Metallurgical Aspects Archives

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 […]

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

Question of the Month: We process copper alloy bars and billets in our factory. Gas furnaces have been used to heat billets made of C14500, C44300, C46400, C48500, C64200, and […]

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. […]

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 […]

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 […]

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 […]

July 26th, 2010

Webinar September 29th, 2010

Inductoheat & Radyne Present A Webinar On: AVOIDING PREMATURE COL FAILURES. DESIGN AND FABRICATION OF LONG LASTING INDUCTORS. Presenter – Dr. Valery Rudnev, FASM Duration 1 hour: Introduction (3 min) […]

May 24th, 2010

Coil Failures: pt. 11a Frequency Selection

Frequency selection not only affects the performance of the induction system but it also has a significant effect on coil life. Choice of an improper frequency is the most common […]

May 13th, 2010

Induction Heating: Eliminate Cracking at Holes pt. 1

There are two factors that can cause the overheating: • An increase of power density (heat source) due to the redistribution of eddy current flow. • The lack of adjacent […]

November 29th, 2016

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

September 30th, 2016

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

July 25th, 2016

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

March 14th, 2011

Coil Failure pt. 4: Electromagnetic Edge Effect

February 7th, 2011

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

January 31st, 2011

How do I select inductors for billet heating?

January 17th, 2011

Metallurgical Insights: Pt 6: Stripping phenomenon

November 18th, 2010

Prevent rust staining from the quenchant pt. 1

August 24th, 2010

Keeping Your Temper With Flux Concentrators

July 26th, 2010

Webinar September 29th, 2010

May 24th, 2010

Coil Failures: pt. 11a Frequency Selection

May 13th, 2010

Induction Heating: Eliminate Cracking at Holes pt. 1

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