Methodology for developing a combined technological process based on modifying the properties and changing the surface layer parameter

2020 ◽  
pp. 24-31
Author(s):  
V.N. Gadalov ◽  
E.A. Filatov ◽  
A.V. Filonovich
Keyword(s):  
Surface Layer ◽  
Technological Process ◽  
Acoustic Properties ◽  
Scientific Concept ◽  
Regulatory Documents ◽  
Layer Parameter ◽  
Metal Microstructure ◽  
System Errors

The article reveals information links between acoustic properties and parameters of the metal microstructure. A large number of regulatory documents and a lack of scientific concept lead to the system errors when estimating condition of both longterm operating metal and the product in the whole. The article considers methodology for developing a combined technological process based on modification of properties and change of the coatings' surface layer parameters, with an estimation of their efficiency in terms of productivity based on the criterial use of productivity principles. The analysis of technological activities for the productivity coefficient and the criterial estimates confirmed their efficiency.

scholarly journals CHOICE THE RESTORING METHOD OF DETAILS BY QUALITY CRITERIA

2020 ◽  
Vol 1 (46) ◽  
pp. 83-91
Author(s):  
Horbenko S ◽  
Keyword(s):  
Surface Layer ◽  
Technological Process ◽  
Quality Criteria ◽  
Technological Parameters ◽  
Ion Nitriding ◽  
Optimal Method ◽  
Advantages And Disadvantages ◽  
Modification Process ◽  
Object Of Study ◽  
Quantitative Indicators

The purpose of the article is to analyze the existing methods of surface layer modification and to choose such a method of restoration of parts, which takes into account the quality criteria that affect the op­erational properties and ensure their required level after the modification process. The main methods of surface layer modification are considered in the article, the main advantages and disadvantages of technological process that can be applied are analyzed and systematized. In the article quantitative indicators of the main technological parameters of each of the considered methods of restoration of operational properties are considered and presented as a table. According to the results of the analysis, a method for choosing a rational technological process of res­toration was proposed and criteria were formed according to which the most optimal method of surface layer modification would be fulfilled. . The object of study is the quality criteria and the basic methods for restoring the performance of en­gine parts that satisfy these criteria. Using the developed methodology and the data from Table 2, a diagram of the dependence of energy consumption costs, which will be consumed when provided with a layer of certain hardness for a given thickness, was constructed. Based on the analysis, which included a comparison of the characteristics of surface hardening meth­ods and their evaluation by quality criteria, it was found that the most promising method is ion nitriding and laser thermal hardening. KEYWORDS: MODIFICATION, SURFACE LAYER, RESTORATION, QUALITY CRITERIA

Surface Layer Parameter of Concrete in Relation to Deicing Salt Scaling Resistance

2014 ◽  
Vol 1000 ◽  
pp. 298-301 ◽  
Author(s):  
Jaroslav Urban ◽  
Michaela Kostelecká ◽  
Tomas Klecka
Keyword(s):  
Surface Layer ◽  
Porous Structure ◽  
Concrete Structure ◽  
Hardened Concrete ◽  
Deicing Salt ◽  
Salt Scaling ◽  
Layer Parameter ◽  
Concrete Mix ◽  
Gaseous Media ◽  
Scaling Resistance

The porous structure together with surface layer, made by the compaction of concrete mix designed and by the following treatment of concrete placed, has a decisive influence on the penetration of aggressive media into the inside of concrete structure. In principle, it influences the parameters of hardened concrete and the transport of liquid and gaseous media. The surface layer of concrete is contacted as the first with aggressive substances and is an entrance gate for unwanted ones.

scholarly journals Studies of Atmospheric Parameters during SW Monsoon Period Associated with Severe Cyclone Aila and Lightning Occurrence over Ranchi Region

2012 ◽  
Vol 2012 ◽  
pp. 1-3
Author(s):  
Abhay Srivastava ◽  
Manoj Kumar ◽  
Arun K. Dwivedi
Keyword(s):  
Surface Layer ◽  
Wind Speed ◽  
Electric Field ◽  
Comparative Study ◽  
Correlation Coefficients ◽  
Atmospheric Parameters ◽  
Monsoon Period ◽  
Cyclone Aila ◽  
Layer Parameter ◽  
Sw Monsoon

A number of events are happening every time in the atmosphere in which much of them are randomly generated. Parameters are varying daily like temperature, humidity, electric field, and wind speed. Variation on surface layer parameters, events thunderstorms, earthquake, volcanoes, cyclone, tsunami, and so forth are occurring. Study and correlation between surface layer parameter and occurrence are greatly required in current research scenario. A comparative study about atmospheric parameters has been done just after the Aila; in the day when lightning occurred and correlation coefficients between these parameters are observed.

