Commonly used materials and heat treatment methods for gear parts（1）
May. 22, 2024
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 |
20CrM0，20CrMnTi， 20CrMnMo，20SiMnVB | Carburizing |
3 |
Car starter motor gear |
20Cr，20CrMo， 20CrMnTi | Carburizing |
4 | Automobile crankshaft timing gear |
40，45，40Cr | 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 |
20Cr，20CrMo，20CrMnTi，20CrMnMo, 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 |
