利用激光熔化、基体自淬火实现快速凝固,能有效地抑制偏析而得到均匀组织。但是,我们发现固溶态Fe-10Ge合金经激光处理后反而出现大量球状第二相颗粒,其它低碳铁基合金也有类似现象。本文对此作了研究,确认这是由于铁基合金与氧形成偏晶系而出现的偏晶转变现象。试样由工业纯Fe(含C0.018%以下)和高纯10%Ge经真空电弧炉冶炼而得。连续波激光束以 The use of laser melting, rapid quenching of the matrix to achieve rapid solidification, segregation can be effectively suppressed and uniform organization. However, we found that a large amount of spherical second phase particles appeared after laser treatment in the solid solution Fe-10Ge alloy. Other similar low-carbon ferrous alloys also showed similar phenomena. This article made a study to confirm that this is due to the formation of meta-crystal iron-based alloy and oxygen partial crystal shift phenomenon. Samples from the industrial pure Fe (including C0.018%) and high purity 10% Ge by vacuum arc furnace derived. Continuous wave laser beam to