Temperature measurement with thin film sensors during warm forging of steel
Temperature measurement with thin film sensors during warm forging of steel
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DOI：
10.1007/s00542-020-05179-9
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发表时间：
2021-01-24
影响因子：
2.1
通讯作者：
Braeuer, G.
中科院分区：
文献类型：
--
作者：
Plogmeyer, M.;Kruse, J.;Braeuer, G.
与热锻件相比，温锻件具有更好的表面性能和更高的尺寸精度。类金刚石(DLC)涂层可用作耐磨保护涂层，具有抗粘附性和极高硬度(高达3500 HV)，以提高刀具的使用寿命。在汉诺威IPH毛皮综合生产研究所和布伦瑞格工业大学表面技术研究所(IOT)与弗劳恩霍夫表面工程和薄膜研究所(IST)合作的研究项目的第一个资助期内，研究了不同涂层类型和工艺温度对刀具磨损的影响。结果表明，DLC涂层在某些情况下可以显著降低刀具磨损，但其使用寿命强烈依赖于温度。由于附着力的挑战，当时无法实现涂层集成温度测量。在第二个资助期，研究了多层类金刚石涂层对刀具磨损的影响。此外，还开发了一种利用薄膜传感器测量雕刻表面温度的方法，以将局部工艺温度与局部层磨损联系起来。在这项工作中，介绍了薄膜温度传感器的发展和收集的结果，使温度测量比通常使用的热电偶更准确。研究了它们在高载荷下的功能和耐久性，表明它们是有前途的。
Warm forged components have better surface properties and higher dimensional accuracy than hot forged components. Diamond-like-carbon (DLC) coatings can be used as wear protection coatings, which are anti-adhesive and extremely hard (up to 3500 HV), to increase tool service life. In the first funding period of the research project at the IPH - Institut fur Integrierte Produktion Hannover gGmbH and the Institute for Surface Technology (IOT) of the Technical University of Braunschweig in cooperation with the Fraunhofer Institute for Surface Engineering and Thin Films (IST), the influence of different coating types and process temperatures on tool wear was investigated. The result is, that DLC coatings can reduce tool wear in some cases significantly, but that their service life is strongly dependent on the temperature. Coating-integrated temperature measurement could not be realised at that point, due to adhesion challenges. During the second funding period, the effect of multilayer DLC coatings on tool wear was investigated. Also, an additional method of the temperature measurement on the engraving surface using thin film sensors was developed in order to correlate the local process temperature and local layer wear. In this work, the development of and the results gathered by the thin film temperature sensors are presented, which enable for more accurate temperature measurements than commonly used thermocouples. Their functionality and durability under high loads were investigated and showed to be promising.