What Is Induction Annealing?

Induction annealing is a process in which a precise electromagnetic field is used to heat an electrically conductive material making it more workable by reducing its hardness.

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What Is Induction Annealing?

Induction annealing is a process in which a precise electromagnetic field is used to heat an electrically conductive material making it more workable by reducing its hardness.

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What Benefits Does Induction Annealing Offer? 

  • Meets tight production tolerances with precise localized heat to small areas creating pinpoint accuracy

  • Increases production rates with faster heating cycles

  • Reduces defect rates with repeatable, reliable heat

  • Eliminates variability from operator-to-operator, shift-to-shift

  • Maintains metallurgical characteristics of the individual metals

Popular Induction annealing Application Notes

Select from our most requested annealing notes to learn how induction can improve the efficiency, effectiveness and safety of your heating process.


Annealing a Weld Seam (Steel Assembly)Annealing a Weld Seam (Steel Assembly)

Annealing with induction required 45 seconds to heat the tube to the target temperature. This application met the client's objective

Anneal copper tubes; formed tubes & pipesAnneal copper tubes; formed tubes & pipes

Induction annealing offers the same result every time, which makes it ideal for a high volume process such as this one. The previous oxidation issue forced them to polish the handles which added a step in their manufacturing process.

Annealing a stainless steel handleAnnealing a stainless steel handle

The client wants to anneal a stainless steel tube while avoiding oxidation. Induction annealing offers the same result every time, copper tubes of various geometries heated to temperature in a matter of seconds, which makes it ideal for a high volume process such as this one.

Annealing brass ammunition casingsAnnealing brass ammunition casings

The ammunition industry has been annealing with inefficient methods which require much floor space, lack consistency, create excess inventory carry costs, and don't permit in-process inspections. Induction annealing ensures each and every case is quality annealed, reducing variation and damage typically found in mass annealing processes.

Annealing stainless steel tubesAnnealing stainless steel tubes

Annealing with induction heated the client's parts to the desired temperature in less than three seconds. Their previously-used gas oven required twice as much heating time as the induction heating process. Induction annealing is more energy-efficient and requires less space compared to a gas oven.


Annealing stainless steel tubingAnnealing stainless steel tubing

Looking to replace an inefficient oven process, a stainless steel tube is heated in just 30 seconds, improving efficiency for this application. A custom-designed single position multi-turn helical coil was built to generate the required heating for this induction annealing application

Annealing a copper wire connector (crimp)Annealing a copper wire connector (crimp)

The client wanted to be able to anneal parts of various sizes, which was achieved with a concentrator coil. Induction annealing is a new process for the client, and Ambrell's lab expertise proved very valuable when creating the process...

Annealing steel wire for a medical applicationAnnealing steel wire for a medical application

Induction annealing achieved the targeted steel wire temperature within three seconds. Ambrell performed a free laboratory test, designed a cost efficient, in-house process and connected them with an automation partner to maximize productivity. The client now has better control over their end product.

Annealing stainless steel caps for a dental applicationAnnealing stainless steel caps for a dental application

Our client had a requirement to anneal large quantities of work-hardened stainless steel crowns. Induction was suggested for its precise, controllable heating. Since oxidation is unacceptable in the finished dental product, induction heating is the appropriate choice for heating in an inert atmosphere.

Annealing brass and bronze tubing prior to bending to form handrailsAnnealing brass and bronze tubing prior to bending to form handrails

To anneal brass tubes into handrails, a twelve-turn helical coil was used to heat an 8”x3” (20.3cm x 7.6cm) area above the end of the tubes. Each of the four tubes require a different heat cycle and time to reach the required temperature.

More annealing Application Notes


Frequently Asked annealing Questions


10-Note Induction Annealing Volume

Induction Annealing Vol 1 600We have collected these 10 popular Application Notes to help you understand the many ways induction heating can improve your annealing processes.

Popular annealing Video

More Induction Annealing Resources:

Select from our libraries of materials to help you better understand the benefits annealing with induction heating can bring to your process.

About Induction Heating

Induction heating is a fast, efficient, precise and repeatable non-contact method for heating metals or other electrically-conductive materials. The material may be a metal such as brass, aluminum, copper or steel or it can be a semiconductor such as silicon carbide, carbon or graphite. To heat non-conductive materials such as plastics or glass, induction is used to heat an electrically-conductive susceptor, typically graphite, which then transfers the heat to the non-conducting material.

Read our 4-page brochure; learn more about how the science of induction technology can solve your precision heating problems.

Read 'About Induction Heating'

Brochure: About Induction Heating

Induction Heating Work Coils

The work coil is the component in the induction heating system that defines how effective and how efficiently your work piece is heated.

Read our informative brochure explaining the fundamentals of induction coils and their design.

Read 'Induction Heating Work Coils'

Induction Heating Work Coils

Four Ways To Contact Ambrell for Support

AMBRELL CORPORATION

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The Netherlands
 

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AMBRELL Ltd.

Unit 6, Space Business Centre
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Cheltenham, GLOS, GL51 9FL
United Kingdom

Directions to Ambrell Ltd.Directions

T: +44 1242 514 042

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