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采用悬浮铸造法将硼铁颗粒加入Q235钢中制备FeB-Q235复合材料,并加入Ti进行对比,对铸态及热处理态下硼铁颗粒与基体的界面结合区进行形貌观察。研究表明,硼铁颗粒与基体界面的结合靠硼铁颗粒局部熔化后重新析出的Fe2B相形成的过渡层,而Ti的加入对Fe2B相的形成有抑制作用;在880℃正火处理后,硼铁颗粒与基体的结合处Fe2B相减少。
Ferrosilicon particles were added to Q235 steel by suspension casting to prepare FeB-Q235 composites, and Ti was added for comparison. Morphology of the interface between the boro-iron particles and matrix was observed under as-cast and heat-treated conditions. The results show that the combination of Fe-B phase and the interface between Fe-B particles and Fe-B phase is formed by the remelting of Fe2B phase after the local melting of Fe-B particles, while the addition of Ti inhibits the formation of Fe2B phase. After normalizing at 880 ℃, Iron particles and the matrix Fe2B junction reduction.