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首页> 外文会议>Conference of the European Scientific Association on material forming;ESAFORM 2012 >Amorphous Carbon Coatings for Locally Adjusted Tribological Properties in Sheet Bulk Metal Forming
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Amorphous Carbon Coatings for Locally Adjusted Tribological Properties in Sheet Bulk Metal Forming

机译：块状金属成形中用于局部调节摩擦学性能的无定形碳涂层

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摘要

In sheet bulk metal forming, locally adapted friction properties of the contact tooL/workpiece are an appropriate means for the targeted enhancement of the material flow, enabling an improved form filling and lowered forming forces. However, the implementation of desirable friction conditions is not trivial. And further, friction is inseparably linked to wear and damage of the contacting surfaces. This calls for a methodological approach in order to consider tribology as a whole already in the early phases of process layout, so that tribological measures which allow fulfilling the requirements concerning local friction and wear properties of the tool surfaces, can already be selected during the conceptual design of the forming tools. Thin tribological coatings are an effective way of improving the friction and wear properties of functional surfaces. Metal-modified amorphous carbon coatings, which are still rather new to the field of metal forming, allow tackling friction and wear simultaneously. Unlike many other types of amorphous carbon, they have the mechanical toughness to be used in sheet bulk metal forming, and at the same time their friction properties can be varied over wide ranges by proper choice of the deposition parameters. Based on concrete research results, the mechanical, structural and special tribological properties of tungsten-modified hydrogenated amorphous carbon coatings (a-C:H:W) are presented and discussed against the background of the tribological requirements of a typical sheet bulk metal forming process.
机译：在金属薄板成形中，触头/工件的局部适应摩擦性能是用于有针对性地提高材料流动性的合适方法，从而可以改善成型填充并降低成形力。但是，实现理想的摩擦条件并非易事。而且，摩擦与接触表面的磨损和损坏密不可分。这就要求采取一种方法论方法，以便在工艺布局的早期阶段就将摩擦学作为一个整体来考虑，以便在概念设计过程中就已经可以选择能够满足有关工具表面局部摩擦和磨损性能要求的摩擦学措施。成型工具的设计。薄的摩擦涂层是改善功能表面摩擦和磨损性能的有效方法。金属改性的无定形碳涂层在金属成型领域仍是相当新的，它可以同时解决摩擦和磨损问题。与许多其它类型的无定形碳的，它们具有在片本体金属成形中使用的机械韧性，并在同一时间它们的摩擦性质可在宽范围内通过沉积参数的适当选择而变化。根据具体的研究结果，在典型的板材散装金属成形工艺的摩擦学要求背景下，介绍并讨论了钨改性的氢化无定形碳涂层（a-C：H：W）的机械，结构和特殊的摩擦学性能。

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