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NEW
POWDER METAL M-4
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CHEMICAL ANALYSIS
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HEAT TREATMENT RESPONSE
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Carbon
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1.45
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AsOil quenched from
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Hardness Rc
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Manganese
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0.25
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1900°F(1038°C),
45 min |
60.0 |
| Silicon |
0.25 |
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2000°F(1093°C),
20 min |
63.0 |
| Chromium |
4.50 |
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2100°F(1149°C),
15 min |
65.0 |
| Vanadium |
3.85 |
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2200°F(1204°C),
5 min |
63.5 |
| Tungsten |
5.50 |
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| Molybdenum |
4.50 |
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Powder Metal M4:
Is an extremely versatile, high speed steel providing
a unique combination of high wear resistance with high impact toughness
and tranverse bend strength. A large volume of vanadium carbides provides
the high wear resistance. The high impact toughness and high traverse
bend strength are results of the fine grain size, small carbides and
superior cleanliness of the powder metallurgy (PM) microstructure. TLP
M4 offers improved cutting tool life compared to conventially-wrought
M1, M2, M7 and other lower-alloyed high speed steels. TLP M4 also excels
in cold work tooling applications, where it provides better toughness
and wear resistance than high than high-carbon, high-cronium die steel
such as D2a nd D3.
Relative
Properties:
Physical
Properties:
| Density |
0.286 lb/in3 (7916 kg/m3) |
| Specific Gravity |
7.92 |
| Modulus of Elasticity |
31x102 psi (214 GPa) |
Critical
Temperature:
Acl: 1545°F (840°C)
Hardening:
Preheating: 1500-1550°
F (816-845° C), equalize
A second preheat at 1850-1900°
F (1010-1040° C) is recommended
for vacuum hardening. |
| Austenitizing (High Heat): Heat rapidly from
the preheat. |
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For Cutting Tools: |
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Soak for 5 to 10 minutes |
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Furnace: 2150-2200°
F (1177-1204° C) |
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Salt Bath: 2125-2175°
F (1163-1191° C) |
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For Cold Work Tooling: |
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Soak for 20 to 45 minutes |
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Furnace: 1875-2125°
F (1023-1163° C) |
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Salt Bath: 1850-2100°
F (1010-1149° C) |
| Quenching: Pressurized gas, warm oil aor salt.
For pressurized gas quenching the quench rate to below 1000°
F (538° C) is critical to
obtain the desired properties. |
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For oil, quench until black, about 900°
F (482° C), then cool is
still air to 150-125° F (66-51°
C) |
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For salt maintained at 1000-1100°
F (538-593° C), equalize
in the salt, then cool in stil air to 150-125°
F (66-51° C) |
| Tempering: Temper immediately after
quenching. Typical temperature range is 1000-1100°
F (538-593° C). Do not temper
below 1000° F (538°
C). Hold at temperature for 2 hours then air cool to ambient temperature.
Double tempering is required. Triple tempering is required when
austenitized at 2100° F (1149°
C) or higher. |
© Copyright 1999 Diamond Metals Corporation.
All Rights Reserved.
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