Ambrell Induction Heating
Ambrell Induction Heating
benefits of annealing with induction

Induction Annealing

Induction heating systems from Ambrell are used in the annealing process across a variety of industry verticals. Induction annealing is a fast, efficient, precise, repeatable, non-contact method for annealing metals or other electrically-conductive materials. An induction heating system includes an induction power supply which converts line power to an alternating current, delivers it to a workhead and work coil creating an electromagnetic field within the coil.

Our induction annealing equipment and systems are capable of heating very small areas within precise production tolerances, without disturbing individual metallurgical characteristics. Cartridge annealing is a great example of how precise induction heating can be.

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30+ Annealing Application Notes

Click to read how annealing with induction can improve the efficiency, effectiveness and safety of your heating process.

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Annealing a stainless steel tube for a tubing manufacturer

It took 45 seconds to heat the tube to the target temperature for this annealing application, which met the client's objective

Annealing copper tubes to create formed tubes and pipes

Induction 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 handle

Induction 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 ammunition casings

Induction offers the same result every time, while a torch often delivers variation and there is no open flame with induction.

Annealing stainless steel tubes

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

Annealing stainless steel tubing

Looking to replace an inefficient oven process, part is heated in just 30 seconds, improving efficiency for this application

Annealing a copper wire connector (crimp)

The client wanted to be able to heat parts of various sizes, which was achieved with a concentrator coil. This 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 application

The wire achieved the targeted temperature within three seconds. By bringing their process in-house, the client will have better control over the end product. Ambrell was able to perform a free laboratory test and design a process that could enable the client to bring the process in-house in a cost efficient manner, and even connect them with an automation partner to maximize productivity

Annealing stainless steel caps for a dental application

Requirement to anneal large quantities of work-hardened crowns suggests induction for precise, controllable heating. Since oxidation is unacceptable in the finished product, Induction is the appropriate choice for heating in an inert atmosphere... 

Annealing brass and bronze tubing prior to bending to form handrails

A twelve-turn helical coil is used to heat an 8 (20.3cm) area 3 (7.6cm) above the end of the tube. Each of the four tubes require a different heat cycle and time to reach the required temperature...

Annealing a zinc wire prior to forming pellets for air rifles

A fourteen-turn coil is used to heat 3.9 (100mm) of zinc wire. The wire is placed in the coil for 5 seconds to reach the desired condition just prior to the forming process...

Annealing the end of a hydraulic motor shaft prior to machining

A three-turn helical coil is used for annealing the motor shaft. The end of the motor shaft is placed in the coil and power is applied for 20 seconds to reach 1350 °F (732 °C) and turn the steel red hot...

Annealing aluminum fuel tank fill neck for bending

An eight turn helical is used to heat the tube for annealing. To anneal the full length of the tube, the tube is placed in the coil and heated...

Annealing of stellite tips on saw blades

A split four turn helical coil is used so the blade can move evenly though the coil. Each tip of the blade is heated for 5 seconds as it passes through the coil to anneal the affected area...

Continuous annealing of copper wire

A twelve turn helical coil is used. A ceramic tube is placed inside the coil to isolate the copper wire from the copper coil and to allow the copper wire to flow smoothly through the coil. Power runs continuously to anneal at a rate of 16.4 yds (15m) per minute....

Annealing lip on cryogenic dewar

A two turn helical coil is used to heat the lip on the cryogenic dewar. The dewar is placed in the coil and power is applied for 2 minutes to anneal the required 1 heat zone...

Anneal an oval cut-out on a stainless steel tube prior to extrusion

A single turn helical coil is used on the 4 (101.6mm) diameter tubes and a two turn helical coil is used on the smaller diameters.

Annealing the end of steel wire on a woven wire mesh

Induction heating provides faster production process, high efficiency, low energy costs compared to gas furnace, fast, controllable process and hands-free heating that involves no operator skill for manufacturing.

Annealing both ends of copper tubing for refrigeration

Induction heating provides controlled application of heat to very specific area, faster process time, increased production and high efficiency, low energy cost.

Annealing brass electrical contact for crimping

Induction heating provides hands-free heating that involves no operator skill, pinpoint accuracy and consistent results

Annealing a steel shaft for stress relief

Flameless induction heating allows formerly batch process to be done in-line saving time and energy. No rotation of part needed.

Annealing bolt shafts

A three turn helical coil is used to heat the shaft of the bolts for 10 to 12 seconds on the large bolts and 18 to 20 seconds on the smaller bolts using the same coil.

Annealing Lock Nuts

A three turn helical coil is used to heat the locknut to 2150°F for 5 seconds. Induction heating provides repeatable, rapid and accurate heating cycles making it ideal for in-line production processes

Anneal the end of metal stamp sets

One five-turn and two four-turn helical coils are used to heat the end of stamps to the required temperature. Two part sizes can be run in each of coils, using the same machine settings except for cycle time.

Annealing stainless steel bread cutting saw blades

Induction heating provides improved quality of blades at hole punching location, decreased scrap product and is easily incorporated into existing production lines

Annealing Tungsten Rods

A multi turn induction heating coil is designed for heating the various rod diameters. An optical pyrometer is used to measure the temperature of the part inside the induction coil.

Band annealing on Titanium fasteners

Induction heating can be incorporated easily with pick and place robotics, delivers a flameless process in which heating is limited to the specific area.

Annealing Brazing Wire

Induction heating provides higher productivity of 27' (8.2m) per minute, a reduction in surface oxidation & scaling with consistent, repeatable results

Selectively Annealing Thread Ring Gauge Blocks

To selectively and uniformly anneal two sections of a thread ring gage block from the hole to the outside surface from a hardness of Rc 59-61 to Rc 45.

Achieving Uniform Hardness on Saw Blades

Resulting mean hardness of 50.3 Rc was measured for fifteen saw teeth on a Wilson Superficial Hardness Tester, fulfilling the ultimate goal established by the customer.

Annealing steel tubes in an inert atmosphere

To heat steel tubes to 2000 ºF (1093 ºC) in an inert atmosphere for very small areas within precise production tolerances

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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'


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.

Provide a little of your business contact information to read our informative brochure explaining the fundamentals of the induction work coils and their design.


Read 'Induction Heating Work Coils"