It is expected that this technology will be capable of not only generating the coatings technically necessary to combat mechanisms of identified wear, but also of competing with the thermal projection processes in current use as regards cost, reliability and industrial accessibility.
Taking part in the project, set to last three years, is the National Centre for Scientific Research (CNRS) of the University of Limoges in France and Javikan, Arain and Mecanizados Kanter companies from the Basque Country, together with the other European companies, PyroGenesis (Greece) and BPE International Dr. Hornig GmbH (Germany).
Two-stroke diesel engines are recognised to be the most economic and reliable for ocean-going cargo ships. However, the aim of reducing maintenance requirements and enhancing reliability during operation is basic in competitiveness in the marine industry and maritime trading.
The components of this engine subjected to checks in order to increase their useful life are numerous: those of the exhaust gases exit system, the cylinder casing, the piston head, the segments and the piston rod, amongst others. The exhaust system is a substantial part of the cost of the engine given that, under the extreme conditions of corrosion and temperature, advanced high-cost materials have to be employed.
The manufacturing of exhaust valves, for example, requires materials capable of resisting both extreme conditions of erosion and adhesion of corrosive deposits, as well as the high pressures of the system. The most appropriate material for this type of valve is a Nimonic alloy, although for standard valves, steels resistant to high temperatures and with local hardening at the valve seat are still preferred.
The cost of these materials and the need to optimise the checking and maintenance intervals have given rise to developing effective maintenance and reconditioning procedures for valve components.
The usual procedures involve refilling with estelite through welding at the valve seats and the use of ceramometallic coatings applied at the valve axle using a HVOF (High Velocity Oxy-Fuel) thermal projection technique. While these techniques are included in the specifications of many of the most advanced equipment manufacturers and maintenance companies, their more general use in the manufacture of these components is limited technically and financially.
The practical targets of the project focus on the following technological aims* Reduce (in the proportion of two or three times) the maintenance requirements for critical components in marine diesel engines:
* Manufacturing diesel engine components using OFI technology.
Irati Kortabitarte | alfa
PRESTO – Highly Dynamic Powerhouses
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Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...
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