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为了提高Fe_(83)Ga_(17)合金的磁致伸缩性能,对铸态合金进行1100℃×1 h的均匀化处理后,再分别进行650、700、750、800和850℃×3 h退火处理。通过物相、显微组织、DSC、硬度及磁致伸缩性能分析,结果表明,Ga原子固溶进Fe晶格后,晶格常数增大;经过热处理后,晶粒内的亚晶界消失,并析出了大量的富Ga相,硬度下降;在退火温度为800℃时,<100>方向的晶粒数目增多,磁致伸缩系数达到95×10~(-6),是铸态下的3.8倍。均匀化及退火处理对Fe_(83)Ga_(17)合金的磁致伸缩性能有明显提升。
In order to improve the magnetostriction of Fe_ (83) Ga_ (17) alloy, the as-cast alloys were homogenized at 1100 ℃ for 1 h and annealed at 650, 700, 750, 800 and 850 ℃ for 3 h deal with. Through the analysis of the phase, microstructure, DSC, hardness and magnetostriction properties, the results show that the lattice constant increases when Ga atoms are dissolved into the Fe lattice. After the heat treatment, the subgrain boundaries in the crystal disappear, A large amount of Ga-rich phase was precipitated and the hardness decreased. When the annealing temperature was 800 ℃, the number of grains in the <100> direction increased and the magnetostriction coefficient reached 95 × 10 -6, which was 3.8 Times Homogenization and annealing treatment of Fe_ (83) Ga_ (17) alloy magnetostriction properties improved significantly.