Add to favorite
 
123
Subscribe to our Newsletters Subscribe to our Newsletters Get Daily Updates RSS


Russian Scientists Reinforce Steel with Laser and Nanoparticles
April 22, 2018 19:27


Scientists of the Moscow Power Engineering Institute, the Federal Research Center of Krasnoyarsk and the Moscow Automobile and the Road Construction State Technical University have developed a technology to increase the surface hardness and wear resistance of steel products.
The researchers found that laser processing and making surface layers strengthened with nanocarbon materials enhance the hardness of the modified material by over five times as compared to the most common technical steel. The results of the research work are published in the journal Physics of Metals and Metallography.
Surface reinforcement of steel makes it possible to increase the strength and operational properties of machine parts and tools operating under wear and contact loads. Usually, in order to change the physical or chemical properties of the material, they apply the technology of alloying, i.e. adding impurities to steel. This method can be substantially improved by using nanocarbon materials such as fullerene, graphene or nanocarbon tubes, along with a surface treatment laser.
According to Grigory Churilov, Dr.Sci.Tech., the Head of the Analytical Methods Laboratory for Investigating Substances at the Physics Institute, the advantage of the laser method is the possibility of contactless, fast and strictly dosed transfer of energy to the treated metal surface.
Russian scientists tested how the power of laser radiation affects the hardness of the surface and the friction factor of technical iron modified with nanocarbon. As a nanomaterial, soot was used, which is obtained by the production of fullerenes in an arc discharge with graphite electrodes.
Scientists have managed to select such capacities, in which the metal surface does not melt and at the same time there is a significant increase in its strength. As a rule, the hardness of the material was maximal at the center of the laser beam impact zone and decreased toward the edges. The non-homogeneous distribution of hardness increased the wear resistance of the surface, since a metal alloy made from a soft base and hard inclusions had a lower friction factor. After laser treatment, the hardness of iron coated with nanostructured carbon increased more than fivefold in comparison with the most common technical steel. The friction factor of the reinforced material turned out to be 20-30 percent less than that of the initial samples of technical iron under conditions of dry contact of the surfaces. Along with nanocarbon soot, other types of nanocarbon materials, such as fullerenes and graphene oxide, were used to harden the steel surface. To treat the surface with a nanocarbon coating, not only laser radiation, but also a beam of fast electrons was used. The maximum hardening effect (up to 8 times) was observed in the case of using fullerenes with subsequent laser treatment, and the largest depth of the hardened layer was obtained as a result of surface treatment with an electron beam.
“The hardness and wear resistance of steels, especially those containing carbon, nitrogen or boron compounds, are significantly improved after laser treatment. In addition, laser heating does not cause deformation of products”, - Alexander Eletsky, Dr. Sc., a research associate of the Moscow Power Engineering Institute explained.
The study is financially supported with a grant from the Russian Science Foundation.
GET RUSSIAN VISA
BOOK HOTELS&APARTMENTS IN RUSSIA




Author: Vera Ivanova

Tags: Moscow Krasnoyarsk    

Next Previous

You might also find interesting:

Grab Antimatter and Hold It Fast-growing Poplar Breeding Project Scientists From Yakutia Discovered a New Civilization How to Make Nanoporous Carbon Russia Plans Two Manned Flights to the Moon Annually









Comment on our site


RSS   twitter   facebook   submit

Bookmark and Share

search on the map
TAGS:
St. Petersburg  ranking  Russian scientists  Transportation  Mercedes-Benz Fashion Week Russia  Russian Desman   Russian Films  Song and Dance Ensemble of the Interior Troops   Valery Gergiev  Pussy Riot  Russian regions  Awards  State Award of the Russian Federation  Leningrad Region  Robots  capital outflow  Yaroslavl   blasphemy law  Moscow  Hostel St. Petersburg  Russian startups  technology  FIFA Fan Fest  Festivals in Moscow  Tourist Attractions  English Courtyard  Moscow hotels  travel to Russia  space  Russian Museums   Russian Cinema  Exhibitions in Moscow  Locomotive Team  PASE  Peterhof  Nilov Monastery  Norway shootings   Vasily Shuisky  Russian Music Instruments  Russian politics  music  events in Russia  Hereditary Disease  Russian business  car premiers 2012  Russian tourism  Russian roads  Lipetsk Region  Russian society  Russian hockey players 


Travel Blogs
Top Traveling Sites