Increasing the Efficiency of Forging Operations Using Adjusted Tribological Surfaces Enhanced by Hard Coatings
Increasing the Efficiency of Forging Operations Using Adjusted Tribological Surfaces Enhanced by Hard Coatings
复制标题
使用硬质涂层增强的调整摩擦学表面提高锻造操作的效率
DOI：
10.2474/trol.11.432
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发表时间：
2016
期刊：
影响因子：
1
通讯作者：
L. Lippold
中科院分区：
文献类型：
--
作者：
B. Behrens;A. Bouguecha;A. Huskic;Markus Baumer;H. Paschke;L. Lippold
热锻作业中使用的工具在加工过程中由于高温和机械载荷的复杂载荷条件而遭受高磨损。由此导致的模具使用寿命缩短严重限制了生产过程的成本效益。研究表明，在多次锻造循环过程中，刀具形貌对磨损的形成有明显的影响。因此，为了减少摩擦学引起的磨损，增强形貌有望增加耐磨性。在这项研究中，要确定锻模的适当表面结构。为此，采用车削、铣削和爆破等有效的生产方法来产生与地形结构有关的独特模具表面。通过研究磨损表面，考虑abbot - firestone图的形貌参数，可以确定最优的表面结构。由于热锻造过程中的高机械和热负荷导致独特的地形变化，因此必须对所创建的地形进行机械稳定。因此，采用等离子体渗氮和PECVD涂层技术制备的硬质涂层进行了等离子体双相处理。它可以显示，锻造模具的创建的地形是可持续的在大量的锻造循环，从而导致减少磨损。
Tools used in hot forging operations are subjected to high wear during processing due to complex load conditions with high temperatures and mechanical loads. The resulting abridged service lifetime of the dies highly restricts the cost-effectiveness of the production process. Several investigations indicate that the condition of the tool topography during several forging cycles affects the formation of wear distinctly. Thus, an enhancement of the topography in order to reduce tribologically caused wear is expected to increase wear resistance. Within this investigation an appropriate surface structure of forging dies is to be defined. For this purpose, efficient production methods like turning, milling and blasting are applied to generate distinguished die surfaces concerning topographical structures. By investigating the worn-out surfaces, the optimal surface structure can be determined, taking into account topography parameters deduced from the Abbott-Firestone graph. A mechanical stabilization of the created topography is necessary due to the high mechanical and thermal loads during hot forging leading to distinctive topography alterations. Thus, plasma duplex treatments were carried out, consisting of plasma nitriding and hard coatings produced by PECVD coating technique. It can be shown, that the created topography of the forging dies is sustainable over high amounts of forging cycles and thus leads to a reduction of wear.