Inductoheat - An Inductotherm Group Company

An inaccurate assessment of the electrical properties of heated alloys can dramatically reduce heating efficiency, which, in turn, could lead to unexpected excessive copper losses, greater magnetic forces experienced by the coil, and ad a result, potential shortening of coil life. In some cases, eddy current cancellation can be so pronounced that it will be [...]

It has been shown that a comparison of the properties of carbon steel parts processed with both types of tempering regardless of the identical hardness (48HRC) the tempered carbon steel part (0.8% C) subjected to “the high temperature/short time” tempering (30sec at 465ºC) showed three times higher brittle strength compared to a part tempered for [...]

Gear performance characteristics (including load condition and operating environment) dictate the required surface hardness, core hardness, hardness profile, residual stress distribution, grade of steel, and the prior microstructure of the steel 1.  In contrast to carburizing and nitriding, induction hardening does not require heating the whole gear. With induction, heating can be localized to only [...]

Magnetic flux concentrators (also called flux intensifiers, diverters, or controllers) are made from high-permeability, low-power-loss materials. They are routinely used in induction heat treatment applications in a manner similiar to that of magnetic cores in power transformers. There are three traditional functions of flux concentrators in induction hardening; (a) providing a selective heating of certain [...]

In progressive induction heating applications (for example, in-line inductors), it is easier to predict the expected temperature distribution and to obtain the required temperature profile in the bar compared to the case of the bar end heating application. This is because each part of the bar in the progressive induction heater experiences the same magnetic [...]

Whenever someone is talking about induction heating, reference is often made to the phenomenon of skin effect. In most publications devoted to induction heating distributions of current density and power density (heat source distributions) along the workpiece thickness/radius are simplified, and described as exponentially decreasing from the surface into the workpiece. However, in some applications, [...]

The temperature at which a ferromagnetic body becomes nonmagnetic is called the Curie temperature (Curie point).Depending upon the heat intensity (Cº/s or Fº/s) there can be some shifting of the Curie temperature. Chemical composition is another factor that has a marked effect on it. Even among the plain carbon steels, the Curie temperature might be [...]

When the currents flow in opposite directions, a strong magnetic field forms in the area between the bus bars. This occurs because in this area the magnetic field lines produced by each bus bar have the same direction. Therefore, the resulting magnetic field between the bus bars will be strong. However, because the currents are [...]

Compared with brazing and soldering, adhesive bonding is much more versatile because the components to be joined don not have to be metals. Plastics, ceramics, glasses and other nonmetallic materials can also be bonded. The adhesive, which is applied prior to induction heating, is not electrically conductive, so it cannot be heated by induction. Therefore, [...]