scholarly journals THE RESEARCH OF TECHNOLOGICAL PROPERTIES OF COATINGS SPRAYED WITH ELECTRIC ARC SPRAY / ELEKTROLANKINIO PURŠKIMO BŪDU UŽPURKŠTŲ DANGŲ TECHNOLOGINIŲ SAVYBIŲ TYRIMAI

2013 ◽  
Vol 5 (6) ◽  
pp. 620-624
Author(s):  
Justinas Gargasas ◽  
Algirdas Valiulis ◽  
Irmantas Gedzevičius ◽  
Šarūnas Mikaliūnas
Keyword(s):  
Mass Loss ◽  
Dry Friction ◽  
Electric Arc ◽  
Test Results ◽  
Technological Properties ◽  
Friction Test ◽  
Technological Parameters ◽  
Properties Of Coatings ◽  
Spray Coatings ◽  
Arc Spray

The paper presents dry friction test results of two experimentalSTEIN-MESYFIL wires with different chemical composition.Thermal spray coatings properties depend on the chemical compositionand the technological parameters of the spraying. Eachcoating was sprayed in the three different modes. The microhardness,porosity, oxides were analyzed in the coatings morphology.Dry friction wear was assessed in the mass loss of the coatings. Santrauka Straipsnyje pateikiami elektrolankinio purškimo būdu užpurkštų dviejų skirtingos cheminės sudėties eksperimentinių Stein-mesyfil vielų sausosios trinties tyrimų rezultatai. Terminio purškimo būdu gautų dangų savybės priklauso ne tik nuo cheminės sudėties, bet ir nuo technologinių purškimo parametrų. Kiekviena danga užpurkšta trimis skirtingais režimais. Nustatytas dangų mikrokietumas, porėtumas, oksidų kiekis ir nagrinėta dangų morfologija. Sausosios trinties dilimo rezultatai vertinti nustatant prarastąją bandinių masę.

Structure and Properties of Coatings Deposited by High Velocity Arc Spray Technique

1999 ◽  
Vol 122 (3) ◽  
pp. 646-649 ◽  
Author(s):  
Binshi Xu ◽  
Wei Zhang ◽  
Shining Ma ◽  
Baohong Tian ◽  
Xiubing Liang
Keyword(s):  
High Velocity ◽  
Test Results ◽  
Structure And Properties ◽  
Wear Properties ◽  
Properties Of Coatings ◽  
Spray Coatings ◽  
Arc Spray ◽  
Spray Technique ◽  
The Difference ◽  
Sprayed Coatings

The microstructure of spray coatings using a newly developed thermal spray technique, High Velocity Arc Spray (HVAS), was studied and compared with those of regular arc sprayed coatings. The mechanical and wear properties of HVAS coatings were also investigated. The test results showed that HVAS coatings had better mechanical properties than those of regular arc sprayed coatings. The bonding strength of HVAS Al and 3Cr13 coatings was increased by 114 percent and 51.8 percent; the relative wear resistance of HVAS coatings was about twice that of regular arc sprayed coatings. The difference of microstructure and tribological properties between HVAS and regular arc sprayed coatings was discussed. [S0742-4787(00)00203-4]

scholarly journals Electric arc spray coatings for the naval industry

2011 ◽  
Vol 4 (8) ◽  
pp. 31
Author(s):  
Laura Marcela Dimate Castellanos ◽  
José Alfredo Morales Torres ◽  
Jhon Jairo Olaya Florez
Keyword(s):  
Abrasive Wear ◽  
Electric Arc ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spray Coatings ◽  
Arc Spray ◽  
Thermal Barriers ◽  
Before And After ◽  
Coating Microstructure ◽  
Steel Substrates

Carbon and stainless steel, as well as Fe-Nb-Cr-W coatings were deposited on steel substrates by using electric arc spray, and its possibility of applying such coatings in the naval industry was analyzed. In order to achieve this, the coating microstructure was characterized before and after the corrosion, abrasive wear, and thermal barrier tests. Corrosion resistance was analyzed via potenciodynamic polarization test using a NaCl electrolyte at 3%; abrasive wear resistance was measured by using a three-component system following ASTM G-65 recommendations, while quality control as thermal barriers was studied by using EIS tests. Scanning Electron Microscopy, optical microscopy and X-ray diffraction were used to characterize the microstructure of the coatings.

