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Nitrocarb-Plus is a special, ready to use compound
that requires no preheating. It gives the desired depth of case hardness in the shortest possible time without the need for
special equipment. No atmosphere is required. Any furnace may be used. It can be utilized for shallow cases as well as
for deep case hardening.
Nitrocarb-Plus...
1. Can be used for all steels and alloys suitable for case hardening.
2.
Can be used where speed-up and quality is needed on non-mass production jobs.
3. Is used where selective case hardening
is required.
4. Is used in tool room maintenance work.
5. Works with special tools in heat treating where dimensions
are critical.
CASE HARDENING APPLICATION:
Clean the piece thoroughly. Then cover it with a layer of Nitrocarb-Plus
approximately 1/2" thick, being sure to press the paste down tightly to eliminate any air pockets. If the area to be covered
is large, it may be advisable to tie the paste to the part with wire or wire mesh.
Then, place the piece in the furnace
and heat for the required time. Be sure to hold the work at the proper temperature until the desired case depth has been
reached. (This is determined by the type of steel being treated).
Let the piece cool to room temperature, then brush
or knock off the paste and reheat to quenching temperature, and quench.
NOTE: If no furnace is available and a torch
or other means of heating is used, keep the temperature as uniform as possible. To prevent the flame from coming into direct
contact with the area of the metal protected by Nitrocarb-Plus, wrap it loosely in a piece of steel foil or place it in a
piece of tubing.
After the treatment, a dull gray surface may be found. Do not remove this surface. It should be
left on for nitriding, as it provides the greatest resistance to pick-up.
NITRIDING APPLICATION:
After grinding
and finishing the work, clean it thoroughly and cover it with a layer of about 1/2" of Nitrocarb-Plus, pressing it on tightly.
Heat the work very slowly to 1025 F. - 1050 F. (for high spped steel the temperature should not exceed the tempering temperature
of the steel used).
Keep the work at temperature for 30 minutes to 2 hours according to size and type of object. Remove
it from the furnace; remove Nitrocarb-Plus and let it cool off in the air, (Nitrocarb-Plus may be removed also after the work
has cooled off).
If a number of tools, drills, etc. are to be nitrided only at the ends, it may be easier to put the
ends of the tools to be hardened into a layer of Nitrocarb-Plus keeping a distance of about 1/2" between each other.
Nitriding
will increase the wear resistance and fatigue life of a tool or other object. The resistance to scoring, sizing, and similar
troubles will be equally improved. Yet, when nitriding a tool, it is necessary to consider the resulting surface brittleness.
A punch or a die made of high speed steel and subjected to extremely heavy wear (but not to impact) will give excellent results
after having been nitrided with Nitrocarb-Plus for 2 hours at 1025 F. - 1050 F.
However, a case depth of 0.002" obtained
after 2 hours at 1050 F. would make many other tools too brittle. For instance, drills of a diameter of 1/2" or more will
require about half the time. Drills of smaller diameter or reamers or cutters should be nitrided for even a shorter time.
Nitrocarb-Plus
was developed to meet the demands of industry for increased production. Nitrocarb-Plus is easily applied, clings tightly
to the part and provides a deeper, tougher hardness.
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