Study Regarding Process of the Electrical Discharge Machining with Magnetic Activation of the Welded Joints of some Materials High Alloy Steel

2021 ◽  
Vol 890 ◽  
pp. 141-146
Author(s):  
Mihail Aurel Țîțu ◽  
Dumitru Mnerie ◽  
Diana Cristina Dragomir ◽  
Gabriela Victoria Mnerie

The scientific paper presents an extensive research on modeling and optimizing the technological parameters of the process for processing by processing electric discharges with massive electrode with and without magnetic activation. Scientific research is based on real data collected from the process of electrical discharges performed on various samples extracted from areas of welded joints of metal components made of high alloy steel. The processing of experimental data was performed both classically and actively, especially the method of the central factorial experiment composed of orthogonal and rotary. The process parameters that were initially modeled and subsequently optimized were based on a series of independent variables characteristic of dimensional processing by copying the shape of the electrical discharge processing. Subsequent research conclusions and directions, as well as original contributions, are an experimentally validated point of view and worthy of consideration. All these fundamental ideas highlighted above find their explanations and the corresponding explicit treatment in the content of this scientific paper that addresses both managers at all levels and researchers.

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5257
Author(s):  
Aurel Mihail Țîțu ◽  
Petrică Vizureanu ◽  
Ștefan Țîțu ◽  
Andrei Victor Sandu ◽  
Alina Bianca Pop ◽  
...  

The scientific paper presents practical research carried out by a mixed team of Romanian researchers from universities and the business environment. The research consists in applying the process of cutting metallic materials through electrical discharge machining with contact breaking using a metal band as a transfer object. The research was implemented with the help of a specially designed installation in the laboratory and subsequently all the necessary steps were taken to obtain the patent for it. Various metallic materials were cut using this process, but first of all, high alloy steels. In the global research conducted by the authors, active experimental programs and classic experimental programs were used. The composite central factorial experiment was the method that led to the most effective results in terms of interpretations and conclusions. The research as a whole includes unique elements from an engineering point of view and here we can highlight the use of a metal band as a transfer object for this type of process as well as the designed, realized, and subsequently patented installation.


Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 471
Author(s):  
Josef Odehnal ◽  
Pavel Ludvík ◽  
Tomáš Studecký ◽  
Pavel Michálek

The presented work is aimed at developing a mould geometry suitable for casting both low- and high-alloy steel grades into 500 kg experimental ingots. The high Height-to-Diameter (H/D)-ratio mould currently used in COMTES FHT Inc. served as a reference and for finite element method simulations (FEM) of the filling and solidification process. The optimized mould geometry, balancing the porosity and segregations, was determined using MAGMA software. Four different steel grades were defined for the simulation. Case studies were carried out for 34CrNiMo6 (W.Nr. 1.6582), DHQ8, CB2 and borated stainless steel grades ranging from low-alloy steel to high-alloy steel. Extended user-defined criteria and verified boundary conditions were used to predict the formation of A-segregations in cast steel. Both primary (PDAS) and secondary (SDAS) arm spacings were modelled as well. The optimized mould shape and the casting assembly were designed based on the simulation results.


1998 ◽  
Vol 40 (6) ◽  
pp. 250-253
Author(s):  
V. M. Kondratenko ◽  
A. K. Tikhonov ◽  
I. N. Blagova ◽  
S. S. Kazakov ◽  
E. A. Pargamonov ◽  
...  

2019 ◽  
Vol 34 (15) ◽  
pp. 2695-2704
Author(s):  
Xiaoli Zhao ◽  
Lizhan Han ◽  
Chuanwei Li ◽  
Jianfeng Gu

Abstract


Metallurgist ◽  
2019 ◽  
Vol 63 (1-2) ◽  
pp. 156-162
Author(s):  
A. S. Tyuftyaev ◽  
M. Kh. Gadzhiev ◽  
M. V. Il’ichev ◽  
M. A. Khromov ◽  
G. A. Filippov

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