La description
General Information Excellent temperature stability, high residual
induction, and relatively high energies characterize Alnico
materials, composed primarily of alloys of Aluminum, Nickel, and
Cobalt. They are manufactured through either a casting or sintering
process. Cast magnets may be manufactured in complex shapes, such
as horseshoes, not possible with other magnet materials. Sintered
Alnicos offer slightly lower magnetic properties but better
mechanical characteristics than cast Alnicos. Cast Alnico 5 is the
most commonly used of all the cast Alnicos. This material is used
extensively in rotating machinery, meters, instruments, sensing
devices, and holding applications, to name a few. Alnico is hard
and brittle. Machining or drilling can not therefore be
accomplished by ordinary methods. Holes are usually cored in at the
foundry, and magnets are cast close to final size and then finish
machined to closer tolerances. Alnico has a low coercive force, and
is easily demagnetized if not handled with care. For optimum
performance of Alnico 5, the magnetic length should be
approximately 5 times the pole diameter or equivalent diameter. For
example, a 0.**0" diameter magnet should be about 1.**0" long.
Because of its higher coercivity, Alnico 8 may be used in shorter
lengths and in disc shapes. Manufacturing Methods Alnico magnets
are manufactured through either casting or sintering processes.
Cast magnets are manufactured by pouring a molten metal alloy into
a mold and then further processing it through various heat-treat
cycles. The resulting magnet has a dark gray exterior appearance,
and may have a rough surface. Machined surfaces have a shiny
appearance similar to steel. Sintered magnets are manufactured by
compacting fine Alnico powder in a press, and then sintering the
compacted powder into a solid magnet. Assemblies We are able to
manufacture metal and other components of finished sub assemblies
using our CNC machining facilities. Assemblies can be fabricated by
adhering magnets with adhesives to suit a range of environments, by
mechanically fastening magnets, or by a combination of these
methods. Due to the relatively brittle nature of these magnet
materials, press fits are not recommended. Surface Treatments The
corrosion resistance of Alnico is considered excellent , and no
surface treatments are required. However, Alnico magnets are easily
plated for cosmetic reasons if required. Machining Alnico is hard
and brittle, and prone to chipping and cracking. Special machining
techniques must be used to machine this material. Holes must be
made by EDM methods. We are fully equipped to machine these
materials to your blueprint specifications. Magnetizing and
Handling Alnico magnets require magnetizing fields of about 3 kOe.
Because of their relatively low coercivities, special care should
be taken to assure that these magnets are not subjected to adverse
repelling fields, since these could partially demagnetize the
magnets. Magnetized magnets should be stored with peers? to reduce
the possibility of partial demagnetization. If Alnicos are
partially demagnetized, they may be easily remagnetized.
Temperature Effects Up to about 1, **0 F, changes in magnetization
are largely reversible and re-magnetizable, while changes above
this are largely structural and not fully reversible or
re-magnetizable. Approximately *0% of room temperature
magnetization is retained at temperatures of up to 1, **0 F.
| Pays: |
China |
| N ° de modèle: |
AlNiCo5\AlNiCo8
|
| Prix FOB: |
(Negotiable)
Obtenir le dernier prix
|
| Localité: |
- |
| Prix de commande minimale: |
- |
| Commande minimale: |
- |
| Packaging Detail: |
- |
| Heure de livraison: |
- |
| Capacité de Fournir: |
- |
| Payment Type: |
- |
| Groupe de produits : |
- |
