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
More functionalities: Microstructuring large surfaces with a UV-laser system
05.07.2018 | Fraunhofer-Institut für Lasertechnik ILT
A factory to go
04.07.2018 | Fraunhofer Institute for Manufacturing Engineering and Automation IPA
Thin-film solar cells made of crystalline silicon are inexpensive and achieve efficiencies of a good 14 percent. However, they could do even better if their shiny surfaces reflected less light. A team led by Prof. Christiane Becker from the Helmholtz-Zentrum Berlin (HZB) has now patented a sophisticated new solution to this problem.
"It is not enough simply to bring more light into the cell," says Christiane Becker. Such surface structures can even ultimately reduce the efficiency by...
A study in the journal Bulletin of Marine Science describes a new, blood-red species of octocoral found in Panama. The species in the genus Thesea was discovered in the threatened low-light reef environment on Hannibal Bank, 60 kilometers off mainland Pacific Panama, by researchers at the Smithsonian Tropical Research Institute in Panama (STRI) and the Centro de Investigación en Ciencias del Mar y Limnología (CIMAR) at the University of Costa Rica.
Scientists established the new species, Thesea dalioi, by comparing its physical traits, such as branch thickness and the bright red colony color, with the...
Scientists have succeeded in observing the first long-distance transfer of information in a magnetic group of materials known as antiferromagnets.
An international team of researchers has mapped Nemo's genome, providing the research community with an invaluable resource to decode the response of fish to...
Graphene is considered a promising candidate for the nanoelectronics of the future. In theory, it should allow clock rates up to a thousand times faster than today’s silicon-based electronics. Scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) and the University of Duisburg-Essen (UDE), in cooperation with the Max Planck Institute for Polymer Research (MPI-P), have now shown for the first time that graphene can actually convert electronic signals with frequencies in the gigahertz range – which correspond to today’s clock rates – extremely efficiently into signals with several times higher frequency. The researchers present their results in the scientific journal “Nature”.
Graphene – an ultrathin material consisting of a single layer of interlinked carbon atoms – is considered a promising candidate for the nanoelectronics of the...
03.09.2018 | Event News
27.08.2018 | Event News
17.08.2018 | Event News
19.09.2018 | Life Sciences
19.09.2018 | Physics and Astronomy
19.09.2018 | Information Technology