scholarly journals Mathematical Modeling in View of Property Prediction of DD11 Steel Laminated in LBC Liberty Galati

2021 ◽  
Vol 44 (2) ◽  
pp. 5-10
Author(s):  
Marian-Iulian NEACȘU
Keyword(s):  
Mathematical Modeling ◽  
Mechanical Properties ◽  
Mathematical Model ◽  
Rolling Mill ◽  
Property Prediction ◽  
Significant Time ◽  
Active Experiment ◽  
Hot Rolled ◽  
Made In ◽  
Rolled Tape

The paper presents a mathematical model for predicting the mechanical properties of hot rolled strips. The realization of this mathematical model relied on statistical measurements of the mechanical properties (Rm, Rp0,2 and A5) for the laminated strip in the LBC rolling mill from the Liberty Steel Galati steel plant. To achieve this mathematical model, there has been used the active experiment method.By means of this mathematical model, significant time and material savings can be made in the process of testing the mechanical properties for hot rolled tape.

scholarly journals Mathematical Modeling of the Cold Rolling Process and Heat Treatment for DC01 Steel

2021 ◽  
Vol 44 (2) ◽  
pp. 35-38
Author(s):  
Marian-Iulian NEACȘU
Keyword(s):  
Mechanical Properties ◽  
Mathematical Model ◽  
Steel Strip ◽  
Rolling Process ◽  
Recrystallization Annealing ◽  
Strip Rolling ◽  
Active Experiment ◽  
Cold Rolled ◽  
Cold Strip Rolling ◽  
Rolled Tape

The paper presents the elaboration of a mathematical model of the cold strip rolling process combined with the recrystallization annealing after the rolling at LBR Liberty Galati.The elaborated mathematical model allows the prediction of the mechanical properties of cold rolled strips subsequently subjected to a heat treatment.The realization of this mathematical model was based on statistical measurements of the mechanical properties Rm, Rp0.2 (Rc) and A5 for the rolled steel strip DC01 from Liberty Steel Galati. To achieve this mathematical model, the active experiment method was used.With the help of this mathematical model, it is possible to optimize the rolling process by significant savings of time and materials in the process of testing the mechanical properties for cold rolled tape, but also by choosing the most appropriate process parameters.

Features of mathematical modeling of wood-polymer composite sandy

10.12737/8462 ◽  
2015 ◽  
Vol 4 (4) ◽  
pp. 130-139
Author(s):  
Стародубцева ◽  
Tamara Starodubtseva ◽  
Аскомитный ◽  
Aleksey Askomitnyy
Keyword(s):  
Mathematical Modeling ◽  
Mechanical Properties ◽  
Mathematical Model ◽  
Initial Data ◽  
Algebraic Equations ◽  
Wood Polymer ◽  
Composite Interface ◽  
Input Form ◽  
The Mathematical Model ◽  
Wood Polymer Composite

This article describes a technique for modeling of wood polymer-sandy composite. Interface input form of initial data for modeling; differential equations underlying the mathematical model are presented. To solve the system of differential and algebraic equations computer program "Program to simulate the struc-ture and mechanical properties of wood polymer-sandy composite" is developed. The program, developed in the environment of Borland Delphi 7.0, programming language Object Pascal, is intended for modeling the mechanical behavior of wood polymer-sandy composite of given composition.

Surface Finish Enhancement of Hot-Rolled Strips on the 2000 Wide-Strip Rolling Mill Using Mathematical Modeling at Novolipetsk Steel

2019 ◽  
Vol 49 (10) ◽  
pp. 703-708 ◽  
Author(s):  
V. A. Pimenov ◽  
A. I. Dagman ◽  
A. K. Pogodaev ◽  
D. A. Kovalev ◽  
N. N. Zhovnodii
Keyword(s):  
Mathematical Modeling ◽  
Surface Finish ◽  
Rolling Mill ◽  
Strip Rolling ◽  
Wide Strip ◽  
Hot Rolled

A Technology for Producing Hot Rolled Product of Cold Heading Steel

2012 ◽  
Vol 184-185 ◽  
pp. 876-879
Author(s):  
Zhuang Li ◽  
Di Wu ◽  
Wei Lv
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Grain Size ◽  
Rolled Product ◽  
Rolling Mill ◽  
Low Carbon ◽  
Controlled Processing ◽  
Hot Rolling Mill ◽  
Hot Rolled ◽  
Ferrite Grain Size

