TECHNICAL INFORMATION
Very basically, the process works by the load components absorbing some of the nitrogen present in the furnace atmosphere (at the process operating temperature).
Virtually all steels nitride to some extent but to provide a useful increase in surface hardness certain amounts and types of alloying elements need to be present, generally Chromium, Molybdenum and in some cases Aluminium, Vanadium and Tungsten.
|
CYCLE TIME |
MATERIAL
|
|||
|
BS
970: |
BS
970:
722 M24 (EN40B) |
BS
970:
905 M39 (EN41) |
Tool
Steel
H13 (5% Chrome) |
|
|
12
|
.006/.010"
(.15/.25mm) |
.005/.006"
(.125/.15mm)
|
.006/.008"
(.15/.2mm) |
c.004"
(c.0.1mm)
|
|
24
|
.010/.014"
(.25/.35mm)
|
.008/.010"
(.2/.25mm)
|
.010/.012"
(.25/.3mm)
|
c.0.006"
(c.0.15mm)
|
|
45
|
.018/.024"
(.45/.6mm)
|
.012/.014"
(.3/.35mm)
|
.016/.018"
(.4/.45mm)
|
c.0.010"
(c.0.25mm)
|
|
70
|
.024/.028"
(.6/.7mm)
|
.014/.016"
(.35/.4mm)
|
.020/.022"
(.5/.55mm)
|
c.012"
(c.0.3mm)
|
|
90
|
.028/.036"
(.7/.9mm)
|
.016/.020"
(.4/.5mm)
|
.022/.026"
(.55/.65mm)
|
c.016"
(c.0.4mm)
|
|
VICKERS
Surface Hardness ROCKWELL "C" |
550 - 650 52 - 58 |
750 - 950 62 - 68 |
950 - 1150 68 - 71 |
1000 - 1250 69 - 72 |
Many other steels can be nitride
hardened, for example:
D2, P20, D3, L6 and A2 tool steels, also alloy steels such as BS970: 817M40
(EN24)
For advice please contact us.
We offer a full range of furnace cycle times on a regular, scheduled basis:
12 hour cycles -
24 hour cycles -
45 hour cycles -
90 hour cycles -
5 loads per week (including 1 over weekends)
4 loads per week (including 1 over weekends)
2 loads per week:
- on every Friday - ready Monday
- on every Tuesday - ready Friday
At least 1 load per week:
- on Thursday - ready Tuesday
Specialists
EXCLUSIVELY in the Nitride Hardening Process
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