Application of the Complete Material Balance Method to Estimate the Composition of Weld Metal in Manual Arc Welding

2017 ◽  
Vol 265 ◽  
pp. 762-766 ◽  
Author(s):  
E.B. Votinova ◽  
M.P. Shalimov
Keyword(s):  
Weld Metal ◽  
Arc Welding ◽  
Slag Phase ◽  
Material Balance ◽  
Equation System ◽  
The Third ◽  
Manual Arc Welding ◽  
Material Balance Method ◽  
The Mathematical Model ◽  
Coated Electrodes

The article addresses the mathematical model of manual arc welding with coated electrodes, based on complete material balance, the model is a three equation system. The first equation describes the interaction between average and partial transition coefficients; the second equation shows the transition of an element from the metal phase; the third one characterizes the reduction of an element from the slag phase. The results of modeling for base and rutile electrode are given. The convergence of experimental data and calculations is shown. The regressionequations to calculate the parameters required for forecasting the composition of overlaying metal and weld metal in manual arc welding are listed.

Appication of the Complete Material Balance Method to Estimate the Transition of Elements in Flux Cored Arc Welding

2020 ◽  
Vol 299 ◽  
pp. 559-564 ◽  
Author(s):  
M.P. Shalimov ◽  
E.B. Votinova
Keyword(s):  
Comparative Analysis ◽  
Weld Metal ◽  
Mathematical Models ◽  
Arc Welding ◽  
Material Balance ◽  
Cored Wire ◽  
Flux Cored Arc Welding ◽  
Manual Arc Welding ◽  
Material Balance Method ◽  
Coated Electrodes

The paper addresses mathematical models of element transition into overlaying metal and weld metal in different methods of arc welding: stir welding, welding taking account the transition coefficients, empirical, kinetic, and thermodynamic welding. Their comparative analysis is made, their advantages, disadvantages, as well as various applications, are demonstrated. The approach to creation of mathematical models of manual arc welding with coated electrodes and flux cored wire, based on the method of complete material balance, is grounded.

scholarly journals The Effect of Wet Underwater Welding on Cold Cracking Susceptibility of Duplex Stainless Steel

2016 ◽  
Vol 16 (2) ◽  
pp. 68-77 ◽  
Author(s):  
J. Łabanowski ◽  
K. Prokop-Strzelczyńska ◽  
G. Rogalski ◽  
D. Fydrych
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Arc Welding ◽  
Hardness Test ◽  
Weldability Tests ◽  
Underwater Welding ◽  
Content Assessment ◽  
Nondestructive Tests ◽  
Manual Arc Welding ◽  
Coated Electrodes

Abstract The present work was conducted to assess the weldability of duplex stainless steel in underwater conditions. Metal manual arc welding (MMA) with the use of coated electrodes was used in the investigations. Tekken weldability tests were performed underwater at 0.5 m depth and in the air. Nondestructive tests, metallographic examinations of welds, ferrite content assessment in microstructure and hardness test were performed. The good weldability at underwater conditions of duplex stainless with the use of MMA method was confirmed, however difficulties in stable arc burning were revealed.

The mathematical modelling of corrosion in hot dip galvanized steel reinforced concrete

2011 ◽  
Vol 2 (1) ◽  
pp. 1-12
Author(s):  
A. Hegyi ◽  
H. Vermeşan ◽  
V. Rus
Keyword(s):  
Mathematical Model ◽  
Reinforced Concrete ◽  
Numerical Model ◽  
Equation System ◽  
Galvanized Steel ◽  
Steel Reinforced Concrete ◽  
Numeric Model ◽  
Physical And Mathematical Models ◽  
Physical Phenomena ◽  
The Mathematical Model

Abstract In this paper we wish to present the numerical model elaborated in order to simulate some physical phenomena that influence the general deterioration of steel, whether hot dip galvanized or not, in reinforced concrete. We describe the physical and mathematical models, establishing the corresponding equation system, the initial and boundary conditions. We have also presented the numeric model associated to the mathematical model and the numeric methods of discretization and solution of the differential equations system that describes the mathematical model.

The Determination of Noxes Emissions in Case of Manual Arc Welding Process with Coated Electrode

2018 ◽  
Vol 69 (7) ◽  
pp. 1826-1829
Author(s):  
Claudiu Babis ◽  
Augustin Semenescu ◽  
Oana Roxana Chivu ◽  
Maria Alina Gligor ◽  
Gabriel Iacobescu ◽  
...  
Keyword(s):  
Production System ◽  
Arc Welding ◽  
Welding Process ◽  
Practical Method ◽  
Machine Building ◽  
Short Exposure ◽  
Metal Bath ◽  
Coated Electrode ◽  
Manual Arc Welding ◽  
Arc Welding Process

The occupational risk assessment of a machine building company must cover each activity and workstation, taking into account each component of the production system (work system), each workload, work equipment and the work environment. This assessment is an extremely complicated and complex issue since the production system of such an enterprise is particularly complex and complicated. Welding assembly is a highly polluting technology process, especially of the atmosphere and soil. The formation of gases in the welding process is the result of burning of the electrodes, powders, forming the molten metal bath and making the weld seam. Welding operators are exposed to smoke and toxic gases resulting from the welding process, which can in many cases be hazardous to health. Many acute intoxications that may be caused by excessive exposure to or short exposure to smoke and gas resulting from the welding process have been studied over time. In the paper are presented the elements of risk related to the welding process and the most widespread occupational diseases that can occur in the ranges of the welding operators. The following are presented the noxious emissions from welding and are determined by a practical method the emission of noxious at welding deposition of a welding sample, using the manual arc welding process with coated electrode.

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