文章利用中频感应炉炼制2种锰含量不同的硫化物自润滑合金，通过SEM观察断口并结合组织分析，研究合金中的硫化物形成以及合金的断裂行为。结果表明，硫化物处于韧性较差的珠光体中导致形成脆性解理断口，而硫化物处于韧性较好的铁素体中则形成韧性的韧窝断口。锰含量较低时硫化物以FeS为主，且为复相组织；含坚硬的V、Nb、Ti小颗粒化合物，易脱落；锰含量较高时硫化物以MnS为主。
Selflubrication alloys containing sulphide with different contents of manganese were prepared by a induction melting and casting process. The formation of sulfide in these alloys and their fracture were researched both with a scanning electron microscope and microstructure analysis. The results show that the fracture surface is in form of brittle cleavage fracture when sulfides locate in pearlite with a low toughness, and the fracture surface is in form of ductile dimple fracture when sulfides locate in ferrite with a high toughness. The sulfides mainly include FeS and present as a composite phase containing some small hard particles of V, Nb, Ti sulfides for the alloy with a lower content of manganese, whereas the sulfides mainly comprise MnS for the alloy with a high content of manganese.
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