Patent ID: 7226515
Filing Date: 2007-06-05
Classification: B22D,C21D,C22C,C22F,H01F

Abstract:
1. A cast slab for a Fe—Ni based permalloy comprising Ni: 30–85 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 0.0060 wt %, Al: not more than 0.02 wt % and the remainder being Fe and inevitable impurities, and having such a cast texture that an area ratio of equiaxed crystal is not more than 1%, for hot roll sheet provided Ni segregation amount C Ni s represented by the following equation is not more than 0.15 wt %: wherein Ci Ni s: a standard deviation of X-ray intensity (c.p.s.) Ci