| 摘要 |
PURPOSE:To produce an iron alloy plate having specific lattice and grain size and small magnetic anisotropy by cooling quickly the iron alloy plate which contains a specific amt. of Be, Al, etc. and in which said elements have the relation shown by the specific formulas. CONSTITUTION:An iron alloy plate contg. at least one kind selected from, by weight %, <=1.5% Be, <=5.0% Al, <=7.5% Si, <=2.0% P, <=3.0% Ti, <=3.0% V, <=6.0% Ge, <=7.0% As, <=6.0% As, <=6.0% Mo, <=7.0% Sn, <=6.0% Sb, and <=8.0% W in such a way that the X expressed by the formula I (within parenthesis is weight %) satisfies the formula II and consisting of the balance substantially Fe is quickly cooled within a 400 deg.C range from the m. p. thereof or under. The iron alloy plate of which the degree of order S1 in comparison with the degree of order S0 of the superlattice formed when the iron alloy is cooled to a room temp. while heat equil. is maintained is <=(0.95XS0) and which has >=20mu average grain size of the crystal grains and small magnetic anisotropy is obtd. |
