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SEM观察表明,含有μ相的Fe-Mo二元合金发生高温硫化时,μ相晶粒周围的硫化产物层结构随着这种相在合金中的含量变化而变化。在该相含量少的低钼合金中,孤立的μ相晶核的硫化产物为成分交替变化的多层结构;以μ相为主的Fe-Mo合金表面则生成简单的双层结构。通过分析合金组织结构、产物层结构以及硫化传质扩散之间的关系,解释了实验结果。
The SEM observation shows that the structure of the vulcanized product layer around the μ phase grains changes with the content of this phase in the alloy when high temperature vulcanization occurs in the Fe-Mo binary alloy containing μ phase. In the low-molybdenum alloy with low content of phase, the isolated product of the phase-μ-phase nucleus is a multilayered structure whose composition changes alternately. The surface of Fe-Mo alloy with μ-phase mainly produces a simple two-layer structure. The experimental results are explained by analyzing the relationship between the microstructure of the alloy, the structure of the product layer and the diffusion of sulfidation mass transfer.