scholarly journals Modern state of technical means to remove uncontrolled vegetation

2021 ◽  
Vol 25 (1) ◽  
pp. 115-122
Author(s):  
A.A. Platonov ◽  
Keyword(s):  
Technological Process ◽  
Modern State ◽  
Manual Labor ◽  
Technological Processes ◽  
Regulatory Documents ◽  
Mechanical Methods ◽  
Linear Infrastructure ◽  
Definition Of ◽  
Specific Number

The article analyzes, systematizes and evaluates the demand for machines, mechanisms and equipment used to remove uncontrolled tree and shrub vegetation from the territories of linear infrastructural objects. The existing technological processes that form exclusively mechanical methods of removing unwanted tree and shrub vegetation are analyzed. The technical means of mechanization of work on the elements of the technological process used on the territory of linear infrastructure facilities are systematized. The predominant use of a specific number of technical means by implementing organizations is shown, indicating their characteristics and the main defining criteria of demand. It has been established that there is almost complete absence of both small means of mechanization, allowing to reduce the share of manual labor when carrying out work to remove unwanted vegetation in hard-to-reach places of the cleaned areas, and specialized pick-up loaders of felling residues. The definition of a technical means of raking up unwanted vegetation is proposed and formulated as a «forest rake» It was revealed that in a number of regulatory documents there are incorrect names for motorized hand-type brush cutters, corresponding recommendations for production are given. The results of the work can be used by enterprises engaged in the maintenance and operation of linear infrastructure facilities.

scholarly journals Technological process of uniform distribution of fertilizers over the width of the coulter

2021 ◽  
Vol 264 ◽  
pp. 04051
Author(s):  
Zafar Batirov ◽  
Tura Razzakov ◽  
Fayzilla Begimkulov ◽  
Farrukh Boymuratov
Keyword(s):  
Uniform Distribution ◽  
Technological Process ◽  
Root Development ◽  
Theoretical Studies ◽  
Mathematical Planning ◽  
Development Zone ◽  
Regulatory Documents ◽  
The Right ◽  
Theoretical Mechanics ◽  
Planning Of Experiments

The applied methods of applying fertilizers for cotton in Uzbekistan do not fully ensure the supply of nutrients to the plant's root system. The study aims to substantiate the technological process of uniform distribution of fertilizers in the root development zone and the parameters of coulters. When the fertilizer is distributed in the root development zone in tiers and the right ratio, the coefficient of their use increases, and the yield of cotton increases. The research uses the laws and rules of theoretical mechanics, mathematical statistics, mathematical planning of experiments, and the methods given in existing regulatory documents. The technology of forming new ridges instead of existing ridges and new furrows instead of existing furrows in fields with harvested husk with simultaneous fertilization and an improved chisel cultivator-fertilizer with comb-forming agents for its implementation, as well as the results of theoretical studies to substantiate the main parameters of the tuk coulter chisel-cultivator are presented. The study determined the parameters of universal fertilizer Coulter chisel-cultivator of fertilizer: the base cone of the diffuser in the form of an ellipse with minor axis width 10 mm, height tool provider relative to the upper base of the truncated cone of 60 mm, and a diameter of a half-cylinder of 20 mm.

The oxidation of Inconel alloy MA754 at low oxidation potential

1983 ◽  
Vol 41 ◽  
pp. 218-219
Author(s):  
D. N. Braski ◽  
P. D. Goodell ◽  
J. V. Cathcart ◽  
R. H. Kane
Keyword(s):  
Surface Layer ◽  
Oxidation Potential ◽  
Metal Interface ◽  
Elevated Temperature Strength ◽  
Surface Conditions ◽  
Inconel Alloy ◽  
Inco Alloy ◽  
Resistance To Oxidation ◽  
Oxide Particles ◽  
Cold Worked

It has been known for some time that the addition of small oxide particles to an 80 Ni—20 Cr alloy not only increases its elevated-temperature strength, but also markedly improves its resistance to oxidation. The mechanism by which the oxide dispersoid enhances the oxidation resistance is being studied collaboratively by ORNL and INCO Alloy Products Company.Initial experiments were performed using INCONEL alloy MA754, which is nominally: 78 Ni, 20 Cr, 0.05 C, 0.3 Al, 0.5 Ti, 1.0 Fe, and 0.6 Y2O3 (wt %).Small disks (3 mm diam × 0.38 mm thick) were cut from MA754 plate stock and prepared with two different surface conditions. The first was prepared by mechanically polishing one side of a disk through 0.5 μm diamond on a syntron polisher while the second used an additional sulfuric acid-methanol electropolishing treatment to remove the cold-worked surface layer. Disks having both surface treatments were oxidized in a radiantly heated furnace for 30 s at 1000°C. Three different environments were investigated: hydrogen with nominal dew points of 0°C, —25°C, and —55°C. The oxide particles and films were examined in TEM by using extraction replicas (carbon) and by backpolishing to the oxide/metal interface. The particles were analyzed by EDS and SAD.

