Patent ID: 6656419
Filing Date: 2003-12-02
Classification: B22D,C21D,C22C,C22F,H01F

Abstract:
A Feâ€”Ni based permalloy comprising Ni: 35-40 wt %, C: not more than 0.015 wt %, Si: not more than 1.0 wt %, Mn: not more than 1.0 wt %, P: not more than 0.01 wt %, S: not more than 0.005 wt %, O: not more than 0.006 wt %, Al: not more than 0.02 wt % and the remainder being Fe and inevitable impurities, and having such magnetic properties that a maximum magnetic permeability &mgr;m is not less than 50000, an initial magnetic permeability &mgr;i is not less than 10000 and a coercive force Hc is not more than 0.05 (Oe), provided that Ni segregation amount CNis represented by the following equation is not more than 0.15 wt %:CNis=analytical value of Ni component (wt %)Ã—CiNis(c.p.s.)/CiNiave.(c.p.s.) wherein CiNis: a standard deviation of X-ray intensity (c.p.s.)CiNiave.: an average intensity of total X-ray intensites (c.p.s.).