In the present paper, thermomechanical controlled processing (TMCP) of low carbon cold heading steel was conducted by a laboratory hot rolling mill. The results have shown that the mechanical properties of the low carbon cold heading steel can be significantly improved by TMCP without heat treatment. The enhancement of the mechanical properties for the low carbon cold heading steel is attributed mainly to the finer ferrite grain size, and it is also related to the remaining dislocations within substructure of the cold heading steel after deformation. A technology is developed for producing hot rolled product of cold heading steel with improved mechanical properties. The technology has great significance because processing flow is simplified, and manufacture cost is decreased.

Forecasting Water Saturation of Fill Grounds in Urban Infrastructure Conditions by Mathematical Modeling Based on the Main Hydrophysical Characteristic

2018 ◽  
Vol 9 (3) ◽  
pp. 485
Author(s):  
Anna V. CHELOVECHKOVA ◽  
Irina V. KOMISSAROVA ◽  
Dmitry I. EREMIN
Keyword(s):  
Mathematical Modeling ◽  
Mechanical Properties ◽  
Mathematical Model ◽  
Granulometric Composition ◽  
Water Saturation ◽  
Physical And Mechanical Properties ◽  
Urban Infrastructure ◽  
Regression Equations ◽  
Wide Range ◽  
Software Product

A technique is proposed for forecasting water saturation of fill and undisturbed grounds used in construction when making a foundation. Dependencies are established between the content of individual granulometric fractions of grounds and their physico-mechanical properties. Reliable regression equations are obtained, which formed the basis of a mathematical model for predicting the water saturation of grounds. A software product has been developed, the work of which was tested using the example of the basic hydro-physical characteristics of the grounds differing in their properties (black earth and salt earth). The results obtained reliably prove the possibility of using the model and software product in a wide range of granulometric composition values and physical and mechanical properties of grounds.

scholarly journals The Influence of Segregation Bands and Hot Rolling on the Precipitation of Secondary Phases during Aging at 750 °C for Nickel Alloy 625

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 314
Author(s):  
Simon Malej ◽  
Jožef Medved ◽  
Barbara Šetina Batič ◽  
Franc Tehovnik ◽  
Franci Vode ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hot Rolling ◽  
Rolling Mill ◽  
Smooth Transition ◽  
Inconel 625 ◽  
Secondary Phases ◽  
High Concentration ◽  
Nickel Chromium ◽  
Hot Rolling Mill ◽  
Hot Rolled

For Inconel 625, where the γ” and δ phases precipitate, the influence of prior hot rolling on the process is not well covered. The influence of segregation bands and prior hot rolling on the precipitation of secondary phases during aging at 750 °C for different times was investigated. Prior hot-rolling was conducted on a hot rolling mill at 1050 °C and 1150 °C with three different deformation levels. The hot rolled samples were aged at 750 °C for 1, 5, 25 and 125 h. The γ″ precipitated in both the deformed and recrystallized grains in the segregation bands containing a high concentration of niobium and molybdenum and a lower concentration of nickel, chromium and iron. The opposite was observed between the segregation bands where no γ″ precipitate was found. There was a smooth transition in the density and the size of the γ″ particles in the deformed grains at the border of the segregation bands, while a more complex transition occurred in the recrystallized grains. This occurred in the area where the average niobium concentration decreased from 4.5 to 2.7 wt. %, which influenced the mechanical properties.

scholarly journals MATHEMATICAL MODELING OF THE SYNCHRONOUS MAIN DRIVE MOTOR OF THE HOT-ROLLED MILL 2800

2021 ◽  
Vol 7 (3(39)) ◽  
pp. 39-44
Author(s):  
Alexander Vladimirovich Starikov ◽  
Viktor Alexandrovich Kirdyashev ◽  
Vasily Ivanovich Kozyrev
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Dynamic Characteristics ◽  
Synchronous Motor ◽  
Drive Motor ◽  
Hot Rolled ◽  
The Mathematical Model

This article discusses the calculation of the parameters of the mathematical model and the dynamic characteristics of a synchronous motor for the main drive of a hot-rolled mill 2800.

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