The Experts below are selected from a list of 219 Experts worldwide ranked by ideXlab platform
Muammer Nalbant - One of the best experts on this subject based on the ideXlab platform.
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a review of cryogenic cooling in machining processes
International Journal of Machine Tools & Manufacture, 2008Co-Authors: Yakup Yildiz, Muammer NalbantAbstract:The cooling applications in machining operations play a very important role and many operations cannot be carried out efficiently without cooling. Application of a coolant in a cutting process can Increase Tool Life and dimensional accuracy, decrease cutting temperatures, surface roughness and the amount of power consumed in a metal cutting process and thus improve the productivity. In this review, liquid nitrogen, as a cryogenic coolant, was investigated in detail in terms of application methods in material removal operations and its effects on cutting Tool and workpiece material properties, cutting temperature, Tool wear/Life, surface roughness and dimensional deviation, friction and cutting forces. As a result, cryogenic cooling has been determined as one of the most favourable method for material cutting operations due to being capable of considerable improvement in Tool Life and surface finish through reduction in Tool wear through control of machining temperature desirably at the cutting zone.
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A review of cryogenic cooling in machining processes
International Journal of Machine Tools and Manufacture, 2008Co-Authors: Yakup Yildiz, Muammer NalbantAbstract:The cooling applications in machining operations play a very important role and many operations cannot be carried out efficiently without cooling. Application of a coolant in a cutting process can Increase Tool Life and dimensional accuracy, decrease cutting temperatures, surface roughness and the amount of power consumed in a metal cutting process and thus improve the productivity. In this review, liquid nitrogen, as a cryogenic coolant, was investigated in detail in terms of application methods in material removal operations and its effects on cutting Tool and workpiece material properties, cutting temperature, Tool wear/Life, surface roughness and dimensional deviation, friction and cutting forces. As a result, cryogenic cooling has been determined as one of the most favourable method for material cutting operations due to being capable of considerable improvement in Tool Life and surface finish through reduction in Tool wear through control of machining temperature desirably at the cutting zone. © 2008 Elsevier Ltd. All rights reserved.
E. Bouzakis - One of the best experts on this subject based on the ideXlab platform.
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Qualification of Coatings to Predict Wear Behavior of Micro Blasted Cutting Tools
Key Engineering Materials, 2010Co-Authors: Fritz Klocke, Arne Stuckenberg, Christof Gorgels, E. BouzakisAbstract:In today’s production engineering nearly every cutting Tool is coated. In the field of coating technology and Tool treatment blasting is a common way to Increase Tool Life or hold it on a constant level for several reconditioning steps. The latest innovation referring blasting are micro blasted coatings. For this technology a parameter variation was examined and the consequential Tool Life was compared with common testing method for Tool systems in order to qualify the coating treatment. The investigations were carried out using an aluminum and zirconium oxide as blasting abrasive and by varying the blasting parameters pressure and duration. Finally, the treatment led to an optimized Tool wear behavior due to micro blasting of the coating and the wear behavior could be referenced against the testing methods.
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Qualification of Coatings to Predict Wear Behavior of Micro Blasted Cutting Tools
Key Engineering Materials, 2010Co-Authors: Fritz Klocke, Arne Stuckenberg, Christof Gorgels, E. BouzakisAbstract:In today's production engineering nearly every cutting Tool is coated. In the field of coating technology and Tool treatment blasting is a common way to Increase Tool Life or hold it on a constant level for several reconditioning steps. The latest innovation referring blasting are micro blasted coatings. For this technology a parameter variation was examined and the consequential Tool Life was compared with common testing method for Tool systems in order to qualify the coating treatment. The investigations were carried out using an aluminum and zirconium oxide as blasting abrasive and by varying the blasting parameters pressure and duration. Finally, the treatment led to an optimized Tool wear behavior due to micro blasting of the coating and the wear behavior could be referenced against the testing methods. © (2010) Trans Tech Publications.
U Engel - One of the best experts on this subject based on the ideXlab platform.
