Fe-based amorphous alloys are characteristic of high saturation magnetization, low coercivity, and low core loss, which holds a grand promise for several engineering applications, such as soft magnetic, corrosion-resistant and wear-resistant coatings. However, poor amorphous forming ability (AFA) and size limit remain the main obstacles in applications. This study aims to address those scientific-technical challenges through a twin-roll strip casting method to yield two cost-effective Fe-based amorphous alloy (Fe₇₃Mo₄B₅Si₅P₈C₅ and Fe₈₀Al₂B₅P₉C₄) ribbons with ca. 200-μm thickness and promising soft magnetic functions. Their crystallization behavior, thermal stability, magnetic properties, and mechanical performance for melt-spun and annealed alloys were studied systematically. Results demonstrate that Fe₇₃Mo₄B₅Si₅P₈C₅ and Fe₈₀Al₂B₅P₉C₄ present good thermal stability, a large temperature interval between T_g and T_x1(61.7 °C for Fe₇₃Mo₄B₅Si₅P₈C₅ and 43.1 °C for Fe₈₀Al₂B₅P₉C₄) infers that both the alloys have good processability. Meanwhile, Fe₈₀Al₂B₅P₉C₄ amorphous alloy subjected to annealing at 450 °C for 300 s exhibited high saturation magnetization greater than 1.5 T, low coercivity of 5.3 A/m and high hardness of 989 Hv, which were attributed to the utterly amorphous structure and superior thermal stability achieved by twin-roll strip casting. Integrating the favorable mechanical, magnetic characteristics and high manufacturability of ultra-thick Fe₇₃Mo₄B₅Si₅P₈C₅ and Fe₈₀Al₂B₅P₉C₄ amorphous alloys indicates that twin-roll strip casting is a sound solution to tackle the poor AFA and size limit in production of amorphous ribbons.

铁基非晶态合金具有高饱和磁化强度，低矫顽力和低铁损的特点，在软磁，耐腐蚀和耐磨涂层等多种工程应用中具有广阔的前景。然而，不良的非晶形成能力（AFA）和尺寸限制仍然是应用中的主要障碍。这项研究旨在通过双辊薄带连铸方法解决这些科学技术挑战，以生产出两种具有成本效益的铁基非晶合金（Fe ₇₃ Mo ₄ B ₅ Si ₅ P ₈ C ₅和Fe ₈₀ Al ₂ B ₅ P ₉ C ₄）丝带约 200μm的厚度和有希望的软磁功能。系统地研究了它们在熔纺和退火合金中的结晶行为，热稳定性，磁性能和机械性能。结果表明，Fe ₇₃ Mo ₄ B ₅ Si ₅ P ₈ C ₅和Fe ₈₀ Al ₂ B ₅ P ₉ C ₄具有良好的热稳定性，T _g和T _x1之间的温度间隔较大（Fe ₇₃ Mo ₄为61.7°C乙Fe ₈₀ Al ₂ B ₅ P ₉ C _4的5 Si ₅ P ₈ C ₅和43.1°C推断这两种合金都具有良好的加工性能。同时，Fe ₈₀ Al ₂ B ₅ P ₉ C ₄在450°C退火300 s的非晶态合金表现出大于1.5 T的高饱和磁化强度，5.3 A / m的低矫顽力和989 Hv的高硬度，这归因于完全的非晶态结构和通过双晶获得的优异的热稳定性。辊带钢铸造。集成了超厚的Fe ₇₃ Mo ₄ B ₅ Si ₅ P ₈ C ₅和Fe ₈₀ Al ₂ B ₅ P ₉ C ₄的良好的机械，磁特性和高可制造性 非晶态合金表明，双辊薄带连铸是解决非晶态薄带生产中不良的AFA和尺寸限制的良好解决方案。