scholarly journals Increasing The Efficiency Of Thermal Processing Under The Influence Of Magnetic Fields

2020 ◽  
Vol 02 (11) ◽  
pp. 428-434
Author(s):  
Umidjon Kasimov ◽  
◽  
Zulfiyaxon Mamataliyeva ◽  
Keyword(s):  
Thermal Treatment ◽  
Magnetic Fields ◽  
Impact Toughness ◽  
Thermal Processing ◽  
Impact Resistance ◽  
Vertical Direction ◽  
Technological Parameters ◽  
The Impact

In this article it is proposed to increase the impact resistance of alloyed stamped steels during magneto thermal treatment without changing the hardness. Determination of the optimal technological parameters for magneto thermal treatment of steels 5ХНМ, ЗХЗМЗФ, 4Х5МФС, 4Х5В2ФС. It is recommended to increase the impact toughness when processing steel 4X5В2ФС with a cyclic magnet in the vertical direction of the samples during magneto thermal treatment.

scholarly journals Problems of Analyzing Microstructure Images in Assessing the Impact of Technological Parameters of Combined Strain Wave Hardening on the Quality of the Surface Layer

2019 ◽  
Author(s):  
Андрей Киричек ◽  
Andrey Kirichek ◽  
Дмитрий Соловьев ◽  
Dmitriy Solovyev ◽  
Александр Хандожко ◽  
...  
Keyword(s):  
Surface Layer ◽  
Thermal Treatment ◽  
Strain Wave ◽  
Technological Parameters ◽  
Steel Microstructure ◽  
Main Indicator ◽  
Metallographic Images ◽  
Surface Layer Quality ◽  
The Impact

The problems of analyzing metallographic images and the method of their solution using modern software for the analysis of metallographic images are described. There is given an analysis of microstructure images as the main indicator of the surface layer quality by the example of studying the research results of strain wave hardening combinations and chemical-thermal treatment, in particular the influence of previous strain wave hardening and subsequent thermal and chemical- thermal treatment on the alloy steel microstructure or previous thermal and chemical- thermal treatment and subsequent strain wave hardening. On the basis of the analysis the effectiveness of strain wave hardening and chemical and thermal treatment is established.

The Influence of the Diffusion on Adherence of the 60T Deposits Obtained by Thermal Spraying in Electric Arc

2013 ◽  
Vol 371 ◽  
pp. 270-274 ◽  
Author(s):  
Stefan Lucian Toma ◽  
Diana Antonia Gheorghiu ◽  
Steluta Radu ◽  
Costică Bejinariu
Keyword(s):  
Thermal Treatment ◽  
Thermal Processing ◽  
Thermal Spraying ◽  
Xrd Analysis ◽  
Electric Arc ◽  
Processing Method ◽  
Thermal Treatments ◽  
Technological Parameters ◽  
Spraying Process

The physic-chemical and mechanical properties of steel deposits obtained by thermal spraying depend on technological parameters of the spraying process. Generally, wear resistance of the deposits depends on the degree of porosity and the adhesion of the layer to the substrate. In the case of the deposits obtained by spraying, studies have shown that between deposited layer (SD) and substrate (S) there are the following types of adhesions: mechanical, metallurgical, superficial, physical and diffusive. Each type of adherence, enumerated above, works through a well-defined mechanism so that it can be said that the adhesion of the obtained deposits by thermal spray is a sum of mechanisms which interacting. How these mechanisms interact, as well the percentage of the influence is determined by: operating parameters, by the deposit material and thermal treatments after the deposit obtaining. This paper proposes to determine the influence of thermal treatment on adherence of 60T deposits obtained by thermal spraying in electric arc- as a thermal processing method after metallization. The assessment of adherence deposit 60T - in two ways, according to with EN 582 and DIN 27201/2005 in conjunction with the investigations of electron microscopy (SEM), XRD analysis, and image analysis performed at both the zone: Coating - Interface - Substrate (CIS) has revealed the presence of diffusion and the structural constituents. The graphs of adherence variation for 60T deposits with the concentration gradient of the alloying elements of the 60T layer respectively of adherence layer (75B) obtained experimentally by investigations carried out on the substrate have demonstrated the role of the secondary thermal treatment on the deposit adherence.

Determination of Optimum Process Parameter Values in Additive Manufacturing for Impact Resistance

2019 ◽  
pp. 221-234
Author(s):  
Fasih Munir Malik ◽  
Syed Faiz Ali ◽  
Burak Bal ◽  
Emin Faruk Kececi
Keyword(s):  
3D Printing ◽  
Process Parameters ◽  
Impact Resistance ◽  
Optimum Process ◽  
Optimum Process Parameter ◽  
Manufacturing Method ◽  
Pattern Layer ◽  
Parameter Values ◽  
The Impact

3D printing as a manufacturing method is gaining more popularity since 3D printing machines are becoming easily accessible. Especially in a prototyping process of a machine, they can be used, and complex parts with high quality surface finish can be manufactured in a timely manner. However, there is a need to study the effects of different manufacturing parameters on the materials properties of the finished parts. Specifically, this chapter explains the effects of six different process parameters on the impact resistance. In particular, print temperature, print speed, infill ratio, infill pattern, layer height, and print orientation parameters were studied, and their effects on impact resistance were measured experimentally. Moreover, the optimum values of the process parameters for impact resistance were found. This chapter provides an important guideline for 3D manufacturing in terms of impact resistance of the printed parts. Furthermore, by using this methodology the effects of different 3D printing process parameters on the other material, properties can be determined.

