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CPM 10V |
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| Powder
Metal |
CPM 10V powder metal tool steel, a versatile
air-hardening tool and die steel, |
| Tool
Steel |
which
provides extremely high wear resistance in combination with relatively high
impact |
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toughness. A very large volume of hard vanadium carbides provides the high
wear resistance. |
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The
good impact toughness is the result of the fine grain size, small carbides
and superior |
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cleanliness of the powder metallurgy
(PM) microstructure. CPM 10V
offers substantially |
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better wear resistance than the
high-carbon, high-chromium die steels such as D2 and D7. |
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| Typical
Chemistry |
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Carbon |
2.45 |
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Chromium |
5.25 |
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Manganese |
0.50 |
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Vanadium |
9.80 |
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Silicon |
0.90 |
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Molybdenum |
1.35 |
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| Applications |
CPM 10V is suitable for use in
cold work tooling applications requiring maximum |
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wear resistance such as thread roll
dies, punches, blanking dies, shears, nozzles, screw tips, |
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barrel liners and powder compaction
tooling. |
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| Annealing |
Annealing
must be performed after hot working and before rehardening. Heat at a rate not |
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exceeding
400 F per hour to 1600-1650 F, and hold at temperature for 1 hour per inch of
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maximum thickness; 2 hours
minimum. Then cool slowly with the
furnace at a rate not |
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exceeding
50 F per hour to 1000 F. Continue
cooling to ambient temperature in the furnace or in |
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air. |
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| Heat
Treating |
Preheat
to 1500/1550 F, equalize. A second
reheat at 1850/1900 F is recommended for |
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vacuum hardening. |
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Heat rapidly to the high heat from
the preheat. |
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For optimum wear
resistance: |
Soak 5 to 15 minutes. |
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Furnace or Salt Bath: |
2150 F |
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For balance of wear &
toughness: |
Soak 15 to 30 minutes. |
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Furnace or Salt Bath: |
2050 F |
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For maximum toughness and |
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minimum distortion: |
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Soak for 30 to 60 minutes. |
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Furnace: |
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1975 F |
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Salt Bath: |
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1950 F |
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Quenching: |
Pressurized gas, warm oil, or
salt. Sections less than 3"
thick may be air cooled |
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to maximum hardness. Sections 3" thick or more must be
quenched at a faster rate, using one |
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of the methods below, to
obtain maximum hardness. |
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For pressurized gas, the
furnace should have a minimum quench pressure of 4 bars. The quench |
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rate below 1000 F is
critical to obtain the desired properties. |
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For oil, quench until black, about
900 F, then cool in still air to 150/125 F. |
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For salt maintained at 1000/1100 F
equalize in the salt, then cool in still air to 150/125 F. |
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| Tempering |
Temper
immediately after quenching. Typical
temperature range is 1000/1100 F. Do
not |
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temper below 1000 F. Hold at temperature for 2 hours then air
cool to ambient temperature. |
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Double
tempering is required. Triple
tempering is required when austenitized at 2100 F or |
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higher. |
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Note: |
See
your Gateway Metals representative to obtain specific heat treatment |
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information
to obtain certain hardness readings for your specific application. The data |
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presented herein are typical values,
and do not warrant suitability for any specific application or |
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use of this material. Normal variations in the chemical
composition, the size of the product, and |
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heat treatment parameters may result
in different values for the various physical and mechanical |
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properties. |
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