make up natural cara make up make up tutorial make up korea make up minimalis make up artis make up mata belajar make up make up wardah alat make up makeup forever indonesia makeup artist jakarta tips make up barbie make up natural make up make up wajah make up pesta make up syahrini makeup mata makeup minimalis peralatan make up make up cantik make up mac make up kit jual make up make up sederhana perlengkapan make up gambar make up vidio make up cara makeup minimalis wardah make up make up pac make up glamour cara memakai makeup make up panggung harga make up make up modern make up alami make up dasar pixy make up make up muslimah make up oriflame make up jepang makeover cosmetic make up ultima make up sariayu grosir make up makeup fantasi makeup pesta tas makeup langkah make up make up pria make up malam alat makeup tahapan make up produk make up shading make up mak up make up kebaya make up jilbab make up inez make up simpel contoh make up cara ber makeup makeup wajah tanpa make up make up terbaru toko make up mac makeup indonesia make up soft urutan make up trik make up makeover makeup brand gusnaldi make up paket make up panduan make up jual makeup brush make up bagus alat2 make up make up gusnaldi aplikasi make up alat alat makeup dasar make up inez make up peralatan makeup make up wanita make up berjilbab make up tebal sejarah make up make up maybeline make up branded make up siang tata cara makeup reseller make up make up muslim make up maybelin warna make up tips make up artist rias make up make up mata make up artis belajar make up make up artist kursus make up kuas make up make up forever indonesia jual make up mac indonesia make up make up artist indonesia harga make up forever jual make up online make up pac make up forever jakarta make up oriflame jual make up forever make up online shop indonesia harga make up sekolah make up grosir make up harga make up maybelline jual make up murah make up terbaru mak up mac make up indonesia sofia make up make up kit murah mac makeup indonesia produk make up jual make up kit make up store indonesia make up forever academy jakarta toko make up online jual make up set jual make up mac make up beauty jual make up branded produk make up mac make up forever harga make up mac indonesia produk make up artis jual make up palette produk make up forever make up palette murah before after make up pengantin before after make up sendiri before n after hasil makeup contoh make up karakter contoh riasan pengantin before n after harga make up wisuda harga make up artist harga make up forever make up wisuda rias wisuda di jogja Daftar harga make up forever daftar harga make up mac daftar harga kosmetik make up forever makeup wisuda harga makeup wisuda kursus make up di yogyakarta kursus make up di jogja kursus make up jogja kursus make up yogyakarta kursus kecantikan di yogyakarta kursus kecantikan di jogja kursus make up artist di jogja kursus rias pengantin di jogja kursus rias di yogyakarta kursus tata rias di yogyakarta rias pengantin muslim jogja jasa kreasi jilbab wisuda yogyakarta jasa rias make up wisuda murah bagus bisa dpanggil tempat make uf di jigja yang bagus rias wisuda murah dan berkualitas yogyakarta pakar kreasi jilbab di jogja make uper natural yogya make up wisuda hijab area jogja make up dan kreasi jilbab yang bagus di jogja jasa make up natural untuk wisuda jogja makeup jogja make up jogja makeup yogyakarta make up yogyakarta makeup wisuda jogja make up wisuda jogja make up wisuda yogyakarta makeup wisuda yogyakarta
Search - Content
Search - People/Events
Search - Forums
Search - Newsfeeds



jobcenterbanner

FacebookLinkedinPinterestYoutube
Welcome, Guest
Username: Password: Remember me
Nonferrous topics such as copper and aluminum, annealing, etc. go here.

TOPIC: Annealing Aluminum Conductors

Annealing Aluminum Conductors 2 years 6 months ago #1321

When annealing a reel compact or compressed aluminum conductor in a furnace what is going on? The conductor goes in hard, then does it go soft at a certain temp. then start to harden again or does it slowly soften as it soaks in the heat??

Just looking for the basic understanding of the process
The administrator has disabled public write access.

Re: Annealing Aluminum Conductors 2 years 6 months ago #1322

Hi Dennis,

Generally speaking, EC grade 1350 aluminum such as that normally used in ACSR is not annealed after drawing.

I wonder if you are talking about aluminum alloys instead of EC grade aluminum. Please clarify this for us. Thank you.

Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641-3212
The administrator has disabled public write access.

Re: Annealing Aluminum Conductors 2 years 6 months ago #1323

8000 series
The administrator has disabled public write access.

Re: Annealing Aluminum Conductors 2 years 6 months ago #1324

The 8000 Series of Aluminum Alloys
The 80000 series of aluminum alloys are the aluminum - lithium alloys. Moreover we believe the aluminum building wire in use in the United States today and the only one approved by the NEC, is the 8000 Series of aluminum alloys. Even though the cable is approved or sizes 12 AWG and larger, we understand no manufacturer produces sizes smaller than #8 (for underground service entrance cable or SEU cable) and #6 AWG for single conductor.

Work Hardening
Adjoining crystals called grains (Not individual atoms.) within alloy structures can “slip” against each other along “slip planes” as the material is loaded or cold worked. An alloy in which slippage of the crystals has not yet occurred is found to be soft. As that soft metal is cold worked (hammered, rolled or stretched (drawn), all at room temperature) then adjoining crystals will move along a slip plane. Each slip plane has a limit to the amount of movement available and so further working will result in successive slippage along other planes. As more work is applied to the metal, the resistance to movement increases greatly and the material is said to “work harden”. Over-working will eventually cause the metal to fracture.

Annealing
a)The original workability of the alloy can be restored by heating the material to a point where a new crystal structure forms, complete with a new set of unworked slip planes. The critical temperature at which this occurs in an alloy is called the recrystallization point and the process is called annealing.

b) Another critical factor in achieving correct annealing is the soak time. This is the minimum time over which the alloy must be held at the designated temperature for full recrystallization to occur. The required soak time is dependent on alloy type and material thickness. Thus as you asked, the alloy takes some period of time to regain its original properties.

Annealing is usually carried out in an air furnace and can be used to remove the effect of cold working non-heat treatable alloys or to remove the effects of heat treatment and cold working from heat treatable alloys. Following the annealing operation, aluminum alloys are designated as being at condition “0”,

c) The air circulation inside the furnace is also critical to ensure that all points within the furnace are at the same temperature so that all the aluminum alloy receives the correct annealing temperature and soak time.

If the annealing temperature is too low or if the soak time is too short to achieve complete recrystallization the most serious issue will be a partial anneal and thus the annealing process will have failed. This means that the alloy will still have some degree of work hardening and thus exhibit a higher than fully annealed strength.

d) Finally, a controlled cooling cycle time is also critically important for heat treatable aluminum alloys once the the soak time is complete. This is because a slow cooling rate allows the small percentage of soluble elements that have found their way into solution the opportunity to once more precipitate out at the grain boundaries. This gives the best possible anneal. Cooling rates for the heat treatable aluminum alloys are typically in the range of 40 to 50 degrees F per hour.

I do hope that this improves your understanding of annealing aluminum alloys.

Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641- 3212
The administrator has disabled public write access.

Re: Annealing Aluminum Conductors 2 years 6 months ago #1325

Thank you!
The administrator has disabled public write access.
Time to create page: 0.300 seconds