scholarly journals Evaluation of the quality of three-layer steel bimetallic strips obtained on a unit of continuous casting and deformation

2021 ◽  
Vol 64 (10) ◽  
pp. 755-760
Author(s):  
O. S. Lekhov ◽  
M. M. Shevelev
Keyword(s):  
Continuous Casting ◽  
Deformation Process ◽  
Strain State ◽  
Steel Strip ◽  
Stress Strain ◽  
Steel 09G2s ◽  
Cladding Layer ◽  
Stress Strain State ◽  
Cladding Layers

Today there is an urgency of creating high-performance continuous processes for the production of bimetals. The article describes the main tasks of improving the quality of the materials under consideration. Two stages of the technology for producing steel three-layer bimetallic strips on the unit of a combined continuous casting and deformation process are considered. The authors give recommendations on the conduct of the technological process in order to obtain high-quality bimetallic strips on such unit. The problem statement is presented. The material considers initial data for determining the temperature of the steel base strip and the stress-strain state of the metals of the cladding layers and the strip in deformation center of a three-layer bimetallic ingot. A model for calculating and a method for solving problems of thermal conductivity and elastoplasticity are shown. Regularities of the temperature change of the main steel strip are given during its passage through the molten metal of the cladding layer. Stress-strain state of the metals of the main strip and cladding layers in the deformation center was determined when three-layer bimetallic steel strips were obtained on the unit of combined continuous casting and deformation process. The authors describe the values of compression of the main steel strip and mutual displacement of the layers during compression of the bimetallic ingot by the strikers. Regularities of the distribution of axial and tangential stresses are shown along the contact line of the cladding layer with the striker. The evaluation of the process of obtaining bimetal steel 09G2S - steel 13KhFA - steel 09G2S was made on a pilot unit for continuous casting and deformation. Microstructure of the main strip and cladding layers of a three-layer bimetallic steel strip is shown when a combined continuous casting and deformation process is obtained in one unit.

scholarly journals Continuous casting and deformation plant for the production of steel three-layer bimetallic strips

2020 ◽  
Author(s):  
O.S. Lekhov ◽  
M.M. SHevelev ◽  
D.H. Bilalov
Keyword(s):  
Continuous Casting ◽  
Molten Metal ◽  
Deformation Zone ◽  
Strain State ◽  
Steel Strip ◽  
Combined Process ◽  
Steel 09G2s ◽  
09G2s Steel ◽  
Cladding Layer ◽  
Cladding Layers

The technology of obtaining steel three-layer bimetallic strips on the installation of a combined process of continuous casting and deformation is described. The regularities of changes in the temperature of the main steel strip during its passage through the molten metal of the cladding layer are established. The stress-strain state of the metals of the main strip and the cladding layers in the deformation zone during the production of steel three-layer bimetallic strips is determined. The results of a study of the microstructure of the steel 09G2S – steel 13XFA – steel 09G2S bimetal obtained at a pilot installation for continuous casting and deformation are presented.

scholarly journals PRODUCTION OF THREE-LAYER STEEL BIMETALLIC STRIPS IN THE UNIT OF CONTINUOUS CASTING AND DEFORMATION. REPORT 2

2019 ◽  
Vol 62 (10) ◽  
pp. 763-768
Author(s):  
O. S. Lekhov ◽  
A. V. Mikhalev ◽  
M. M. Shevelev
Keyword(s):  
Continuous Casting ◽  
Strain State ◽  
Geometric Model ◽  
Metal Flow ◽  
Stress Strain ◽  
Deformation Degree ◽  
Cladding Layer ◽  
Stress Strain State ◽  
Characteristic Lines ◽  
State Of Metals

The paper states urgency of the problem of determining stressstrain state of metals of the cladding layer and the main strip in  production of three-layer bimetal: alloyed steel-constructional steelalloyed steel. Temperature field of the main strip and cladding layer  is given to calculate stress-strain state of metals of three-layer bimetallic strip. Initial data for calculating this stress-strain state are  given. To assess the effect of coefficient of friction between cladding  layer  s and the main strip on stress-strain state of metals in deformation zone, three values of it are taken. Geometric model is described  for calculating stress-strain state and metal flow in deformation center of cladding layer. Characteristic lines and points of calculation are  provided. Technique for solving the problem of determining stresses  and flows in deformation focus is described by finite element method  using ANSYS app. Regularities of flow of cladding layer’s metal  along the length of deformation center and movement of the main  strip of bimetallic ingot are given. Values   of mutual displacement of  layers of bimetallic strip are determined as a function of deformation  degree of the cladding layer. And the recommendations are given on  this degree to improve quali ty of a three-layer bimetal. Regularities  of distribution of axial and tangential stresses in deformation center  are presented for production of steel three-layer bimetallic strips in  the unit of combined continuous casting and deformation. Stress state  of the cladding layer’s metal in focus of cyclic deformation was estimated from the position of improving quality of three-layer bimetallic strips produced in such unit.

