Ambrell's Induction Annealing | Application Notes & Guides

Annealing a Stainless Steel Medical Wire

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 Some process development may still be needed at the customer site once the induction system is delivered to account for the unique fixture/ handling techniques used 

Annealing Stainless Steel Braids

Heating took just 2-5 seconds depending on the sample used, meeting the client's requirements.

Annealing Copper Tubing

A specially designed multi-turn helical coil was used to provide the required heat to the various copper tubes.

Annealing a Weld Seam (Steel Assembly)

To heat the weld seam of the steel part assembly

To heat a stainless steel tube

A custom-designed single-position multi-turn helical coil was built to generate the required heating for the application.

Annealing Springs for Stress Relief

Testing was successful, with a time-to-heat of 15 seconds. This client had been using an oven but was interested in changing to induction heating.

Annealing a Metal Plate

To heat a metal plate for an annealing application; the customer wanted to improve the heating time they were seeing with an open flame/torch.

Heating Steel Parts for a Bending Application

Clients are looking to upgrade cutting-tool torch brazing process with a fast, controllable and repeatable process.

Annealing a Magnetic Steel Strip

A custom-designed single position multiple-turn helical coil was built to generate the required heating for this annealing application. Initial tests were conducted to optimize the power delivered to the part.

Annealing Copper Wire Connectors

To anneal electrical crimp contacts of different dimensions. The client took advantage of THE LAB's expertise to prove out their process in a way that met their time, quality and budgetary requirements.

Annealing steel tubes in an inert atmosphere

Induction annealing heats steel tubes to °F ( °C) in an inert atmosphere for very small areas within precise production tolerances. A two-turn concentrator coil is used to heat the stainless steel tube. The annealing process takes place in an inert atmosphere to prevent oxidation.

Annealing a Weld Seam with Induction

The client is building a system with induction. Induction achieved the client's speed requirements and induction's modest footprint works well within the system. With induction you can expect the same result every time.

Anneal 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 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 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. Brass annealing with induction ensures each and every case is quality annealed, reducing variation and damage typically found in mass annealing processes.

Annealing 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 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)

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 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 (dental)

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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 (handrail bending)

Employing brass annealing with induction to form tubes into handrails, a twelve-turn helical coil was used to heat an 8 x 3 in (20.3 x 7.6 cm) area above the end of the tubes. 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 in (100 mm) of zinc wire for this zinc wire application. The wire is placed in the coil for 5 seconds to reach the desired condition just prior to the forming process.

Annealing a hydraulic motor shaft prior to machining

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

Annealing aluminum fuel tank fill neck for bending

An eight-turn helical is used to heat the aluminum tube for annealing. To anneal the full length of the tube, the tube is placed in the coil and heated, and then the tube is bent while hot to prevent cracking.

Annealing of stellite tips on saw blades

To anneal the affected zone of a saw blade after the stellite tips have been welded in place, a split four-turn helical coil is used to allow the blade to move evenly through 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

To anneal a copper wire used in electric motors, a twelve-turn helical coil is used with an inserted ceramic tube to isolate the copper wire from the coil and to allow the 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

To anneal an area around an oval cutout 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

To prepare a wire mesh for press brake bending, induction is used to heat 3 in (76.2 mm) from the end of the wire mesh 60 in (1.52 m) long. This provides a faster production process, higher efficiency, lower energy costs and a fast, controllable hands-free process that involves no operator skill.

Annealing both ends of copper tubing for refrigeration

Induction heating applies heat to very specific areas, faster process time, increased production and high efficiency. In this application, both ends of a copper tube are heated to anneal them as soft as possible 1.5 in (38.1 mm) from each end, as well as retaining full hardness next to the anneals.

Annealing brass electrical contact for crimping

Induction annealing brass contacts provides hands-free heating that involves no operator skill, pinpoint accuracy and consistent results. To anneal a small area of an electrical contact for crimping, a one turn hairpin coil is used to heat the electrical contact to °F.

Annealing a steel shaft for stress relief

Flameless induction heating allows processes - formerly done in batch furnaces - to be done in-line saving time and energy. No rotation of parts is 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. This allows for pinpoint accuracy and repeatability, cycle after cycle.

Annealing Lock Nuts

A three-turn helical coil is used to heat the locknut to Ă °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

Induction annealing heats the end of a metal stamp to mushroom instead of cracking/splitting when struck by a hammer. Two helical coils are used to heat the ends to the required temperature. Two part sizes can be run in each of the coils, using the same machine settings except for cycle time.

Annealing stainless steel bread saw blades

Induction annealing improves blade quality, decreases scrap product and is easily incorporated into existing production lines. To anneal these stainless steel bread cutting saw blades, a three-turn helical induction heating coil is designed and developed for this application.

Annealing Tungsten Rods

A multi-turn induction annealing coil is used to heat various rod diameters. An optical pyrometer is used to measure the temperature of the part inside the induction coil. Initial static tests are conducted, then dynamic tests are run to confirm the results of the static tests

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. Process goals include automation, production rate increase, and elimination of stress cracking resulting from flame heating.

Achieving Uniform Hardness on Saw Blades

Induction annealing is used to draw-back steel saw blades to a desired Rockwell hardness at a rate of 60 inches per minute. Resulting mean hardness of 50.3 Rc is measured for fifteen saw teeth on a Wilson Superficial Hardness Tester, fulfilling the ultimate goal established by the customer.

