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Commonly used materials and heat treatment methods for gear parts(1)

May. 22, 2024

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One. Basic requirements for gear materials

1. The tooth surface must be hard and the tooth core must be tough.

2. Easy to process and heat treat

3. Sufficient bending under alternating loads and impact loads

Two. Commonly used materials and heat treatment methods

No.

Gear type

Steel

Heat treatment

 

1

Automotive transmission and differential gears

 

20CrMo20CrMnTi

Carburizing

40Cr

Carbonitriding

 

 

 

2

Automobile drive axle driving and driven cylindrical and bevel gears, differential planetary and side gears

 

20CrM020CrMnTi

20CrMnMo20SiMnVB

Carburizing

3

 

Car starter motor gear

 

20Cr20CrMo

20CrMnTi

Carburizing

 

4

Automobile crankshaft timing gear

 

404540Cr

Hardening and high temperature tempering

5

Automobile crankshaft timing gear

 

20

 

Carbonitriding

 

 

6

Tractor transmission gears, cylindrical gears and shaft gears in power transmission devices

 

20Cr20CrMo20CrMnTi20CrMnMo,

20SiMnNB

 

 

Carburizing

7

Tractor crankshaft timing gear, camshaft gear, hydraulic pump drive gear

 

45

Hardening and high temperature tempering

8

Automobile and tractor hydraulic pump gears

 

40,45

Hardening and high temperature tempering

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