Heat treated magnetic material

Abstract

Abstract Magnetic materials having high permeability such as initial permeability of 3,000 to 109,300 and maximum permeability of 5,000 to 461,000, high hardness of 150 to 359 high specific electric resistance, and excellent workability are produced by forming Ni-Fe-Nb alloy consisting of by weight 70 to 85.9 percent of Ni, 5 to 28 percent of Fe, 1 to 14 percent of Nb as main ingredients, and 0.01 to 10 percent of subingredients selected from the group consisting of by weight of 0 to 8 percent of Mo, 0 to 7 percent of Cr, 0 to 10 percent of W, 0 to 7 percent of V, 0 to 10 percent of Ta, 0 to 10 percent of Mn, 0 to 7 percent of Ge, 0 to 7 percent of Ti, 0 to 5 percent of Zr, 0 to 5 percent of Al, 0 to 5 percent of Si, 0 to 5 percent of Sn, 0 to 5 percent of Sb, 0 to 10 percent of Co and 0 to 10 percent of Cu and a small amount of impurities, the alloy being heated at a temperature more than 800*C in a non-oxidizing atmosphere or in vacuum for more than 1 minute to 100 hours corresponding to the composition and cooled to a room temperature from a temperature of more than the order-disorder transformation point of about 600*C at a suitable cooling speed of 100*C/second to 1*C/hour corresponding to the composition, whereby the degree of order is within 0.1 to 0.6 and a more excellent workability than Mo-Permalloy is obtained.

Inventors

• 👤 H Masumoto
• 👤 Y Murakami
• 👤 M Hinai

Bibliographic Details