scholarly journals Correction to: Modeling of Parameters of Laser Surfacing Zones and Determination of Tribotechnical Properties of Coatings Obtained by Laser Additive Technologies

2021 ◽  
pp. C1-C1
Author(s):  
Vladimir Biryukov
Keyword(s):  
Additive Technologies ◽  
Properties Of Coatings ◽  
Laser Surfacing ◽  
Tribotechnical Properties

DETERMINATION OF TECHNOLOGICAL PARAMETERS OF CULINARY PRODUCTS PRODUCTION USING MIXTURES AND EMULSIONS FOR ADDITIVE TECHNOLOGIES

2020 ◽  
pp. 189-198
Author(s):  
A. Meliaschenya ◽  
I. Kaltovich ◽  
G. Pinchuk
Keyword(s):  
Broiler Chicken ◽  
Raw Materials ◽  
Chicken Meat ◽  
Additive Technologies ◽  
Technological Parameters ◽  
Optimal Length ◽  
Layer Width ◽  
Degree Of Hydration ◽  
Rational Sequence

The article presents the results of research on the determination of rational technological parameters for the production of culinary products using dry mixtures and emulsions based on animal raw materials for additive technologies. It was found that when making products using mixtures and emulsions based on broiler chicken meat, as well as a combination of broiler chicken meat and pork, pork and beef (ratio 1:1) rational height of the layer, which makes it possible to ensure stability and safety of the product shape (with a fixed diameter of the opening of the culinary syringe – 7 mm and the optimal length of the layer - 100 mm), is from 14–21 mm (with a layer width of 7 mm) and up to 133–154 mm (with a layer width of 98 mm), which allows for improved structural and mechanical (SSL – 1090.7–1099.9 Pa) and functional and technological indicators of these products (WHC – 92.7–97.5%). The rational sequence of application and the duration of chopping of the main and auxiliary raw materials for the manufacture of emulsions, the duration of preparation (3 minutes), the degree of hydration (1:2 – 1:3) and the temperature of water for the reduction of dry mixtures (60±1° C) were established, which made it possible to develop technological schemes for the production of culinary products using additive technologies.

scholarly journals ASSESSMENT TRIBOLOGICAL PROPERTIES OF COATINGS APPLIED BY HVOF TECHNOLOGY

2013 ◽  
Vol 7 (3) ◽  
pp. 135-139 ◽  
Author(s):  
Janette Brezinová ◽  
Anna Guzanová ◽  
Dagmar Draganovská ◽  
Marián Egri
Keyword(s):  
Room Temperature ◽  
Adhesive Wear ◽  
Thermal Spraying ◽  
Basic Material ◽  
High Velocity Oxygen Fuel ◽  
Properties Of Coatings ◽  
Oxygen Fuel ◽  
Spraying Method

Abstract In this article, the attention is paid to the HVOF (High Velocity Oxygen Fuel) thermal spraying method by which the progressive coatings are applied on basic material C15E (STN 412020). These coatings are based on C-17CO, WC-CO-Cr and Cr3C2-25NiCr. There was made determination of the chemical composition of the coatings and assessment of coatings quality - adhesion, microhardness, porosity and wear resistance at room temperature (21°C) and also at operational elevated temperature (900°C). Results of adhesive wear showed high quality of all evaluated coatings and their suitability to extreme tribological conditions.

Determination of adhesive characteristics of coatings by application a modern scratch test. Part 1. Possibilities of application a modern scratch test to determine adhesion properties of coatings.

2020 ◽  
Vol 76 (2) ◽  
pp. 143-152
Author(s):  
V. K. Belov ◽  
E. V. Gubarev ◽  
O. V. Krivko ◽  
A. V. Papshev ◽  
N. G. Gofman ◽  
...  
Keyword(s):  
Scratch Test ◽  
Ceramic Coatings ◽  
Strength Parameters ◽  
Subjective Character ◽  
Properties Of Coatings ◽  
Adhesion Properties ◽  
Power Characteristics ◽  
High Adhesion ◽  
Metal Products

At present, many kinds of metal products are produced with application of various coatings. Coatings along with requirements to provide their functional properties, must also meet additional general requirements, in particular, must have a high adhesion resistivity. Methods of direct measuring of adhesion characteristics considered. It was shown, that estimation of coatings adhesion properties by regular standard methods has a subjective character, since it is accomplished visually by specially trained laboratory assistants. Appearance of new standards and modern devices for determining of adhesion characteristics of different coatings by scratch test creates new possibilities of those properties regulation in digital form without subjective estimations. A methodology considered for determining coatings adhesion properties by application theory of scratch test. Estimation of strength parameters of the coating material depending on coating destruction character by power and geometric parameters of the deformation hearth was carried out. The relation of power characteristics of deformation hearth under indenter analyzed. Advantages and drawbacks of the scratch test quoted. It was noted, that implementation of new devices for the scratch test has required adoption of new standards for polymer and ceramic coatings. Implementation of those standards and devices for estimation of different coatings adhesion properties by application scratch test at present has no insuperable obstacles.

