Iron-nickel alloy strip, 1J48 soft magnetic alloy, nickel alloy coil 1J48

规格：

齐全

包装：

标准

用途：

广泛

low-frequency soft magnetic material with high magnetic permeability and low coercivity in weak magnetic fields. Early iron-nickel alloys were used for telephone communications. Later, a heat treatment process and vacuum smelting method were used to greatly improve the alloy properties. The magnetic permeability of iron-nickel alloy containing

% in a weak magnetic field is about

~

times higher than that of silicon steel. It is commonly used in sensitive relays, In magnetic shielding, telephone and radio transformers, precision AC and DC instruments, current transformers (see transformers). Adding elements such as molybdenum, manganese, cobalt, copper, and chromium to iron-nickel alloys can produce ternary materials with greater initial magnetic permeability

and large magnetic permeability

, quaternary iron-nickel alloy.

Iron-nickel alloy has a narrow and steep hysteresis loop, a large magnetic permeability and a small coercive force in a weak magnetic field

But its resistivity Not large

Only suitable for operation in the frequency range

below MHz otherwise the eddy current loss will be too large. Iron-nickel alloy has good processing performance and can be made into various components with complex shapes and precise size requirements. However, its magnetic properties are relatively sensitive to mechanical stress. Process factors have a greater impact on the magnetic properties, such as stamping, which will reduce

and the consistency of product performance is not easy to meet. The cost of iron-nickel alloy is high. The properties and uses of commonly used iron-nickel alloys are listed in the table.

In addition to Invar, Kovar and Permalloy, iron-nickel alloys also include the following alloys:
++
and
++< br/> It has a high thermal expansion coefficient and can be used as a bimetal heat exchanger for thermostats and various temperature regulating devices.
+
It is called platinum substitute. Its expansion coefficient is the same as platinum and has good corrosion resistance. It can replace platinum in some occasions.
+
Can be used as vacuum tube sealing wire instead of platinum.
++
It is a constant elastic alloy with a thermoelastic coefficient equal to zero and is commonly used as hairpins, watch balances and precision instrument parts. Molten ingots are processed into finished products by pressure.