Магматические и постмагматические минеральные ассоциации пород массива Малютка (худолазовский комплекс Южного Урала)

Проведены детальные минералогические исследования пород массива Малютка худолазовского дифференцированного комплекса. Выполнено описание морфологии и химического состава многих породообразующих и акцессорных минералов. По результатам исследований выделены магматический и постмагматический (гидротермально-метасоматический) этапы формирования пород. Обсуждаются проблемы, связанные с генетической интерпретацией ряда породообразующих и рудных минералов. Сделан вывод о полигенной природе формирования шпинелидов. Выполнена оценка температуры равновесия в системе «Ti-магнетит–ильменит» (633–650°C), а также температуры кристаллизации хлорита, замещающего флогопит и роговую обманку (145–185°C)

Постостроводужный интрузивный магматизм Западно-Магнитогорской зоны Южного Урала

It is shown that post-island-arc intrusive magmatism of the West-Magnitogorsk Zone embraced the time from Late Devonian to Late Carbon. The new systematization scheme for all variety of intrusive formations is proposed based on the new geological-geochemical data and evolutionary-genetic reconstructions. It presents four discrete intrusive series: 1) gabbro-norite-diorite, 2) gabbro-diorite-granite, 3) peridotite-gabbro-diorite-granite, 4) lamprophyre-dolerite. Each series is characterized by original properties of the body’s morphology and rocks petrography, mineralogy and geochemistry.Показано, что постостроводужный интрузивный магматизм Западно-Магнитогорской зоны охватил интервал времени от позднего девона до позднего карбона. На основе новых геолого-минеральногеохимических данных и эволюционно-генетических реконструкций предложена новая схема систематизации всего многообразия магматитов в виде четырёх дискретных интрузивных серий: 1) габбро-норитдиоритовой, 2) габбро-диорит-гранитовой, 3) перидотит-габбро-диорит-гранитовой, 4) лампрофирдолеритовой. Каждая серия характеризуется особенностями морфологии тел, а также петрографии, минералогии и геохимии пород

Analysis of the impact of informative heat treatment parameters on the properties of hardening of the surface layers

© Published under licence by IOP Publishing Ltd.The change features of surface steel layer were investigated under influence of plasma source of concentrated energy. The results of research of the effect of plasma treatment process on the microstructure and the thickness distribution of microhardness of the product and the formation of heat affected zone were presented. The resulting information (informative) data and measured values of microhardness in the hardened layers, depending on the plasma processing modes allow you to manage the process of heat treatment of metals. Designed programming model that works on the basis of the solution of the heat equation, allows to predict and investigate the temperature field after exposure to the plasma stream

Analysis of the impact of informative heat treatment parameters on the properties of hardening of the surface layers

© Published under licence by IOP Publishing Ltd.The change features of surface steel layer were investigated under influence of plasma source of concentrated energy. The results of research of the effect of plasma treatment process on the microstructure and the thickness distribution of microhardness of the product and the formation of heat affected zone were presented. The resulting information (informative) data and measured values of microhardness in the hardened layers, depending on the plasma processing modes allow you to manage the process of heat treatment of metals. Designed programming model that works on the basis of the solution of the heat equation, allows to predict and investigate the temperature field after exposure to the plasma stream

The effects of disorder in dimerized quantum magnets in mean field approximations

We study theoretically the effects of disorder on Bose-Einstein condensates (BEC) of bosonic triplon quasiparticles in doped dimerized quantum magnets. The condensation occurs in a strong enough magnetic field Hc, where the concentration of bosons in the random potential is sufficient to form the condensate. The effect of doping is partly modeled by delta - correlated disorder potential, which (i) leads to the uniform renormalization of the system parameters and (ii) produces disorder in the system with renormalized parameters. These approaches can explain qualitatively the available magnetization data in the Tl_(1-x)K_(x)CuCl_3 compound taken as an example. In addition to the magnetization, we found that the speed of the Bogoliubov mode has a peak as a function of doping parameter, x. No evidence of the pure Bose glass phase has been obtained in the BEC regime.Comment: Includes 19 pages, 5 figure

MATRIX ANALYZER FOR THE INTENSITY DISTRIBUTION IN A LASER BEAM.

An analyzer is described for operational monitoring of the power distribution provided by an IR laser. The distribution is displayed as 16 isozones on a light-emitting diode matrix. The device enables one to measure the total power and also the power in any isozone simultaneously. The time required to interrogate all zones is 100 msec, while the maximum flux density is about 1 kW/cm**2

Technology of overlay laser welding of durable powdery into blade edge of miller

© Published under licence by IOP Publishing Ltd. In this paper the laser welding technology features of wear-resistant powders on the hob's cutting edge with laser radiation (LR) focus positioning control are described. It is shown that the quality of the welding process depends on the processing regimes, the energy characteristics of the laser technological complex (LTC), the positioning accuracy of the LR focus and its perpendicularity relative to the plane of a router bit. In this paper we deal with the questions of stabilization of LTC parameters and LR positioning as well

Management of laser welding based on analysis informative signals

© Published under licence by IOP Publishing Ltd. Features of formation precision weld of metal were presented. It has been shown that the quality of the welding process depends not only on the energy characteristics of the laser processing facility, the temperature of the surface layer, but also on the accuracy of positioning laser focus relative to seam and the workpiece surface. So the laser focus positioning accuracy is an estimate of the quality of the welding process. This approach allows to build a system automated control of the laser technological complex with the stabilization of the setpoint accuracy of of positioning of the laser beam relative to the workpiece surface

Method of control position of laser focus during surfacing teeth of cutters

© Published under licence by IOP Publishing Ltd. Providing the quality laser of surfacing the edges of teeth requires control not only the energy of the radiation parameters, but also the position of the focal spot. The control channel of position of laser focus during surfacing, which determines the parameters of quality of the deposited layer, was calculated in the work. The parameters of the active opto-electronic system for the subsystem adjust the focus position relative to the deposited layer with a laser illumination of the cutting edges the teeth cutters were calculated, the model of a control channel based on thermal phenomena occurring in the zone of surfacing was proposed

Study of processes of steels surfaces modification with highly concentrated energy flows

The peculiarities of steels surface layer modification under the influence of highly concentrated energies which increase the parts and tools quality have been studied. Here are the results of microstructure studies of tool steels and steel 45 samples for the analysis of strengthened steel and surface layer formation conditions. The conditions for the required quality of modified surfaces achievement using nitriding, hardening and cladding