Resistance determination of joints of plastic components, made by additive technologies, to effect of negative temperatures

2021 ◽  
Vol 0 (1) ◽  
pp. 23-27
Author(s):  
I. S. Nefyolov ◽  
◽  
N. I. Baurova ◽  
Keyword(s):  
Low Temperature ◽  
Room Temperature ◽  
Negative Influence ◽  
Strength Properties ◽  
Additive Technologies ◽  
Strength Characteristics ◽  
Hot Gas ◽  
Negative Temperatures ◽  
Plastic Components

The effect of negative temperatures on strength characteristics of plastic component joints (hot gas welding, gluing, 3D-welding) made with the use of additive technologies has been examined. It has been found out that 3D-wlding allows one to produce joints with the highest strength properties. It was shown that low temperature values (–30 °С) did not have the negative influence on strength properties of ABS-plastic joints but even increased them as compared with analogues samples tested at the room temperature.

Comparison of Microstructure and Mechanical Properties of Co-Based and Fe-Based Alloy Coatings Deposited by PTA

2013 ◽  
Vol 834-836 ◽  
pp. 617-622 ◽  
Author(s):  
Ming Lou ◽  
Yu Xiang Xu ◽  
Hong Wu Ouyang ◽  
Yong Du
Keyword(s):  
Mechanical Properties ◽  
Electron Probe ◽  
Optical Microscope ◽  
Properties Of Coatings ◽  
Composition Distribution ◽  
Stellite 6 ◽  
Plasma Transferred Arc ◽  
Scanning Electron Microcopy ◽  
Scanning Electron

Stellite 6 Co-based and Hӧganӓs Fe-based alloy coatings were deposited on austenitic engine valve using plasma transferred arc (PTA) hardfacing. The microstructures, composition distribution and mechanical properties of coatings were investigated by combining optical microscope (OM), scanning electron microcopy (SEM), field emission electron-probe analyzer (EPMA) and nanoindentation technique. The microstructures of hardfacing coatings consist of three phases which belong to hypoeutectic structure and Co-based coating has more uniformed and regularly changed microstructure. The determination of mechanical properties reveals that Co-based coating attains higher hardness value (~5.229 GPa), H/E (0.0265) and H3/E*2 (0.00323) than that of Fe-based coating, signified better wear resistance property.

Tribotechnical properties of coatings on titanium alloys

1998 ◽  
Vol 34 (2) ◽  
pp. 203-210 ◽  
Author(s):  
P. V. Nazarenko ◽  
I. E. Polishchuk ◽  
A. G. Molyar ◽  
A. E. Ostranitsa
Keyword(s):  
Titanium Alloys ◽  
Properties Of Coatings ◽  
Tribotechnical Properties

scholarly journals Influence of gas atomization parameters of alloy KhN60M on the characteristics of powder for laser surfacing

2019 ◽  
pp. 14-21
Author(s):  
K. V. Kalinin ◽  
S. A. Oglezneva ◽  
M. S. Nagaev
Keyword(s):  
Average Particle Size ◽  
Physical And Mechanical Properties ◽  
Size Composition ◽  
Additive Technologies ◽  
Spherical Particles ◽  
Average Particle ◽  
Gas Atomization ◽  
Laser Surfacing ◽  
Heat Resistant Alloy ◽  
Advantages And Disadvantages

The object of the study was alloy powders KhN60М (EP367; 06Kh15N60М1). An overview of methods for manufacturing products from heat-resistant alloy KhN60M with an analysis of their advantages and disadvantages is given. It is shown that in comparison with injection molding and hot pressing of powders from high-alloyed special steels and alloys, additive technologies allow to obtain products of complex shape with a high level of physical and mechanical properties and material utilization. The low casting properties of the alloy under study cause the research of the atomization to meet the requirements for size, shape, morphology and fluidity of powders for additive technologies. The goal of the work was to study the effect of argon pressure during gas atomization on the physical, chemical, technological properties of powders for laser surfacing, obtained from alloy KhN60М. The technology of gas spraying of liquid melt with argon on a VIGA 2B laboratory atomizer at a temperature of 1560 °C and varying the pressure of the spraying gas in the range of 22–25 mbar was used for the manufacture of metal powder KhN60М. To select the atomization parameters, the melt viscosity values were calculated using the finite element method and its temperature dependence was constructed. The calculations were made with the ProCAST computer modeling system for casting processes. The shape and size of particles, the grain size composition were investigated using laser sedimentation, electron and optical microscopy. Quantitative metallography data were processed using the VideoTest 4 software. Fluidity of powders was measured. It was found that with increasing pressure of the spraying gas, the proportion of spherical particles increased and the fluidity of the powders improved; Feret diameter, average particle size, and d50 values did not change significantly. An experimental dependence of the increase in the yield of the powder of the target fraction (40–80 μm) with a decrease in the volume of the spray gas supply was obtained. An inversely proportional dependence of the fraction of spherical particles on the fraction of the desired cut was established. The results of the study make it possible to predict the values of the output parameters of powders during the atomization of steel KhN60M. Characteristics of powders of the –80+40 μm fraction with a shape factor of 0.99 and a yield point of 14–15 g/s make it possible to use them for the manufacture of products using additive technologies.

Sign in / Sign up

Export Citation Format

Share Document