A5048658065- Advanced machining processes and optimization
- Advanced Surface Polishing Techniques
- Advanced Machining and Optimization Techniques
- Metal Alloys Wear and Properties
- Laser Material Processing Techniques
- Materials Engineering and Processing
- Education, Psychology, and Social Research
- Engineering Technology and Methodologies
Leibniz-Institut für Werkstofforientierte Technologien - IWT
2014-2018
University of Bremen
2015-2018
Institute of Materials Science
2014
This paper discusses a physical based method to determine limits with regard the thermal impact of grinding processes on machined workpiece surface layer. The can be identified by analyzing specific power Pc" and contact time Δt between wheel workpiece. approach will exemplarily applied regimes during which intended phase transformations grind-hardening undesired burn shallow-cut are generated. Theoretical analyses Malkin's burning limit show that it also expressed as function double...
This paper discusses results acquired during surface grinding experiments performed on hardened steel workpieces. The experimental show different zones of thermally induced material modifications depending the contact time Δt and maximum zone temperature Tmax. In particular it was observed that rehardened occurred within two separated ranges temperatures times. Further analyses revealed these correspond to significantly mechanical loads as well varying retained austenite rates. shall help...
Abstract This paper focuses on the correlation between process quantities of an external cylindrical grinding (heat partition factor ɛ , specific energy u w transported to workpiece, power P c ″ ) and resulting surface subsurface properties ground workpiece. In order identify this correlation, experimental investigations were carried out maximum contact zone temperature T max was measured by using a wheel-integrated measurement system. The layer are linked with means regression analysis...
This paper presents a diagram of maximum contact zone temperature T max versus time Δt , based on the analysis workpiece surface layer properties after cylindrical grinding experiments. Apart from resulting properties, process quantities ( normal and tangential forces F n t ) are investigated with reference to state as well. Ground workpieces analyzed by performing Barkhausen noise level measurements together subsequent metallographic X-ray diffraction investigations. By mapping...