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The Controlled Compound Layer of Ni-Coated Nitrided Pure Iron

机译:Ni涂层氮化纯铁的受控复合层

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摘要

In order not to sacrifice nitrided layer thickness and reduce brittle compound layer thickness, Ni-coated pretreatment was carried out with electrodeposition on a pure iron surface, followed by gas nitriding. The brittle compound layer thickness of duplex surface treated samples was reduced, and the nitrided layer thickness increased to 320 μm. The microhardness was 4 times harder, and the wear loss was reduced by 68% compared with the original material. The results indicate that Ni-coated pretreatment could effectively improve microhardness and wear resistance and realize the controlled microstructure of a brittle compound layer of pure iron without compromising nitrided layer thickness. Ni coating plays an important role in ammonia adsorption and decomposition, and in the transfer of active nitrogen atoms during nitriding.
机译:为了不牺牲氮化层厚度并减少脆化合物层厚度,用电沉积在纯铁表面上进行Ni涂覆的预处理,然后进行气体氮化。双相处理样品的脆化合物层厚度降低,氮化层厚度增加到320μm。微硬度与原始材料相比,磨损损耗减少了68%。结果表明,Ni涂覆的预处理可以有效改善微硬度和耐磨性,并实现纯铁的脆性化合物层的控制微观结构,而不会损害氮化层厚度。 Ni涂层在氨吸附和分解中起重要作用,并且在氮化期间在活性氮原子的转移中作用。

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