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Tool Life enhancement in cold forging by locally optimized surfaces
Journal of Materials Processing Technology, 2008Co-Authors: K Wagner, R Volkl, U EngelAbstract:Cold forging Tools are exposed to extremely high loads. Depending on the most critical combination of the dominant factors characterizing the load which can be different even within the same Tool, different damaging mechanisms will be initiated at least one of which is finally limiting Tool Life by either wear or fatigue. Since these failure mechanisms are mostly initiated on the Tool surface, the adjustment of surface properties to the local effective load combination might improve Tool performance and Increase Tool Life. In this paper, three different methods are being investigated: hard roller burnishing, surface heat treatment by laser and laser surface texturing. The determination of the Tool load is precondition for the selection of the appropriate surface treatment method. Thus, to find out which of the three methods can be used for Tool surfaces in selected case studies, process simulation by finite-element-analysis (FEA) becomes mandatory. Accordingly, FEA is used to select the optimum surface treatment, which is then applied and tested in industrial applications.
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improvement of Tool Life in cold forging by locally optimized surfaces
Journal of Materials Processing Technology, 2006Co-Authors: K Wagner, A Putz, U EngelAbstract:Abstract Cold forging Tools are exposed to extremely high loads. Depending on the most critical combination of the dominant factors characterizing the load which can be different even within the same Tool, different damaging mechanisms will be initiated at least one of which is finally limiting Tool Life by either wear or fatigue. Since these failure mechanisms are mostly initiated on the Tool surface the adjustment of surface properties to the local effective load combination might improve Tool performance and Increase Tool Life. In this paper, three different methods are being investigated: hard roller burnishing, laser beam treating and surface texturing. The determination of the Tool load is a precondition for the selection of the appropriate surface treatment method. Thus, to find out which of the three methods can be used for Tool surfaces in selected case studies, process simulation by finite-element-analysis becomes mandatory. Accordingly, FEA is used to select the optimum surface treatment which is then applied and tested in industrial applications.
Bing Wang - One of the best experts on this subject based on the ideXlab platform.
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modification of surface morphology to enhance tribological properties for cvd coated cutting Tools through wet micro blasting post process
Ceramics International, 2018Co-Authors: Bing WangAbstract:Abstract Coated cemented carbide Tools have been widely applied in high performance machining due to their excellent heat resistance and anti-wear properties. However, as-deposited Tool coatings are still challenged by the growing requirements to further enhance cutting performance. Wet micro-blasting post-process on coating Tools has been proposed to improve mechanical properties and Increase Tool Life. This paper aims to optimize the wet micro-blasting operating parameters for chemical vapor deposition (CVD) coated Tools to strengthen their wear resistance. The surface morphology of three types of CVD coated Tools including TiN/Al2O3/TiCN, thin Al2O3/TiCN and thick Al2O3/TiCN are inspected with EDS, SEM and AFM. Tribological properties for both as-deposited and wet micro-blasted Tool coatings were evaluated by dry reciprocating sliding tests. The measured results indicate that the wet micro-blasting process can significantly decrease the surface roughness and improve the wear resistance. Among the wet micro-blasting operating parameters, the wet micro-blasting time and the abrasive particle size are found to play more important roles in the formatting of top surface morphology and the enhancement of the tribological behavior than the role played by blasting pressure. Based on the research results, the CVD Tool coatings with improved anti-wear properties and surface topography can be fabricated with suitable wet micro-blasting process parameters.
Weiguang Zhu - One of the best experts on this subject based on the ideXlab platform.
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TiN coating of Tool steels: a review
Journal of Materials Processing Tech., 1993Co-Authors: Shanyong Zhang, Weiguang ZhuAbstract:Titanium nitride (TiN) has been used in the coating of Tool steels since the mid-sixties. The reasons to coat cutting Tools in a production situation are to Increase Tool Life, to improve the surface quality of the product, and to Increase the production rate. The advantages of TiN coating include high hardness and adhesion, good ductility, excellent lubricity, high chemical stability and tough resistance to wear, corrosion and temperature. In this paper, the principles, advantages and limitations of various TiN coating processes are summarized, the microstructures and mechanical properties of TiN coatings on Tool steel substrates are reviewed and new developments in the property design of TiN coatings are presented. It is concluded that TiN coating of Tool steels is a proven way of success in boosting production and curtailing cost. For HSS applications, however, PVD processes are more appropriate than CVD processes although PVD has its own limitations, which need to be addressed in research into and the development of coating processes in the future. With the growing popularity of TiN-coated Tools and new development of coating process, and thus better property control, the market of TiN-coated Tool steels promises a prosperous future. © 1993.
