Overview
Flame hardening is a
rapid, economical method for selectively hardening specific areas on the
surface of a part. This process is applied only to selected metal surfaces
of carbon and alloy steels, cast and ductile irons, and certain stainless
steels followed by an appropriate quenching method.
The benefit
of selective hardening of a metal surface is better wear of a part and longer
life of the machine, along with minimal distortion.
Through
our combined years of experience, technical expertise, and equipment, Chicago
Flame provides the most effective and economical utilization of the surface
hardening process.
To maximize
your savings and results, we suggest that you contact our technical staff
and discuss with us the best procedures, or design the right equipment,
to achieve the necessary results that your require for your product.
- Flame
hardening saves money by hardening only selective areas
- Flame
hardening achieves high hardness for increased life
- Less
distortion than comparable methods of heat treating
- Less
machining and grinding associated with other methods of heat treating
- Reduced
processing time
- Substituting
of carbon steels for costly alloy steels
- Flame
hardening provides more efficient productivity through increased wear
resistance, leading to reduced down time
Our
Methods of Flame Hardening
Chicago
Flame utilizes three main methods of the flame hardening process :
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Progressive
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Spinning
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Combination
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In the progressive
method of flame hardening, the surface is scanned, rapidly heated
and immediately quenched at a uniform speed. This speed generally
depends upon the desired depth of hardness.
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In the spin
hardening method of flame hardening, a part is surrounded by
flame ejectors and heated while being spun rapidly. When it
reaches proper quenching temperature, it is dropped into, or
it is sprayed with an appropriate quenching solution.
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In the combination
method of flame hardening, as the name applies, combines the
other two techniques to provide uniform heating and quenching
of a rotating part.
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| Many
applications can be found for flame hardening. Various shapes,
curved or straight, varying lengths, widths, and thickness,
can be flame hardened in selective areas that are subject to
excessive wear. The flame hardening process can be the best
and most economical way to extend the life of and provide a
better wear surface for the part. Here are a few examples of
flame hardening applications. |
|
Typical Progressive Method Applications
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Bushings
Cams
Capstans
Cast bed ways
Crane drums
Dies
Gears
Housing & feed screws
Lagging drums |
Liners
Machine ways
Pallets
Punches
Rails
Rings
Sheaves
Sprockets
Tracks |
|
|
Typical
Spinning Method Applications
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Gears
Rollers
Shafts |
Wheels
--
Single flange wheels
Double flange wheels |
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Typical
Combination Method Applications
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Arbors
Rams
Rolls |
Shafts
Selective areas on rolls
Trunions |
|
Rolls
and Shafts
|
|
| Flame
hardening is the best, and sometimes the only way to heat treat
large and outsized rolls -- less distortion, higher surface
hardness, combined with ductility and core strength. |
|
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Flame
hardened roll section
|
|
|
| Flame
hardening of rolls provides a better wear surface, uniform case,
maximum hardness, while leaving a both a tough and ductile core. |
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