Induction Heat Treating Archives

November 30th, 2017

Induction Heating: Everything You Wanted to Know, But Were Afraid to Ask (December 2017)

Question of the Month: What is the difference between auto-tempering and self-tempering? Answer: Sometimes the terms auto-tempering and self-tempering are incorrectly used interchangeably. Here we will explore the differences […]

March 7th, 2017

Induction Heating: Everything You Wanted to Know, But Were Afraid to Ask (March 2017)

Question of the Month: We use an induction process where we need to include physical barriers and/or a safety warning for people with medical devices such as metallic implants and […]

November 29th, 2016

Induction Heating: Everything You Wanted to Know, But Were Afraid to Ask (November 2016)

Question of the Month: For a few years, we scan hardened relatively straight shafts using a 30 kHz machine. Our new component has a 4.8-mm radial step (sharp shoulder) that […]

July 25th, 2016

Induction Heating: Everything You Wanted to Know, But Were Afraid to Ask – Question of the Month (August 2016)

Question of the Month: For quite a while after scan hardening, we experience low hardness readings (52-55 HRC) in areas where the diameter of our 1045 steel hollow shaft changes. […]

January 31st, 2012

Superior induction heating design with computer modeling

Numerical computer modeling is a major factor in the successful design of induction heating systems. Induction heating is a complex combination of electromagnetics, heat transfer, and metallurgical phenomena involving many […]

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 […]

March 29th, 2010

Case Hardening: Solid vs Hollow Shafts

Induction surface (case) hardening of hollow shafts has unique features compared with hardening of solid shafts. With solid shafts, the core temperature typically does not rise significantly during heating. The […]

February 22nd, 2010

Single-Coil Dual-Frequency: Hardening of Gears pt. 1

Some induction practitioners have heard about simultaneous dual frequency gear hardening. Coil current waveform comprises two appreciably different frequencies making effect of two single frequency inverters working on the same […]