Ionic Liquids as Quenching Media for Heat Treatment of Metals

离子液体作为金属热处理淬火介质

• 批准号: 219128957
• 负责人: Professor Dr.-Ing. Olaf Keßler
• 金额: --
• 依托单位: Arbeitsgruppe Polymerphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/219128957?language=en
• 关键词: Ionic; Liquids; Quenching; Media; Heat

In the first project period, we have shown, that aluminium alloys can successfully be quenched in ionic liquids. Quenching in ionic liquids results in a rapid, but also homogeneous cooling process. The quenching rate can be increased by the addition of water, without inducing macroscopic film boiling. Further, we have shown, that ionic liquids evaporate rather than decompose during fast heating. This successful work shall be continued in four combined directions, to proceed regarding mechanisms of ionic liquid quenching, as well as selection and application of ionic liquid quenchants. The former main selection criterion of a high decomposition temperature is no longer valid. Thereby, the range of possibly suitable ionic liquids increases significantly. E.g. halogen free ionic liquids may be suitable with advantages regarding corrosion and work safety. Further, first promising quenching test of steels (annealing temperature above 800°C) have been performed in ionic liquids. This new application shall be investigated in detail. The huge potential for reducing residual stresses and distortion shall be investigated using more complex and distortion sensitive component geometries. Finally, thermogravimetric measurements shall be improved, to determine boiling temperatures of ionic liquids depending on pressure.

在第一个项目期间，我们已经证明，铝合金可以成功地在离子液体中淬火。在离子液体中淬火导致快速但均匀的冷却过程。通过加入水可以提高淬火速率，而不会引起宏观膜沸腾。此外，我们已经表明，离子液体在快速加热过程中蒸发而不是分解。这一成功的工作将在四个方向上继续进行，即离子液体淬火机理、离子液体淬火介质的选择和应用。以前的高分解温度的主要选择标准不再有效。因此，可能合适的离子液体的范围显著增加。例如，不含卤素的离子液体可以是合适的，具有关于腐蚀和工作安全的优点。此外，已经在离子液体中进行了钢的第一个有希望的淬火试验（退火温度高于800°C）。应详细调查这一新的应用。应使用更复杂和变形敏感的部件几何形状来研究减少残余应力和变形的巨大潜力。最后，应改进热重测量，以根据压力确定离子液体的沸腾温度。

项目成果

Room temperature ionic liquids in a heat treatment process for metals

金属热处理工艺中的室温离子液体

• DOI: 10.1039/c4ra06901c
• 发表时间: 2014
• 期刊: RSC Advances
• 影响因子: 3.9
• 作者: C. Schmidt;M. Beck;M. Ahrenberg;C. Schick;O. Keßler;U. Kragl
• 通讯作者: U. Kragl

Ionic Liquids as New Quenching Media for Aluminium Alloys and Steels*

离子液体作为铝合金和钢的新型淬火介质*

• DOI: 10.3139/105.110256
• 发表时间: 2015
• 期刊: HTM Journal of Heat Treatment and Materials
• 作者: M. Beck;C. Schmidt;M. Ahrenberg;C. Schick;U. Kragl;O. Kessler
• 通讯作者: O. Kessler

Reliable Absolute Vapor Pressures of Extremely Low Volatile Compounds from Fast Scanning Calorimetry

• DOI: 10.1007/978-3-319-31329-0_8
• 发表时间: 2016
• 作者: M. Ahrenberg;A. Ostonen;J. Schmelzer;Martin Beck;C. Schmidt;O. Kessler;U. Kragl;S. P. Verevkin;C. Schick