Investigations on Joining Surface Hardened Steels by Friction Welding
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Ion Mitelea
Abstract
The particularities of joining surface hardened steels (carburized, nitrided and induction hardened) using friction welding are analyzed in order to assess the influence of the wear protection layers on the welding process. The joint influence of the friction speed, friction pressure and time, as well as the upsetting pressure is evaluated for joints made out of carburized, nitrided and carburized with nitrided steels, respectively. The investigation of microstructure and properties allows an optimization of the friction welding parameters. The friction stroke appears to be the main parameter for welding carburized and nitrided steels, respectively. For welding carburized with nitrided parts, remains of carbon and nitrogen enriched materials are still present in the joining plane, regardless of the axial pressure and the friction stroke. Only a limited diffusion of the two components in the axial direction can be detected.
Kurzfassung
Die Einzelheiten des Fügens von oberflächengehärteten Stählen (aufgekohlt, nitriert und induktionsgehärtet) durch Reibschweißen wurden analysiert, um den Einfluss der Reibschutzschichten auf den Schweißprozess zu ermitteln. Der gemeinsame Einfluss der Reibgeschwindigkeit, des Reibdruckes und der Zeit sowie des Anpressdruckes wurde für Verbindungen aus aufgekohlten nitrierten und carbo-nitrierten Stählen analysiert. Die Untersuchung der Mikrostruktur und der Eigenschaften erlaubt eine Optimierung der Reibparameter. Die Reibtiefe erschien als der wichtigste Parameter beim Schweißen von aufgekohlten und nitierten Stählen. Beim Schweißen von carbo-nitrierten Stählen verblieben Kohlenstoff- und Stickstoff-angereicherte Bereiche des Werkstoffes noch in der Fügeebene, unabhängig vom axialer Druck und von der Reibtiefe. Nur eine begrenzte Diffusion dieser beiden Komponenten in axialer Richtung konnte beobachtet werden.
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© 2011, Carl Hanser Verlag, München
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Articles in the same Issue
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- Mechanische Charakterisierung ultraschallgeschweißter Aluminium/CFK-Verbunde bei automobilrelevanten Temperaturen und Prüfgeschwindigkeiten
- Pressure Resistance of Glass Capillaries for Hydrogen Storage
- Investigations on Joining Surface Hardened Steels by Friction Welding
- In-Situ Crack Detection Using Thermo Elastic Stimulated Lock-In Thermography
- Enhanced Grain Orientation in Pb(Zr,Ti)O3 Powder-Modified SrBi2Ta2O9 Ferroelectric Ceramics
- Effects of Binder and Water Contents on Extrusion Behavior of Zeolite
- Temperature Distribution of Multipass TIG Welded AISI 304L Stainless Steel
- The Indentation Size Effect on the Micro-Hardness of Sea Mollusc Shell Structures
- Fabrication and Characterization of SiC Preforms for Metal Matrix Composites
- Prediction of Fiber/Matrix Debonding Kinetics in Glass Fibre Reinforced Polyoximethylene under Creep
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