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首页> 外文期刊>Journal of Manufacturing Processes >Tribological studies on multi-coated forming tools
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Tribological studies on multi-coated forming tools

机译：多涂层成型工具的摩擦学研究

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Processes of Sheet-Bulk Metal Forming combine operations of both sheet and bulk metal forming, enabling the production of closely-toleranced functional components. Locally differing friction conditions on a single tool surface are crucial to control the material flow and to reduce process forces and tool wear. In order to understand how different friction conditions on a multi-coated tool surface affect the material flow during forming operations, variants of amorphous carbon coatings (a-C:H:W) and Cr-based hard coatings (CrAlN, CrAlCN) were deposited in combinations side by side on punches of ring compression tests. Evaluating the rings' shapes revealed the coatings' effects on material flow in terms of ring inner contours with sections of varying curvatures. Characteristic friction mechanisms were observed, which allowed a local delimitation of friction conditions by selectively applied coatings.
机译：钣金成形工艺结合了钣金成形和钣金成形的操作，从而可以生产公差严格的功能部件。单个工具表面上局部不同的摩擦条件对于控制物料流并减少加工力和工具磨损至关重要。为了了解多层涂层工具表面上的不同摩擦条件如何影响成型操作期间的材料流动，将无定形碳涂层（aC：H：W）和基于Cr的硬质涂层（CrAlN，CrAlCN）组合在一起沉积并排进行环形压缩测试。通过对环的形状进行评估，可以发现涂层对材料流动的影响，其环内部轮廓具有不同的曲率。观察到了特征性的摩擦机理，该机理允许通过选择性地施加涂层来局部限定摩擦条件。

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