| 摘要 |
PURPOSE:To manufacture a high magnetic permeability alloy easy in forging working, having large effective magnetic permeability, saturation flux density and superior in wear resistance, and a magnetic recording and reproducing head made thereof by cold working and heat treating Ni base alloy contg. Nb, P, Fe under specified condition. CONSTITUTION:Ingot contg. alloy composed of 60-90% Ni, 0.5-14% Nb, 0.01- 1% P and the balance Fe, or further many kind elements as auxiliary component is hot forged or hot rolled to rod shape, etc., then annealed at >=600 deg.C temp. Next, said material is cold worked to the aimed shape by >=30% working ratio, heated to temp. of 800 deg.C-m.p., and cooled from temp. of order and disorder lattice transformation point or more by the rate of 100 deg.C/sec-1 deg.C/hr according to compsn. of the alloy. The wear resistant, high magnetic permeability alloy for magnetic recording and reproducing head having >3,000 effective magnetic permeability at 1Hz, >4,000G saturation flux density and recrystallization texture of (110)<112> is manufactured.
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