Abstract
Metallographic analysis of the magnet material made from the Fe-Al-Ni-Co made it possible to determine that melt excessive overheating before casting reduced the product target characteristics due to formation of various internal defects. Inaccessibility was shown of high microchemical inhomogeneity and internal stresses that led to formation of cracks in the casting material and destruction of the columnar grains deteriorating the finished magnets performance.
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