、20Cr、40Cr、18CrMnTi、38CrMoAl、40CrNiMoA。

Performance: After carburizing and quenching of 15Cr and 20Cr, a hard surface and tough center structure can be obtained, with good wear resistance and impact resistance; after nitriding, 38CrMoAl has higher surface hardness, less deformation, wear resistance and strength than carbon tools The steel is good.

Application: Used to manufacture demanding worms; 18CrMnTi and other gears and worms with high load and high wear resistance.