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.
 




Author: Vera Ivanova

Tags: Moscow Krasnoyarsk Russian science   

Next Previous

You might also find interesting:

In Vitro Fertilization Pros and Cons Prototype of Plasma Engine Launched in Novosibirsk Transgenic Plants Grow in Moscow Region PCR Versus Tuberculosis Detector for Toxic Substances Developed









Comment on our site


RSS   twitter      submit



TAGS:
earthquake  Maloyaroslavets  Mercedes-Benz Fashion Week Russia  Russian business  Altai  Volsk  Komi Republic  Pavel Bazhov  Moscow State History Museum  incident  odd news  Buzz Barometer  RockestraLive  Transaero  Russian Cinema  Russian science  the Tyumen region  North Caucasus  Russian souvenirs  Perm Territory  Nestor the Chronicler  Kashin  Arkhangelsk  Online Exhibitions  Bolshoi Theatre  Jewish Museum and Tolerance Centre  Nikolay Suyetin  Shtokman field  Russian army  AK-47  Yo-mobile  Moscow Institute of Steel and Alloys  Moscow  Lyudmila Ulitskaya  Sergey Chilikov  Cars  St. Petersburg  KrasnodART  Great Patriotic War  Russian scientists  Russian economy  LUKoil   Concerts in St. Petersburg  Russian tourism  Nature Reserves  Cossacks  Moscow Architecture  Exhibitions in Moscow  Federal Tax Service  Ufa 


Travel Blogs
Top Traveling Sites