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Hi,
I will start annealing and I would like to know which system is the best. The propane one with torch, induction one like AMP and the salt one.
What I read torch or fire is the less one, but for the induction and salt one I don't know. Some said induction is best but have some problem and other said it was salt the best.
Can you help me to know except the price because one cost ,00 Canadian and the other one cost 100,00 Canadian so big difference.
Which one is the best and most important why? I have a salt bath and just got done making an induction annealing machine.

Salt bath is stupid easy and made even easier putting it together with a PID temp controller. Make (or buy) different caliber cartridge holders if you need them and anneal away.

The induction machine, even though slightly technical to put together if you don't have any electrical experience, works great and probably the greatest thing, less messy. Plus, it is a plug in and go thing. Don't need to wait for the salt to get to temp which takes about 20 minutes in my Lee pot.

I'll keep my salt bath for .50 BMG for the meantime, unless I can figure out how to get it to work properly with the induction machine, which I am sure I will be able too. Nice how-to on making the induction machine on this forum. If for some reason you don't see it on the first page of this forum when you come back, search for the GinaErick.

I will start annealing and I would like to know which system is the best

I don't have an AMP, but there is no doubt in my mind that is best. But, I couldn't justify the extra expense over using propane. I used a $25 setup successfully for years. Then I splurged (at least for me) and bought a Mike's Reloading Bench annealing machine. It is nice, but I can't say it does it any better than I did with my $25 two torch setup. If done properly, I think any of the three can do the job successfully.

If price is no issue the AMP is the go-to unit. If it is too pricey, I have been using propane for years with zero problems (aside from running out of gas when I am not diligent).

I have been using a torch for years. Simple cheap and it works. Already had the torch. 0 dollars. Hard to prove an induction annealer is any better. Varmint hunting rifle groups always under .350". Short range serious BR shooters throw their cases away after about 8 firings.

I have been using a torch for years. Simple cheap and it works. Already had the torch. 0 dollars. Hard to prove an induction annealer is any better. Varmint hunting rifle groups always under .350". Short range serious BR shooters throw their cases away after about 8 firings.

Well take it from this serious SR benchrest shooter, I don't throw my cases away after about 8 firings. Hell they are just starting to get broken in at that point. Half the guy's that I shoot against load at the range. They take about 25 cases that they use over and over again and have triple the amount of firings that you say should be thrown away. I just don't see what you are saying. Read Smokin' Joe's 30BR case prep article. He said that he used the same brass for a barrel that had rounds thru it. If your handy and have some electronic skills, try building the GinaErick induction annealer. Cost for the basic unit is about $350.00. Since the post on building it was published last year (August), many members from this web site have built theirs, others from oversea's also. So far there have been over 71,000 views on that post. Other builders have add improvements and up grades. It does a great job of precise and consistent annealing
Check it out..

http://forum.accurateshooter.com/threads/induction-brass-annealer-redux./

I have been using a torch for years. Simple cheap and it works. Already had the torch. 0 dollars. Hard to prove an induction annealer is any better. Varmint hunting rifle groups always under .350". Short range serious BR shooters throw their cases away after about 8 firings.

That's funny, most that I know, including a couple of Hall of Fame inductees, routinely get 45-50 firings on their cases before they even THINK about retiring them.

Well take it from this serious SR benchrest shooter, I don't throw my cases away after about 8 firings. Hell they are just starting to get broken in at that point. Half the guy's that I shoot against load at the range. They take about 25 cases that they use over and over again and have triple the amount of firings that you say should be thrown away. I just don't see what you are saying. Read Smokin' Joe's 30BR case prep article. He said that he used the same brass for a barrel that had rounds thru it.

I stand corrected. I thought 8 firings was in Tony Boyers book. He says 20 cases 400 firings. Twenty times each.

I have a salt bath and just got done making an induction annealing machine.

Salt bath is stupid easy and made even easier putting it together with a PID temp controller. Make (or buy) different caliber cartridge holders if you need them and anneal away.

The induction machine, even though slightly technical to put together if you don't have any electrical experience, works great and probably the greatest thing, less messy. Plus, it is a plug in and go thing. Don't need to wait for the salt to get to temp which takes about 20 minutes in my Lee pot.

I'll keep my salt bath for .50 BMG for the meantime, unless I can figure out how to get it to work properly with the induction machine, which I am sure I will be able too. Nice how-to on making the induction machine on this forum. If for some reason you don't see it on the first page of this forum when you come back, search for the GinaErick.

Can you expand a little on the temperature controller. How is it done.....what do you buy? I am using an Anealeeze modified with a $10 PWM speed control which has a digital readout for repeatability. I get consistent ES's and SD's in the single digits and have well over 25 firings on some .308 Palma brass with no neck issues. Cost of the Anealeeze modded was about $300 but after reading Bryan Litz's Modern Advancements in Long Range Shooting Vol 2 I am wondering if even that was too much to invest. He is doing more research on the subject for Vol 3 but until it is released and testing shows some positive benefits I would not drop a whole lot of money on a machine. Shooters got by for years using nothing more than a torch, a socket and a drill and consistently shot in the 1's and had brass life in the double digits