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首页> 外文期刊>Journal of Materials Engineering and Performance >Sulfide Transformation from Self-Lubricating to Free-Cutting in Powder Metallurgy Iron-Based Alloys
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Sulfide Transformation from Self-Lubricating to Free-Cutting in Powder Metallurgy Iron-Based Alloys

机译：硫化物转化从自润滑对粉末冶金铁基合金的自由切割

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In this study, the effects of sulfide transformation on mechanical properties and microstructure in Fe-Cu-C alloys were investigated. Taking advantages of self-lubricating and free-cutting of different sulfides, the sulfide transition in iron-based alloys mainly included two parts. Firstly, a thin layer of FeS film was coated on the iron powder surface during annealing, acting as solid lubricant to reduce the compaction friction. Then, in situ MnS with particle size of 1-2 mu m was formed followed by the reaction of FeS and Mn during sintering. Consequently, the sintered density reached to 7.34 g/cm(3) and the machinability significantly improved with less tool wear. Besides, the mechanical performance was also enhanced. The hardness increased from 80.5 HRB to 84.1 HRB, and the tensile strength increased from 590 to 631 MPa. The MnS phase was mainly distributed along the grain boundaries.
机译：在该研究中，研究了硫化物转化对Fe-Cu-C合金中力学性能和微观结构的影响。 采用自润滑和自由切割的不同硫化物的优点，铁基合金中的硫化物过渡主要包括两部分。 首先，在退火期间涂覆在铁粉表面上的薄层薄膜，用作固体润滑剂以减少压实摩擦。 然后，形成具有1-2μm的粒径为1-2μm的原位MN，然后在烧结期间FES和Mn的反应。 因此，烧结密度达到7.34g / cm（3），并且通过较少的工具磨损，可加工性显着提高。 此外，机械性能也增强了。 硬度从80.5 HRB增加到84.1HRB，拉伸强度从590增加到631MPa。 MNS相主要沿晶界分布。

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