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特殊用途镍合金
    发布时间: 2020-07-13 10:53    

合金200-镍200®-UNS N02200-Ni99,6-2.4060-Ni99,2-2.4066
合金201-镍201®-UNS N02201-2.4068-2.4061
合金205-镍205®-UNS N02205
合金233-镍233®-UNS N02233
合金 270-镍270®-UNS N02270-2.4050-Ni99,8
低合金镍
合金 211-镍211®-UNS N02211
合金301 -Duranickel301®-UNS N03301-2.4128
铜镍合金
合金400 -Monel400®-UNS N04400-2.4360-NiCu30Fe
合金R-405 -MonelR-405®-UNS N04405
合金 K500-蒙乃尔K-500®-UNS N0550-2.4375-NiCu30Al

特殊合金,包括软磁合金和形状记忆合金

低膨胀镍合金
殷钢 36-1.3912-UNS K93600
殷钢 42-1.3917-UNS K94100
杜美-1.3918-UNS K94101
合金 48-1.3922-UNS K94840
因瓦49-51Fe-49Ni
合金 52-2.4478-UNS N14052
合金 54-2.4475
超级因瓦合金-63Fe-32Ni-5Co-UNS K93500
Kovar(fernico)-合金K-1.3981-UNS K94610
埃林瓦尔 52Fe-36Ni-12Cr
铬铁 37Fe-30Ni-25Co-8Cr

磁性软镍合金
坡莫合金 78.5Ni-21.5Fe
钼坡莫合金 78.5Ni-17.7Fe-3.8Mo
铬坡莫合金 78.5Ni-17.7Fe-3.8Cr
超级合金79Ni-15Fe-5Mo-0.5Mn
金属玻璃 40FE-40Ni-14P-6B
金属玻璃 40FE-38Ni-4Mo-18B

铁 37Fe-30Ni-25Co-8Cr
特殊合金–说明

镍合金具有许多独特的性能,可用于多种特殊应用。此处列出的合金的特性与磁性和物体的形状有关,并随温度的变化而变化。


MAGNETICALLY SOFT NICKEL ALLOYS

In terms of magnetic properties, metals can be divided into five categories:

       Paramagnets
       Ferromagnets
       Ferrimagnets
       Antiferromagnets
       Antiferromagnets

The magnetic properties of metals are influenced by temperature. Among all metals only iron, nickel and cobalt show ferromagnetic properties at room temperature.

The rise of temperature causes ferromagnets to lose their magnetic susceptibility. When the temperature reaches a certain value, the ferromagnetic material becomes a paramagnetic one. This value is called the Curie Temperature of a metal.

The magnetic permeability of ferromagnetic metals depends on the intensity of the external magnetic field. When such a field is removed, ferromagnets still display residual magnetism. By means of this force, permanent magnets attract or repel other metals or magnets.

A magnetized ferromagnetic alloy still exhibits residual magnetism, which wends the same direction as the field did. Demagnetization requires an oppositely oriented field of a certain strength, called coercion. If this field is stronger than said strength, the alloy gets magnetized -directed the opposite way then the field.

Each remagnetization involves irreversible dissipation of energy that’s called hysteresis energy loss.

Magnetically soft nickel alloys – properties

       High initial permeability µ
       High max relative permeability
       Constant permeability in changing temperatures
       High saturation magnetostriction
       An immediate reaction to the magnetic field's change
       Low Curie Temperature
       High resistivity
       Low eddy-current loss in alternating flux
       Narrow hysteresis loop (magnetization – demagnetization loop)
       Low hysteresis-energy loss

Shortly put- magnetically soft alloys are easy to magnetize, demagnetize and remagnetize.
     
Nickel-containing magnetically soft alloys – applications

       Nickel-containing magnetically soft alloys are used extensively in a variety of applications, including:
       Audio-related transformers
       Magnetic amplifiers
       Transducers
       Radar pulse transformers
       Synchronous motors and torque motors
       Loading coils
       Radiofrequency shields (RF shields)
       Temperature compensators

Permalloy is a unique magnetically soft alloy. Its feature is an almost rectangular shape of the hysteresis loop and two remanence values.

Magnetically soft amorphous metals
Amorphous metals (metallic glass) are characterized by high resistance, following low hysteresis loss and the ability to work at high frequencies.

Nickel-containing, magnetically soft amorphous metals are:
       Metglas 40Fe-40Ni-14P-6B
       Metglas 40Fe-38Ni-4Mo-18B

Magnetically hard nickel-containing alloys
Magnetically hard alloys are used to produce permanent magnets that exhibit strong residual magnetism and aren’t easy to demagnetize and remagnetize.

Alnico alloys are used to craft permanent magnets.

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