在各种工业中都广泛使用着强磁性永久磁铁,而现今诸如铝镍钴、维卡磁合金一类普遍采用的永久磁铁,都含有稀少、昂贵的钴元素。钴是作为增强铁的永磁性而广为使用的。美国贝尔实验室冶金工程部的Sungho Jin研制成了一种取名为“ChromindurⅢ和Ⅳ”的含钴量仅占5～12％的永磁合金,为通常永久磁铁合金含钴量的三分之一到二分之一,而磁性却达到甚至超过了原有水平。这种低钴磁性合金采用了一种所谓“变形老化”技术,拉长了球形合金微粒,使它们排序,从而形成 Ferromagnetic permanent magnets are widely used in a variety of industries. Nowadays, commonly used permanent magnets such as Alnico and Vicat magnetite contain rare and expensive cobalt. Cobalt is widely used as a permanent magnet for enhancing iron. Sungho Jin, the Bell Labs Metallurgical Engineering Division, developed a permanent magnet alloy with a cobalt content of 5-12%, named “Chromindur III and IV,” which is a third of the cobalt content of a typical permanent magnet alloy One to one half, but the magnetic has reached or even exceeded the original level. This low-cobalt magnetic alloy uses a so-called “de-aging” technique that lengthens spherical alloy particles to sort them to form