3D Simulation of Stress-Strain State of Plasma Arc Surfacing by CAD/CAE Software Sysweld

2014 ◽  
Vol 1029 ◽  
pp. 1-7
Author(s):  
Rayna Dimitrova ◽  
Alexander Nedelchev ◽  
Antonio Nikolov
Keyword(s):  
Deformation Process ◽  
Strain State ◽  
3D Simulation ◽  
Visual Environment ◽  
Plasma Arc ◽  
Technological Parameters ◽  
State Distribution ◽  
Stress Strain ◽  
Stress Strain State ◽  
Cae Simulation

The deformation process during the plasma arc surfacing is analyzed by CAD/CAE software SysWeld under Visual Environment using 3D simulation. The aim of simulation is visualization of a temperature field and a stress-strain state distribution as resul ts of surfacing under typical technological parameters of plasma arc processing which could be used for education. Key w ords : CAD/CAE simulation , plasma arc surfacing , stress-strain state

scholarly journals Structural solution of the horizontal joint of floor slabs in girderless frame

2021 ◽  
Vol 274 ◽  
pp. 03017
Author(s):  
Juliya Mironova
Keyword(s):  
Strain State ◽  
Precast Concrete ◽  
Stress Strain ◽  
Stress Strain State ◽  
Floor Slabs ◽  
Speed Up ◽  
Shear Compliance ◽  
Horizontal Joint ◽  
Structural Solution

Despite the widespread use of monolithic construction, precast concrete remains in demand in the construction of residential and administrative buildings. Regardless of the advantages in technology and the quality of work, it is necessary and appropriate to modernize the existing design solutions, which allows you to simplify and speed up the technological operations during construction. Moreover, in the construction of complex nodes and joints, the qualification of workers is important, so simplifying the work without losing the quality of construction and ensuring strength, stability and durability is an important task. This problem can be solved by using modern embedded parts in the joints that do not require welding and other complex technological operations. In this paper, a constructive solution of the horizontal joint of the floor slabs located in the zone of action of minimal forces is proposed on the example of a girderless frame. The purpose of the study is to determine the stress-strain state of the proposed structural solution of the horizontal joint of floor slabs using loopshaped embedded parts «PFEIFER» and to develop recommendations for determining the shear compliance. Based on the analysis of the results of numerical modeling, the features of the stress-strain state of the joint during shear operation are revealed. The results obtained can be used in the design of buildings with precast-monolithic ringless frames, in the modernization of existing standard solutions of precast-monolithic frames, as well as other load-bearing systems made of precast concrete.

scholarly journals Plastic Folding of Bar Stocks of Round and Barrel-Shaped Sections

2022 ◽  
Author(s):  
O.S. Zhelezkov
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Cross Sections ◽  
Deformation Process ◽  
Strain State ◽  
Stress Strain ◽  
Plastic Bending ◽  
Bending Angle ◽  
Element Modeling ◽  
Stress Strain State

Abstract. Research has been carried out on the process of plastic folding of bar stocks with round and barrel-shaped cross-sections. The dependence of the movement of the movable tool on the bending angle has been established. The force parameters of the deformation process and the stress-strain state in the bending workpiece are determined based on the results of finite element modeling of plastic bending.

Investigation of the Influence of Geometric and Technological Factors on the Stress-Strain State of Metal in the Implementation of the Combined Rolling-Pressing Process

2014 ◽  
Vol 936 ◽  
pp. 1918-1924 ◽  
Author(s):  
Sergey Lezhnev ◽  
Eugeny Panin
Keyword(s):  
Metal Forming ◽  
Strain State ◽  
New Technology ◽  
Grain Structure ◽  
Stress Strain ◽  
Technological Factors ◽  
Stress Strain State ◽  
Fine Grain ◽  
The Impact

In the development of new technology metal forming the main purpose is improvement the quality of the source material. The main aspect of quality improvement is increasing the strength characteristics. Often to increase the strength of deformable metal should be given reduced grain structure, up to subultra and even nanolevel. There are several ways to obtain sub-ultra-fine-grain structure of metals, and one of those ways is a method of severe plastic deformation (SPD), implemented in the whole volume of the deformable metal.In this work computer modeling was performed of the combined process "rolling-pressing" with the use of grooved rolls and equal channel step matrix with varying basic geometric and technological factors which have a significant impact on the process, what was made for the analysis of the impact of various factors on the stress-strain state of the process.

Study and analysis of stress-strain state of shearing operations of sheet stamping

2021 ◽  
pp. 499-509
Author(s):  
V.N. Kokorin ◽  
V.P. Tabakov ◽  
O.I. Morozov ◽  
Yu.A. Titov ◽  
N.V. Mishov ◽  
...  
Keyword(s):  
Process Simulation ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State ◽  
Sheet Stamping

The analysis results of the effect of the inter-tool gap and the material on the quality of the punching products are presented. The issues for determining of the rational values range of the inter-tool gap, taking into account the result of the shearing process simulation in the LS-DYNA system.

Multiscale Simulation of the Stress-Strain State of Low Carbon Steel Strip Processed by Asymmetric Rolling

2020 ◽  
Vol 304 ◽  
pp. 107-112
Author(s):  
Dmitriy Konstantinov ◽  
Alexander Pesin ◽  
Denis Pustovoytov
Keyword(s):  
Strain State ◽  
Simulation Analysis ◽  
Steel Strip ◽  
Rolling Process ◽  
Multiscale Simulation ◽  
Local Deformation ◽  
Low Carbon ◽  
Asymmetric Rolling ◽  
Stress Strain ◽  
Stress Strain State

Asymmetric rolling with different work roll circumferential speeds is a process that can be used for improvement of mechanical properties of the processed metals and alloys. Development of the model, which allow to calculate the stress-strain state occurring in the microstructure of the ferritic-pearlitic steels during asymmetric rolling, was the main objective of this paper. Macro level models do not take into account the complicated behavior of the ferritic-pearlitic microstructure in the micro scale. Therefore, development of modelling methods, which allow predicting the properties distribution in the metal volume with the behavioral features of the microstructure under the influence of the deformation, was needed. Representative Volume Element (RVE), representing ferritic-pearlitic steel microstructure, was developed. Simulations of the asymmetric rolling process were performed and local deformation of each structural component was predicted. Selected results, as well as discussion of the effect of microstructure on obtained stress and strain distributions, are presented in the paper. Results of multiscale simulation analysis of the deformation characteristics, presented in this study, can be used for optimization of the asymmetric rolling process.

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