Permendur 2V

Permendur 2V has a significantly higher saturation magnetic flux density (Bs ≥ 2.35 T) than silicon steel (approximately 2.0 T) and nickel-iron alloys (approximately 1.6 T), enabling higher power density in a smaller volume and weight. Additionally, its Curie temperature (approximately 980°C) is much higher than that of silicon steel (approximately 750°C), resulting in slower magnetic performance degradation at high temperatures. This makes it particularly suitable for cutting-edge applications with strict requirements for weight and high-temperature stability, such as aerospace motors and military power supplies.

The final magnetic properties of Permendur 2V are highly dependent on the heat treatment regime. The recommended process is to heat in a hydrogen or vacuum atmosphere to 820°C – 880°C, hold for 2 – 4 hours (depending on cross-sectional thickness), and then cool at a controlled rate (typically ≥ 100°C/h) to below 300°C. The grain size after annealing directly determines the permeability and coercivity, which must be strictly controlled. Note: Heat treatment should be performed after final mechanical machining to avoid machining stresses that could degrade magnetic properties.

Permendur 2V exhibits better ductility than most soft ferrite magnets, allowing it to be formed using conventional machining methods such as turning, milling, drilling, and grinding. However, note that this alloy has a significant tendency to work-harden. It is recommended to use carbide tools with lower cutting speeds and moderate feed rates. For extensive machining, it is advisable to perform the machining first in an annealed and softened state, then carry out the final annealing after machining to restore optimal magnetic properties.

Continuous operating temperature: It is recommended to be ≤ 400°C, where the magnetic performance retention rate is ≥ 87% (Bs ≈ 2.1 T). Short-term exposure: It can withstand short-term high-temperature shocks of 500°C – 600°C, but magnetic performance may experience reversible or irreversible degradation, depending on cooling rate and exposure time. Note: Long-term exposure above 500°C may cause microstructural changes; performance verification is recommended before use.

Yes. Permendur 2V offers superior coercivity (Hc ≤ 160 A/m) and resistivity (≈ 0.40 μΩ·m) compared to conventional silicon steel, resulting in good core loss performance in medium and high-frequency magnetic fields (such as 400Hz aviation power, radar systems, and high-speed motors). However, note that as frequency increases further (> 1 kHz), eddy current losses become significantly higher. It is recommended to use thin strip laminations (≤ 0.1 mm) or powder metallurgy forms to reduce high-frequency losses.

A