This research has produced multicomponent titanium-doped chromium coatings to strengthen the working surfaces of press tooling dies operated under aggressive conditions during the vulcanization of products from new elastomeric materials. The pressing was carried out on a hydraulic vulcanization press 100-400 2E.
Sheets of electrical steel are produced by hot and cold working by pressure (mainly by rolling). In this case, the load during rolling should be chosen in such a way as not to impair the electrical properties of the steels. Received two sheets of electrical steel from different production batches. One of the sheets of electrical steel is prematurely destroyed at the stage of machining parts for electrical transformers.
To develop any process of laser technology, you need to solve 3 problems: 1) What are the properties of the interaction of laser radiation with matter must be selected to achieve the goal (resonant – non-resonant, absorption-scattering, photo- or thermal absorption, heating, hardening, melting, softening, evaporation, decomposition, coagulation, etc.); 2) What type of laser source should be used to achieve this goal (wavelength, operation mode – continuous or pulse-frequency, power, pulse duration, transverse energy distribution in the beam, coherence
The paper presents the characteristics of the surface layer of d-elements of the IV group (titanium, zirconium and hafnium) after thermal diffusion saturation from a controlled oxygen-containing gas medium. Saturation was carried out at T = 750 °C for t = 5 hours at different pressures (P = 1.33∙10–1 Pa, P = 1.33∙10–2 Pa, P = 1.33∙10–3 Pa). Experimentally revealed differences in the characteristics of the surface layer of titanium, zirconium and hafnium.
In order to determine the safe operational life of the components of gas turbine engines (GTE), introductory tests of nickel-base heat-resistant alloys (NHRA) have been performed. X-ray fluorescence and X-ray diffraction analyzes, optical microscopy and Vickers hardness measurements provided data on the phase-structural state and mechanical properties of the pristine ZhS6K-VI and ZhS32-VI alloys obtained by equilibrium and high-speed directional crystallization, respectively.
The microstructure and hardness of the weld joints of DOMEX 700 steel were investigated. As a result, the optimization of the parameters of robotic arc welding in the environment of protective gases was carried out taking into account the size of the energy per unit length. The optimum modes of welding were determined. The size of the deterioration area, where there is a decrease in hardness in comparison with the main metal, for a thickness of 6 mm is 2.36 mm, and for a thickness of 3 mm is 1.51 mm.
У статті доведена доцільність використання методу атомно-силової мікроскопії при дослідженні стану та характеристик поверхонь виробів прецизійного машинобудування. Розглянуто основні напрямки досліджень топограми та фізико- механічних характеристик поверхонь виробів прецизійного машинобудування та встановлені обмеження і недоліки у використанні методу атомно-силової мікроскопії при дослідженні окремих властивостей поверхонь виробів.
The value of microhardness of the surface layers of 6 mm float glass, tempered by contact and by air method by etching in a mixture of fluoride and sulfuric acids, is researched. It was established that the microhardness value depends on the method of tempering and thickness of the etched layer. The optimal parameters of the microhardness measure of 6 mm float glass are selected and thickness of the etched layer which causes the relaxation of residual tensions is indicated.
The article is devoted to development of theoretical foundations of improving corrosion resistance of concrete protective coatings based on filled with aluminum and zinc oxides polimetylfenilseloksanu. Methods of mathematical experiment planning with regard to water absorption depending on the concrete and coating adhesion strength optimum component of the original compositions for protective coatings, determined their technological and physical and mechanical properties, the thickness of the coating, application methods and the surface of the concrete conditions of the studied.
The change of microhardness values of 6 mm float glass, depending on the measurement conditions were investigated. It was established that the value of microhardness depends on the surface moisture, the load on indentor and duration time. The optimal parameters of microhardness measurement of 6 mm float glass were chosen.