Experimental Research Based on the Technological Parameters Influence at the Interface Material - Layers Deposited

2015 ◽  
Vol 811 ◽  
pp. 24-28
Author(s):  
Camelia Boboc
Keyword(s):  
Experimental Research ◽  
High Resistance ◽  
Industrial Area ◽  
Electric Arc ◽  
Surface Coatings ◽  
Technical Documentation ◽  
Technological Parameters ◽  
Arc Spray ◽  
Wear And Corrosion ◽  
Resistance To Wear

Processing by thermal spray metallization is a process widely used in industrial area. Surface Coatings systems using electric arc spray metallization opens up a range of new possibilities for refurbishing and bringing the parameters according to the technical documentation, the main objective is to ensure a high resistance to wear and corrosion. Through this research I set a schedule to settle the experimental influences how technological parameters on interface material - deposited layers.

scholarly journals Development of electric arc spray coatings for reconditioning rods of hydraulic cylinders of mining equipment, using flux-cored wires

2017 ◽  
Vol 2017 (4) ◽  
pp. 48-53
Author(s):  
T.R. Stupnitsky ◽  
◽  
M.M. Student ◽  
V.I. Pokhmursky ◽  
M.B. Tymus ◽  
...  
Keyword(s):  
Electric Arc ◽  
Mining Equipment ◽  
Spray Coatings ◽  
Arc Spray ◽  
Hydraulic Cylinders ◽  
Cored Wires

scholarly journals Development of electric arc spray coatings for reconditioning rods of hydraulic cylinders of mining equipment, using flux-cored wires

2017 ◽  
Vol 2017 (4) ◽  
pp. 44-48
Author(s):  
T.R. Stupnitsky ◽  
◽  
M.M. Student ◽  
V.I. Pokhmursky ◽  
M.B. Tymus ◽  
...  
Keyword(s):  
Electric Arc ◽  
Mining Equipment ◽  
Spray Coatings ◽  
Arc Spray ◽  
Hydraulic Cylinders ◽  
Cored Wires

Operation intensification methods of aggressive industrial sewage neutralization facilities

2020 ◽  
Vol 76 (11) ◽  
pp. 1149-1153
Author(s):  
N. S. Tsarev ◽  
V. I. Aksenov ◽  
I. I. Nichkova
Keyword(s):  
Cold Water ◽  
Specific Productivity ◽  
Technological Properties ◽  
Technological Parameters ◽  
Preliminary Heating ◽  
Sediment Treatment ◽  
Circulating Water ◽  
Equipment Operation ◽  
Sediment Volume ◽  
Industrial Sewage

To neutralize the waste pickling solutions and rinsing water, resulting from cleaning metal products s surface of rust by acids solutions, lime is used. Being cheap, this method of sewage neutralization has considerable drawbacks. Forming in the technological pipes strong gypsum depositions and low specific productivity of the equipment for sediment dewatering are most significant of them. Characteristic of aggressive industrial sewage, formed at pickling of ferrous metals presented. Methods of elimination of drawbacks of industrial sewage neutralization by lime considered, including stabilization of neutralized industrial sewage and control of properties of the sediment formed. It was noted, that stability of the circulating water can be provided by accelerating of crystallization of the forming gypsum sediments by introducing in it fine priming powder and heating the neutralized water up to 65-70 °С followed by thermal softening of a part of circulating water, removed out of the circulating system. It was shown, that the heating of the water and the ongoing changes of the composition and properties of the sediment result in decrease of filtration resistance 2-3 folds, increase of deposition speed 3-4 folds and decrease the sediment volume 1.5-2 folds comparing with lime neutralization in cold water. Calculated dozes of lime at the heating were taken the same as at the regular lime neutralization. Elimination of the circulating water oversaturation by bi-water gypsum can be reached also by addition into the water of powder-like gypsum pulp - priming powder for microcrystals of the gypsum, followed by aeration during 30-40 min. This method was tested under industrial conditions. Technological properties of the forming sediment can be improved by sediment treatment by flocculants and preliminary heating of the neutralized water up to 65-70 °С. Control of technological properties of the sediment is done by addition of flocculants and heating of the neutralized water. Recommendations for improving operation of the neutralization facilities presented with indicating particular technological parameters of the equipment operation for sewage and sediment treatment. 

scholarly journals Pharmaco-technological researches for development of tablets composition with amlodipin and enalapril

2020 ◽  
pp. 44-55
Author(s):  
N. S. Behei ◽  
O. V. Tryhubchak
Keyword(s):  
Statistical Data ◽  
Antihypertensive Drugs ◽  
Dispersion Analysis ◽  
Wet Granulation ◽  
Technological Properties ◽  
Technological Parameters ◽  
Mathematical Planning ◽  
Treatment Regimens ◽  
Tapped Density ◽  
Functional Purpose

