VARIOUS TYPES OF NITRIDING
PROCESS
|
There
are three types of Nitriding : Gas Nitriding, which uses atmospheric gases for
the permeation of nitrogen from the surface ; Gas
Nitro-Carburizing ( as well known : Salt Bath Nitriding ), which
allows the simultaneous permeation of both nitrogen and oxygen ; and Gas
Sulfur Nitriding, which uses atmospheric gases with NM gas with the permeation
of nitrogen from the surface.
Nitriding
in all of its forms creates a hard, abrasion-resistant surface, while the
interior increases in toughness. In addition, the material requires resistance
to heat, corrosion, and distortion, and requires no washing after treatment.
|
|
Advantages
1)
High Surface Hardness ( refer to Hardness Table )
2)
Increase Wear Resistance
3)
Increase Fatigue Resistance
4)
Improve Corrosion Resistance
5)
Thermal Refining Steel, High Speed Steel & Hot Work Steel
are
preserved core hardness during Nitriding operating temperature 500oC
~ 600oC
|
|
|
Before
|
After
|
|
|
|
|
Hardness Table
|
|
| |
Material
( JIS / AISI ,SAE, ASTM ) |
Surface
Hardness (HV) |
|
| Rolled Steel Sheet |
SPCC /
A109(ASTM) |
450~650 |
| CarbonSteel |
S45C / 1045 |
550~800 |
| SK5 / 1086 |
550~800 |
| Structural
Steel |
SCM415 / SAE4115 |
650~900 |
| SCM435 / SAE4135 |
650~900 |
| Nitriding Steel |
SACM645 / E71400
(AMS6470) |
900~1200 |
| Spring Steel |
SUP10 / SAE6150 |
650~750 |
| Tool Steel |
SKD61 / H13 |
1000~1200 |
| Stainless
Steel |
SUS304 / AISI304 |
1000~1300 |
| SUS420J2
/ AISI420 |
1000~1300 |
|
