Soft magnetic iron-cobalt-based alloy and process for manufacturing it

摘要

A soft magnetic alloy consists essentially of 10 percent by weight≦Co≦22 percent by weight, 0 percent by weight≦V≦4 percent by weight, 1.5 percent by weight≦Cr≦5 percent by weight, 0 percent by weight

主权项

1. A soft magnetic core for an electromagnetic actuator comprising a soft magnetic alloy consisting essentially of:
an amount of cobalt Co, such that 10 percent by weight≦Co≦22 percent by weight, optionally an amount of vanadium V, such that 0 percent by weight≦V≦4 percent by weight, an amount of chromium Cr, such that 1.5 percent by weight≦Cr≦5 percent by weight, an amount of manganese Mn, such that 0.4 percent by weight≦Mn≦1 percent by weight, optionally an amount of molybdenum Mo, such that 0 percent by weight≦Mo≦1 percent by weight, an amount of silicon Si, such that 0.5 percent by weight≦Si≦1.5 percent by weight, an amount of aluminum Al, such that 0.1 percent by weight≦Al≦1.0 percent by weight, and the remainder iron, and incidental impurities of up to 200 ppm nitrogen, up to 400 ppm carbon, and up to 100 ppm oxygen, wherein the content of the elements chromium and manganese and molybdenum and aluminium and silicon and vanadium are such that 4.0 percent by weight≦(Cr+Mn+Mo+Al+Si+V)≦9.0 percent by weight; wherein the alloy has a specific electrical resistivity ρ>0.50 μΩm, a yield strength Rp0.2>340 MPa, a saturation J(400 A/cm)>1.00 T, a coercive field strength Hc<3.5 A/cm and in its final annealed state has an elongation at rupture value of AL>2%.