【摘要】 本文研究了不同硼含量下FeCrMoSiB单辊急冷带及950℃退火带的显微组织及硬度和脆性。发现在B≤17％范围内,硼含量的增加提高非晶形成能力及抗晶化能力,但同时也增加其脆化倾向,非晶内部存在成分与结构的不均匀性。当B=20％时,非晶形成能力急剧下降,生成与（Cr,Fe）₂B结构相近的亚稳相。退火带由硼化物与α-Fe晶粒组成。硼化物有M₃B₂和（Cr,Fe）₂B两种,其中（Cr,Fe）₂B数量随硼含量线性增加而M₃B₂数量基本不变。更多还原

【Abstract】 The influence of B content on the microstructure as well asthe hardness and brittleness of FeCrMoSiB alloys both in single-roll quenched state and in 950℃ annealed state has deen studied. It is found that when B<17 %, the increase of B content will enhance the amorphous forming ability and the resistance to crystallization while obviously cause increasing embrittlement. The structure and composition in amorphous state is inhomo-geneous. When B=20 % the amorphous forming ability decreases sharply and a metastable phase similar to (Cr, Fe),B in crystal structure is formed during quenching. Anealed ribbons are composed of submicron grains of boride and α-Fe. The boride comprises two kinds: M3B2 and (Cr,Fe)2B. The latter increases linearly while the former remains nearly constant with the increase in B content.更多还原