Structural analysis of the surface-layer protein of spirillum serpens by high-resolution electron microscopy

1983 ◽  
Vol 41 ◽  
pp. 738-739
Author(s):  
W. H. Wu ◽  
R. M. Glaeser
Keyword(s):  
Electron Microscopy ◽  
Surface Layer ◽  
Structural Analysis ◽  
High Resolution ◽  
Low Dose ◽  
High Resolution Electron Microscopy ◽  
Optical Diffraction ◽  
Surface Layer Protein ◽  
Morphological Unit ◽  
Resolution Electron

Spirillum serpens possesses a surface layer protein which exhibits a regular hexagonal packing of the morphological subunits. A morphological model of the structure of the protein has been proposed at a resolution of about 25 Å, in which the morphological unit might be described as having the appearance of a flared-out, hollow cylinder with six ÅspokesÅ at the flared end. In order to understand the detailed association of the macromolecules, it is necessary to do a high resolution structural analysis. Large, single layered arrays of the surface layer protein have been obtained for this purpose by means of extensive heating in high CaCl2, a procedure derived from that of Buckmire and Murray. Low dose, low temperature electron microscopy has been applied to the large arrays.As a first step, the samples were negatively stained with neutralized phosphotungstic acid, and the specimens were imaged at 40,000 magnification by use of a high resolution cold stage on a JE0L 100B. Low dose images were recorded with exposures of 7-9 electrons/Å2. The micrographs obtained (Fig. 1) were examined by use of optical diffraction (Fig. 2) to tell what areas were especially well ordered.

Electron-Mirror Microscopic Aspects of Ferroelectric Domains of BaTiO3 And Ca2Sr (C2H5CO2)6

1970 ◽  
Vol 28 ◽  
pp. 478-479
Author(s):  
Teruo Someya ◽  
Jinzo Kobayashi
Keyword(s):  
Surface Layer ◽  
Electric Fields ◽  
Quantitative Study ◽  
Recent Progress ◽  
Ferroelectric Domain ◽  
Resolving Power ◽  
Surface Pattern ◽  
Crystal Surfaces ◽  
One Dimensional ◽  
Ferroelectric Domains

Recent progress in the electron-mirror microscopy (EMM), e.g., an improvement of its resolving power together with an increase of the magnification makes it useful for investigating the ferroelectric domain physics. English has recently observed the domain texture in the surface layer of BaTiO3. The present authors ) have developed a theory by which one can evaluate small one-dimensional electric fields and/or topographic step heights in the crystal surfaces from their EMM pictures. This theory was applied to a quantitative study of the surface pattern of BaTiO3).

Microstructure of Electro-Eroded Cemented Carbide Surfaces

1968 ◽  
Vol 26 ◽  
pp. 284-285
Author(s):  
V. N. Filimonenko ◽  
M. H. Richman ◽  
J. Gurland
Keyword(s):  
Surface Layer ◽  
Cobalt Content ◽  
Cemented Carbides ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
Metallographic Examination ◽  
Standard Procedures ◽  
Face Centered ◽  
Diamond Paste ◽  
Plastic Carbon

The high temperatures and pressures that are found in a spark gap during electrical discharging lead to a sharp phase transition and structural transformation in the surface layer of cemented carbides containing WC and cobalt. By means of X-ray diffraction both W2C and a high-temperature monocarbide of tungsten (face-centered cubic) were detected after electro-erosion. The W2C forms as a result of the peritectic reaction, WC → W2C+C. The existence and amount of the phases depend on both the energy of the electro-spark discharge and the cobalt content. In the case of a low-energy discharge (i.e. C=0.01μF, V = 300v), WC(f.c.c.) is generally formed in the surface layer. However, at high energies, (e.g. C=30μF, V = 300v), W2C is formed at the surface in preference to the monocarbide. The phase transformations in the surface layer are retarded by the presence of larger percentages of cobalt.Metallographic examination of the electro-eroded surfaces of cemented carbides was carried out on samples with 5-30% cobalt content. The specimens were first metallographically polished using diamond paste and standard procedures and then subjected to various electrical discharges on a Servomet spark machining device. The samples were then repolished and etched in a 3% NH4OH electrolyte at -0.5 amp/cm2. Two stage plastic-carbon replicas were then made and shadowed with chromium at 27°.

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