【摘要】 对Fe-Cr-Co永磁合金经激光辐照后的磁性能、微观组织结构变化进行了研究和分析。结果表明,当激光功率为3000 W时,随扫描速度的减慢,合金磁性能下降幅度增大,当扫描速度为600 mm/min时试样接近退磁状态。激光辐照后试样表层的薄区中发生了α→γ相变。激光辐照的作用机制主要是热效应和少量的冲击力学效应以及相变引起的相变区和非相变区间的应力集中。更多还原

【Abstract】 The magnetic properties and microstructures of Fe-Cr-Co permanent magnetic alloy after laser irradiation were investigated.The results show that the magnetic properties decrease dramatically with the increase of scanning velocity,and the sample appears to be demagnetized when the scanning velocity is 600 mm/min.The α→γ phase transformation occurs in the very thin surface layer after laser irradiation.The main effects of laser irradiation are heat effect,dynamic impact effect as well as the stress concentration between the new-phase and the matrix.更多还原