Ukraine has one of the highest mortality rates from cardiovascular diseases in Europe, accounting for 772.1 cases among men and 440.9 among women per 100 000 population. Antihypertensive drugs are different in dose, active substance and mechanism of action. Monotherapy is ineffective in most cases, therefore it requires a combination of several substances from different pharmacotherapeutic groups. Enalapril and amlodipine are the most often included in treatment regimens for hypertension. Therefore it is advisable to develop combined tablets with enalapril and amlodipine. The aim of the work was to study the effects of excipients on the pharmaco-technological parameters of intermediates and tablets with enalapril and amlodipine. During the work the studied excipients were grouped into 6 factors according to their functional purpose. The experiment was based on the method of mathematical planning. The tablets were preparated by compression after wet granulation. The studies were carried out according to pharmacopoeial methods. Statistical data processing was performed by dispersion analysis. During the experiment it was studied the effects of 30 excipients on the pharmaco-technological properties of granules (loss on drying), tablet mass (fluidity, angle of inclination, bulk density, tapped density) and tablets (uniformity of mass, hardness, friability and disintegration). The effect of 6 qualitative factors on the main reviews (indicators) of granules, powder masses and tablets with enalapril and amlodipine was studied. It is showed by ranked rows of advantages for the influence of excipients on 10 reviews (indicators) of granules, powder masses and tablets with enalapril and amlodipine. As a result of the study, the effects of excipients on the pharmaco-technological parameters of intermediates and tablets with enalapril and amlodipine were studied.

Cored Wire Application Using Electric Arc Spray

1998 ◽  
Author(s):  
E.R. Sampson
Keyword(s):  
Trend Analysis ◽  
Thermal Spraying ◽  
Electric Arc ◽  
Cored Wire ◽  
Arc Spray ◽  
New Development ◽  
The Future ◽  
Cored Wires

Abstract The use of cored wires for thermal spraying is a relatively new development that is being rapidly utilized for arc spray in a wide variety of applications. This paper will discuss the existing applications and industries in which cored wire coatings are used. Additionally, this presentation will cover the effect cored wires have had on the use ofother types ofthermal spray equipment. The paper will close with a trend analysis that discusses the applications of the future.

INFLUENCE OF TECHNOLOGICAL PARAMETERS ON CHARACTERISTICS OF POLYMER COMPOSITE MATERIALS IN AUTOMATED LAYUP OF PREPREGS (review)

2021 ◽  
pp. 46-55
Author(s):  
P.N. Timoshkov ◽  
◽  
V.A. Goncharov ◽  
M.N. Usacheva ◽  
A.V. Khrulkov ◽  
...  
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Technological Properties ◽  
Technological Parameters ◽  
Technological Factors ◽  
Rolling Pressure ◽  
Material Temperature

The main technological factors when using ATL and AFP technologies are material temperature, laying speed, rolling pressure and no deviation from the required laying trajectory. The article discusses the influence of technological factors on some characteristics of polymer composite materials. The optimum laying temperature should provide the required adhesion. The rate of laying should provide heating of the material without its technological properties. The rolling pressure during laying should ensure optimal porosity and thickness of the material.

The Electric Arc Spray Manufacture of Rapid Production Tooling: A Case Study

1998 ◽  
Author(s):  
A.P. Newbery ◽  
P.S. Grant ◽  
R.M. Jordan ◽  
A.D. Roche ◽  
T.C. Carr
Keyword(s):  
Injection Moulding ◽  
Low Cost ◽  
Spray Forming ◽  
Electric Arc ◽  
Internal Stresses ◽  
Forming Process ◽  
Polymer Injection ◽  
Spray Process ◽  
Arc Spray ◽  
The U.S

Abstract The manufacture of tooling using the electric arc spray process to spray steel directly onto a master pattern offers substantial reductions in the lead times required to make complex tooling for polymer injection moulding and other applications. The process of spray forming is fast, efficient, and low cost, and has been shown to be dimensionally accurate with proper control over the residual stresses that develop during spraying. Poor dimensional control because of high internal stresses in thick arc sprayed steel coatings is well known, but these problems can be avoided by the use of correct spraying conditions. This paper describes the STD SPRAYFORM process for the manufacture of tooling for the polymer injection moulding of a component for a leading company in the U.S. The steps in the spray forming process, both before and after spraying, are described. The spray forming route competed directly with a traditional method for toolmaking and considerably reduced the lead time from order to completion. The tooling produced by spray forming has been operating commercially in production in the U.S. and has to date produced in the region of half a million parts without appreciable wear. The incorporation of contoured cooling channels during spraying has enabled plastic injection moulding cycle times to be decreased by 15%.

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