Hardening Surface Treatment Comparison

Processing

Carburization

Nitrogenization

Induction quenching

Time

Moderately long

Long（normally cost 3-9 hours）

Very short

Depth

Moderate

Shallow（normally less than 0.5mm）

Deep

Material

Low carbon steel or alloy steel

Alloy steel( the C content is in 0.2%-0.5%)

Medium carbon steel

Mechanical

Properties

Good hardness, high wear resistance, the best strong contact stress resistance, good fatigue strength and adhesiveness

Good hardness, high wear resistance, strong contact stress resistance, good fatigue strength and the best adhesiveness

Good hardness, high wear resistance, strong contact stress resistance, good fatigue strength and satisfying adhesiveness

Application

The parts require good wear resistance and will bear strong contact stress.

The parts bear certain contact stress or require good wear resistance working under 500 ℃.

The parts require good wear resistance and bear moderate high contact stress.

Features

High temperature, moderately long time, large deformation.

Low temperature, the most long time, the minimum deformation, good corrosion resistance and stable dimension.

Small deformation,high effectiveness,is easy for mass production, save resource.

Examples

20

20Cr

15CrMn

20CrMn

12CrNi3A

18CrNiWA

42CrMo
38CrMoAl
18Cr2Ni4WA

45

42CrMo

34CrNiMo