Induction Heating Archives - Page 3 of 5

March 14th, 2011

Coil Failure pt. 4: Electromagnetic Edge Effect

Non-uniform coil current distribution resulting from various electromagnetic phenomena has a dramatic effect on induction coil life and crack development in the coil copper. This article is one of series […]

March 7th, 2011

Common misassumption in induction hardening

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 […]

February 7th, 2011

Coil Failure: Pt. 5 – Effect of Flux Concentrator on Coil Life

Magnetic flux concentrators (also called flux intensifiers, diverters, or flux controllers) are made from high permeability, low-power-loss materials. They are used in induction heat treating applications in a manner similar […]

January 31st, 2011

How do I select inductors for billet heating?

Induction heating is widely used to heat metals prior to hot forming including forging, upsetting, rolling, extrusion, and other methods. Billets are heated either in cut lengths or continuously and […]

January 17th, 2011

Metallurgical Insights: Pt 6: Stripping phenomenon

Heat-treat practitioners sometimes observe unusual effects in induction hardening, such as a striping phenomenon and a barber-pole effect that are often considered to a mysterious phenomena. In some applications, striping […]

November 18th, 2010

Prevent rust staining from the quenchant pt. 1

Induction does not promote any appreciable corrosion. However, it is well-established that corrosion intensity increases with increasing temperature (regardless of whether the temperature increase is after induction heating or any […]

November 1st, 2010

Joining Components By Induction, pt. 2

Compared with brazing and soldering, adhesive bonding is much more versatile because the components to be joined do not have to be metals. Plastics, ceramics, glasses, and other nonmetallic materials […]

October 21st, 2010

Automotive Induction Heat Treating

Successful vehicle programs use inductoheat induction heating equipment. From bumper to bumper, automotive components require specialized thermal processing. Quality parts emerge from quality ideas and efforts. Inductoheat offers a partnership […]

October 14th, 2010

Coil Failures pt 7: Hardening Inductors

When designing and fabricating long-lasting induction systems it is important to consider the electromagnetic field in the immediate vicinity of the inductor. The use of low-resistivity nonferrous materials (preferably electrically […]

October 7th, 2010

Single Coil Dual Frequency: Gear Hardening pt. 4

The gear is induction preheated to a temperature determined by the process features, typically being 350 to 100°C below the critical temperature Ac1. The pre- heat temperature depends on the type […]

August 24th, 2010

Keeping Your Temper With Flux Concentrators

Induction hardening steel to austenitic temperatures can result in temper back, or annealing of adjacent areas of the material that have been hardened previously. This is particularly important in the […]

August 2nd, 2010

Coil Failures Pt. 7: Fabrication of Hardening Inductors

If the induction coil contains numerous brazed joints and, in particular, if there are 90° joints, then water flow in cooling coil turns could be impeded. This problem is more […]