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Fe-Cr-Co合金是近10年来新出现的可加工永磁材料。这种合金的磁性已经达到甚至超过铸造AlNiCo5的水平。它具有良好的加工性,能够承受冷热塑性变形,通过压力加工可制成丝、管、带、棒等。 Fe-Cr-Co合金的磁硬化机理与铸造AlNiCo合金相似:在高温时形成体心立方结构的α相,快速淬火后形成过饱和固溶体,随后在640℃附近等温处理,发生α→α_1+α_2分解,α_1为富含FeCo的强磁性相,α_2为富含FeCr的弱磁性相,两相交替周期排列形成“调幅结
Fe-Cr-Co alloy is a new type of machinable permanent magnet material that has emerged in recent 10 years. The magnetic properties of this alloy have reached or exceeded the level of cast AlNiCo5. It has good processability, able to withstand hot and cold plastic deformation, through the pressure processing can be made of silk, tubes, belts, rods and so on. The magnetic hardening mechanism of the Fe-Cr-Co alloy is similar to that of the cast AlNiCo alloy: the α-phase of the body-centered cubic structure is formed at a high temperature, the supersaturated solid solution is rapidly quenched and then isothermally treated at around 640 ° C, α → α_1 + α_2 Α_1 is a ferromagnetic phase rich in FeCo, α_2 is a weak magnetic phase rich in FeCr, and the two phases are alternately arranged to form an "amplitude modulation junction