01. AlNiCo Magnets Introduction
Alnico magnets are made of aluminum, nickel, cobalt, copper, iron
and other materials. Based on different processing technology, it
can be divided into cast and sintered magnets. We can supply both
cast and sintered alnico magnets in a variety shapes including
horseshoe, U shape, bar, block, disc, ring, rod and other
customized shapes. Compared to other permanent magnets like neodymium iron boron (NdFeB), the main features are excellent resistance to high
temperature (up to 550℃) and high residual induction.
Usually supplied in un-plated condition
If specially requested by customers, we can plate alnico magnets
with NiCuNi. But as it has weak adhesion to plating, NiCuNi plating
might flake off if not handled properly.
Cast alnico magnets are mainly applied in automotive parts,
instruments, electro-acoustic, electrical, teaching equipments,
aviation and military areas. Sintered Alnico magnets are widely
used in fields of instrumentation, communications, electronic,
magnetic switches, sensors and others.
Given the low coercive force of alnico permanent magnet , in order to avoid irreversible demagnetization or disorder of
magnetic flux distribution, alnico magnets shall be strictly kept
apart from other magnetic materials in actual application or
shipping process, especially neodymium magnet material.
With the principle of quality, credit, price concessions and prompt
delivery, we warmly welcome new and old customers to make
02. Cast AlNiCo Magnet
We supply Cast Alnico magnets with stronger magnetic performance
than Sintered Alnico. And cast Alnico permanent magnets can be
customized into different sizes and shapes. No surface treatment is
needed on Alnico magnets owing to their strong resistance to
corrosion and oxidation in extend environmental condition. If some
customers think coated Alnico magnets are better for their
application, we can coat Nickel or Zn on Alnico magnets. However,
coated Alnico magnets look not as beautiful as coated neodymium magnets due to the different material surface and texture.
The manufacturing process of Cast Alnico magnets mainly includes
nine processes. Melting process is special handicraft technology
which is not easily controlled. The operators need certain skills
and experience to handle it. Material mixing and magnetic heat
treatment are key procedures.
The main manufacturing process of Cast Alnico magnets is listed as
Raw material → Mixing → Melting → Molding Casting → Heat Treatment
→ Magnetic Testing → Grinding → Inspection → Finalpermanent magnet
Typical Magnetic Performance for Cast AlNiCo Magnet —USAStandard
Typical Magnetic Performance for Cast AlNiCo Magnet — Chinese
03. Sinter AlNiCo Magnet
According to the different manufacturing process, alnico permanent magnet material can be divided into two main series of Cast Alnico magnet
and Powder Sintered Alnico magnet.
Powder Sintered Alnico series is divided into isotropic Alnico and
thermo magnetic treatment anisotropic Alnico.
Sintered Alnico magnets are slightly weaker than Cast Alnico
magnets in magnetic strength, but their sizes and dimensional
tolerance are relatively smaller than cast ones.
Sintered Alnico magnets are more often used in micro/small motors,
permanent magnet motor, relays and some small instruments.
Sintered Alnico magnets are made from powdered mixture of raw
materials that are pressed into a die under tons of pressure. They
are then sintered in a hydrogen atmosphere and cooled in an
anisotropic or isotropic environment.
The main manufacturing process of Sintered Alnico magnetic materials is listed as following.
Raw material → Mixing → Powder → Pressing → Sintering → Heat
Treatment → Magnetic Testing → Grinding → Inspection → Final Alnico
Typical Magnetic Performance for Sintered AlNiCo Magnet — Chinese
Why choose us?
1) More than 10years experience in NdFeB manufacturing and
2) Strategic partner of several world top 500 Enterprise, operating
well under TS16949
3) Samples and trial orders are welcome
4) Competitive Price & Short Lead Time, cause it is directly
from real producer/Manufacturer.
5) Professional suggestion or advice is available when you have
doubts in design.
If you have any question about us, welcome to contact us anytime.
Mobile:0086-15757403848 (Whatapp/Wechat )