Copper Wire Annealing

Greetings from Toronto,

Peter, as you know annealing 6.5 mm wire is not quite standard, therefore machinery for such a dimension is usually not found in the general literature.

Also thanks for your suggestions regarding correctly posting, much appreciated.

To fully anneal 6.5 mm copper at 1m/sec a PlasmaAnnealer will require approx. 90 kW, for 2 m/sec 180 kW are required and so on. By now you are getting, however to rather high investment costs.

If at all possible, the best positioning of a PlasmaAnnealer would actually not be behind the Rod breakdown but at the entrance of the following process. This reduces the required speed and consequently the costs.

The quality of the finished product will be very clean, well controlled tensile and residual elongation. It is important to note that a PlasmaAnnealer does not only anneal but actually starts the process by cleaning the wire.

I would venture that no other method is capable to provide as good results as a PlasmaAnnealer.

For example tests with SiBz (CDA651) wire have shown a residual oxide layer of only 120 Angstrom after annealing with Plasma.

Best Regards,

Willy Hauer
Howar Equipment Inc.
ww.HowarEquipment.com

I read the original problem with interest and thought that a long time ago Syncro had an annealer that would do this size. I also thought about plasma annealer but the only one I have seen for copper wire was also on an enamelling system and while the line speed was fairly high (not compared to same size wire drawing) the wire was small. One problem I could perhaps see is that the wire on the enamelling system was fairly clean entering the annealer.. not sure about 2 awg being similarly clean.

rb

Willy, we did not forget you. We reviewed the Plasmait web site and the maximum diameter we could find in the annealer section was 5 mm. which is a little smaller than 4 AWG.

Frank, we did not forget you either. We went to your web site in Germany. The largest in-line electric annealer you show is the R 560 and the largest single copper wire is 5.60 mm. or about 3.5 AWG.

We also checked the SAMP and Lesmo web sites and found no larger in-line electric annealers.

We believed those to be the four best options.

Gentlemen, if we cannot find it on your web site, we do not read minds.

None the less we are very pleased that you responded.

Best regards to the both of you,
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com

PS. Frank We noticed that for some reason, you are adding two copies to your original posting each time. If you are having some sort of problem, please contact me at ( This email address is being protected from spambots. You need JavaScript enabled to view it. ) and we will see if we can correct it.

Willy. Please always leave a space before and after a web site addresses or an E-mail addresses. Then the links should work properly for you. If you still have problems and you know how to write HTML, the modified HTML pre-written commands here are very easy to use.

Greetings from Toronto,
Peter is forgetting the possible use of Plasma Annealing systems ( www.plasmait.com ) for which neither speed nor diameter present a problem.

However, if the wire can be annealed with a "simple" resistance annealer, as Frank correctly indicates, it will be the most practical solution.

Best Regards,
Willy Hauer
Howar Equipment Inc.
www.howarequipment.com

Hello Raoul,
Here is one source for inline annealing AWG 2.
Niehoff provide several annealers (electrical or inductive) also for bigger diameters (rod break down)
One annealer for the AWG 2 could be the R 800.
Please contact us.

Best Regards
Frank Knobloch
This email address is being protected from spambots. You need JavaScript enabled to view it.

Hello Raoul,

Wow, that's one big copper conductor for in-line electric annealing! (0.257626 inches or 6.543707 mm) I am personally not aware of any company that manufacturers electric in-line electric annealers for copper wire that large. However, sometimes Mr. H.G. Queins ( www.queins.com/de/welcome/ ) ( This email address is being protected from spambots. You need JavaScript enabled to view it. ) has knowledge of such esoteric machinery.

If there are no in-line electric annealers, then the next logical step would be to review copper batch annealers such as those manufactured by Ebner Industrieofenbau Gesellschaft m.b.H in Austria ( www.ebnerhicon.at/ ). Make sure however you have a detailed discussion with them about hydrogen embrittlement and delayed hydrogen embrittlement so that you are comfortable with that subject. You must not end up with hydrogen embrittlement. See thread www.wirenet.org/forum/viewmessages.cfm?forum=12&topic=493

Kindest regards,
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com