Abstract Hybrid systems consisting of nitriding by die-sinking electrical discharge machining and subsequent titanium aluminum nitride (TiAlN) coating were produced on annealed AISI H13 steel aiming to study the conjugate friction and wear behavior for tribological applications. In this emerging nitriding process, urea [(NH2)2CO] was added to deionized water and used as dielectric fluid. The wear resistance and coefficient of friction of the produced systems were investigated against tungsten carbide (WC-12Co) pins. The sliding wear resistance of the hybrid systems produced by the new method were improved by fivefold compared to the only nitrided substrate. This behavior can be explained by the significant increase in hardness (fourfold compared to the nitrided substrate) and by reduction of the coefficient of friction. This can be attributed to the formation of new phases (Fe11N, TiN and TiO) and to the increased load bearing ability provided by the nitrided substrate. By EDM machining and simultaneously nitriding the work material in the as received state, it is possible to contribute to the productivity in the manufacture of dies and at the same time achieve the desired results, such as improving the wear resistance of the tool.

中文翻译：

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AISI H13钢通过电火花加工和TiAlN涂层进行表面改性：一种提高耐磨性的有前途的混合技术

摘要 为了研究摩擦学应用中的共轭摩擦和磨损行为，在退火的 AISI H13 钢上生产了由电火花加工渗氮和随后的氮化钛铝 (TiAlN) 涂层组成的混合系统。在这个新兴的氮化工艺中，尿素 [(NH2)2CO] 被添加到去离子水中并用作介电流体。针对碳化钨 (WC-12Co) 销研究了生产系统的耐磨性和摩擦系数。与唯一的氮化基材相比，由新方法生产的混合系统的滑动耐磨性提高了五倍。这种行为可以通过硬度的显着增加（与氮化基材相比的四倍）和摩擦系数的降低来解释。这可归因于新相（Fe11N、TiN 和 TiO）的形成以及氮化基材提供的承载能力增加。通过 EDM 加工并同时对处于接收状态的工件材料进行氮化，可以提高模具制造的生产率，同时实现所需的结果，例如提高刀具的耐磨性。