A device for simultaneous determination of the impact resistance and hardness of insulating coatings of pipelines

2004 ◽  
Vol 40 (2) ◽  
pp. 291-295 ◽  
Author(s):  
I. P. Gnyp ◽  
M. V. Marukha ◽  
B. Ya. Heneha ◽  
V. A. Chervatyuk
Keyword(s):  
Simultaneous Determination ◽  
Impact Resistance ◽  
The Impact

scholarly journals The impact of surface dynamo magnetic fields on the chemical abundance determination

2014 ◽  
Vol 10 (S305) ◽  
pp. 368-371 ◽  
Author(s):  
Nataliya G. Shchukina ◽  
Andrii V. Sukhorukov ◽  
Javier Trujillo Bueno
Keyword(s):  
Magnetic Fields ◽  
Chemical Elements ◽  
Spectral Synthesis ◽  
Small Scale ◽  
Solar Photosphere ◽  
Temperature Structure ◽  
Large Set ◽  
Solar Abundances ◽  
The Impact

AbstractThe solar abundances of Fe and of the CNO elements play an important role in addressing a number of important issues such as the formation, structure, and evolution of the Sun and the solar system, the origin of the chemical elements, and the evolution of stars and galaxies. Despite the large number of papers published on this issue, debates about the solar abundances of these elements continue. The aim of the present investigation is to quantify the impact of photospheric magnetic fields on the determination of the solar chemical abundances. To this end, we used two 3D snapshot models of the quiet solar photosphere with a different magnetization taken from recent magneto-convection simulations with small-scale dynamo action. Using such 3D models we have carried out spectral synthesis for a large set of Fei, Ci, Ni, and Oi lines, in order to derive abundance corrections caused by the magnetic, Zeeman broadening of the intensity profiles and the magnetically induced changes of the photospheric temperature structure. We find that if the magnetism of the quiet solar photosphere is mainly produced by a small-scale dynamo, then its impact on the determination of the abundances of iron, carbon, nitrogen and oxygen is negligible.

scholarly journals The changes of the workpiece surfaces by hard machining by milling and burnishing

Mechanik ◽  
2018 ◽  
Vol 91 (8-9) ◽  
pp. 727-729
Author(s):  
Daniel Grochała ◽  
Emilia Bachtiak-Radka ◽  
Sara Dudzińska
Keyword(s):  
Time Use ◽  
Automotive Industry ◽  
High Hardness ◽  
The State ◽  
Functional Requirements ◽  
Technological Parameters ◽  
Shape Accuracy ◽  
Part Surface ◽  
The Impact

Today’s machines have to be characterized by increasingly better functional and operational properties. The devices should work faster, more efficiently with higher accelerations and at the same time use less energy than it was a few years ago. These requirements apply to the products from the automotive industry, aviation machine tools or machines serving people in everyday life to play or learn. At the same time, a guarantee of long and trouble-free operation is required. In connection with the above, it is increasingly difficult for the technologist to prepare parts that meet the very strict requirements of dimensional and shape accuracy and the state of the geometric structure of the surface (SGP). Also, more and more emphasis is placed on meeting the additional functional requirements of the part surface (hydrophobic or hydrophilic properties, the degree of isotropy or the ability to maintain coatings and lubricants). The paper presents the results of the work aimed at determining the effect of technological parameters of milling and burnishing when treating the surface of parts in the state improved by heat to high hardness. The work focused in particular on the determination of the impact of the strategy of the implemented treatment on changes in the value of SGP indices describing the load-bearing capacity of the surface.

Low Temperature Mechanical Properties of Power Transmission Tower Steel

2017 ◽  
Vol 898 ◽  
pp. 772-777
Author(s):  
Jia Xing Wang ◽  
Xu Ming Wang ◽  
Hui Guo ◽  
Ai Min Zhao ◽  
Liu Wei
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Impact Toughness ◽  
Large Scale ◽  
Rolling Direction ◽  
Vertical Direction ◽  
Total Elongation ◽  
Transmission Tower ◽  
Weld Region ◽  
The Impact

The tensile and impact tests were used to study the mechanical properties under different temperatures of 300 mm large-scale angle steel at different positions, especially the tensile strength, yield strength, total elongation and impact toughness in the range of-40 oC to 20 oC. The results showed that different regions had great differences in the microstructures and impact toughness, in which the size of edge region was the smallest and the impact toughness was the best. However, the coarsened grain of heat affected zone at weld region had deteriorated to the low temperature impact toughness. When the impact energy was 34 J, the ductile-brittle transition temperature of weld, center, vertex and edge were-7.2 oC, -33.0 oC, -31.5 oC and far less than-40 oC, respectively. Meanwhile, because the banded structure was detrimental to the ductility, the elongation of rolling direction was lower than vertical direction. The strength of weld region was higher than other locations, but the elongation was obviously decreased.

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