Daido's Dream Series
DRM3
Cold Forging Die Steel
High hard and tough high speed tool steel with excellent hardenability
Features
Conventional grade MH88 has
been improved to DRM3. High hardness and tough DRM3 with
excellent hardenability is suitable for high precision cold
working tools.
- Applicable with the
maximum hardness 66HRC
- Fine carbides contribute
higher toughness and fatigue strength than those of MH51
equivalent to SKH51
- Greater hardenability
results in high performance even in large dies and gas
quenching in vacuum furnace.
- Double melting realizes
clean and homogeneous steel with less non-metallic
inclusions
Applications
- Cold forging dies and
punches
- Cold work roll, emboss
roll
- Tools quenched by gas in
vacuum furnace
Heat
treatment
| DRM3 |
Harden
1120C (2048F) |
Draws
(minimum of 2) |
Maximum
toughness |
620C
(1148F) HRC62 |
| Recommend
a minimum 6 barr quench |
Good
toughness & wear |
590C
(1094F) HRC64 |
|
|
|
Maximum
wear |
550C
(1022F) HRC66 |
Re-forging
Temperature |
Heat
treatment conditions (ºC) |
Hardness |
| Annealing |
Quenching |
Tempering |
Annealed |
Hardening/Tempering |
| Requested
to inquire |
800~880
Slow cooling |
1100~1140
OQ, GC, Salt bath |
550~620
AC, ≥ twice |
≤235HB |
62~66HRC |
OQ: Oil quenching, GC: Gas
quenching in vacuum furnace, AC: Air cooling
Microstructure
(As annealed)
Finely distributed coarse carbides.
|
|
