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Induction
FAQ's
From Radyne - the Innovators in Induction Heating
What is induction
heating?
- Induction heating is a method by which electrically
conducting materials (generally metals), are heated by a non-contact
method in an alternating magnetic field.
What are the most
common applications for induction heating?
- Heat treatment of metals - induction hardening,
induction tempering, and induction annealing.
- Induction heating prior to deformation - forging,
swaging, upsetting, bending, and piercing.
- Induction brazing and induction soldering - brazing
of steel, brass,
and copper to each other in combination and aluminum to aluminum.
- Induction for shrink fitting - In any manufacturing
process, for
example, shrinkfitting of motor rotors to shafts, shrink fitting of
shell casings for compressors.
- Induction heating prior to coating - Of dissimilar
metals, prior to insulation, and curing, such as paint.
- Induction melting - Of all types
and amounts of metals and precious metals.
- Other applications include crystal growing, cap
sealing,
sintering, carbon vapor deposition, levitation, exitaxial deposition,
and plasma generation.
Basically how does
induction heating work?
- Induction heating occurs when an electrically
conducting object (generally metal) is placed in a varying electric
magnetic field. Induction heating occurs due to the magnetic quality
and resistivity of the material. The magnetic qualities are only
present in magnetic steel. The varying electric magnetic field induces
a current inside the component being heated in a similar way to that of
a transformer.
What makes
induction heating different from other methods of heating such as
resistance or conduction?
- Induction heating is a non-contact method. The heat
is generated only in the part, not in the surrounding area except by
radiation. The location of the heating can be defined to a specified
area on the metal component and achieves accurate and consistent
results. As heating occurs in the object itself, induction heating is
considered more efficient than alternative methods.
What does an
induction heating system comprise of?
- An induction heating system comprises a basic
induction power source which provides the required power output at the
required power frequency, complete with matching components, an
induction coil assembly, a method of material handling, and some method
of water cooling. Most induction heating systems are water cooled with
the exception of small, low powered units.
- The methods of material handling and the induction
coil arrangement are dependant entirely upon the application. The
choice of induction power source is related to the application
requirements and to production rate.
If I have an
application that I feel can utilize induction heating who should I
contact?
- Contact us email at sales@radyne.com
or filling in this form. Radyne also has checklists
for specific applications which can be completed and e-mailed or faxed
(414-481-8303) to us so that we can provide a fast response.
Where can I find
other references regarding induction heating?
- Other references include Basics of Induction Heating
by Chester Tudbury (paperback) or
- Handbook of Induction Heating by Valery Rudnev, Don
Loveless, Raymond Cook and Micah Black (800 pages hardcover) - contact
Radyne sales@radyne.com
for information on how to purchase a copy.
- Elements of Induction Heating by Zinn and Semiatin
- Induction Heat Treatment of Steel by Semiatin and
Stutz
- Induction Heating Handbook by Davis and Simpson
- Induction Heating for Forging - FIA Plant Engineering
Committee. Contact the Forging Industry Association at www.forging.org
There are many other references within organizations such as the SME
(Society of Manufacturing Engineers), ASM (American Society of Metals),
FIA (Forging Industry Association), and WAI (Wire Association
International) to which many papers have been written on induction
heating. Significant contributions have been given by Radyne.
If I have other
questions regarding induction heating who should I contact?
- Please contact Radyne by email at sales@radyne.com.
You can be assured of a fast response.
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