Surface hardening in finishing of sintered and thermal sprayed X120Mn12

Finishing of sprayed coatings is required for applications in tribological systems. The mostly hard and wear-resistant coatings cause increased tool wear in machining. Functional coating materials with hardening capacity during machining represent an alternative approach that reduces tool wear and e...

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Bibliographic Details
Published in:Procedia CIRP 2022, Vol.108, p.216-221
Main Authors: Liborius, Hendrik, Lindner, Thomas, Nestler, Andreas, Uhlig, Thomas, Lampke, Thomas, Wagner, Guntram, Schubert, Andreas
Format: Article
Language:English
Subjects:
Coating
Diamond smoothing
Hardening
Machining
Tool geometry
Tribology
Turning
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Summary:Finishing of sprayed coatings is required for applications in tribological systems. The mostly hard and wear-resistant coatings cause increased tool wear in machining. Functional coating materials with hardening capacity during machining represent an alternative approach that reduces tool wear and ensures sufficient wear resistance. The research objective is to analyze the hardening potentials of coatings while machining. For the investigations specimens of the steel X120Mn12 are manufactured by spark-plasma sintering and thermal spraying, respectively. Finishing is performed by face turning using tools characterized by different rake angles and by diamond smoothing under varying smoothing force. The geometrical properties and the hardness of the surface are determined. After tribological tests the specimens wear depth is measured. The tool rake angle and the smoothing force affect the surface hardness and the depth of the hardened layer. Additionally, specimens manufacturing process influences the resulting surface properties and the wear resistance. Purposive hardening of coatings by finishing is analyzed for the first time. The results enhance the knowledge about machining of coatings and contribute to an enlargement of their field of application.
ISSN:2212-8271
2212-8271
DOI:10.1016/j.procir.2022.03.038