scholarly journals Determining the processing modes of the low carbon steel by high-precision plasma cutting based on dimensionless complexes

2019 ◽  
Vol 297 ◽  
pp. 01007
Author(s):  
Aleksandr Loktionov ◽  
Nadezhda Gaar ◽  
and Аndrey Rakhimyanov
Keyword(s):  
Carbon Steel ◽  
High Precision ◽  
Sheet Material ◽  
Cutting Speed ◽  
Low Carbon Steel ◽  
Plasma Cutting ◽  
Low Carbon ◽  
Processed Material ◽  
Processing Modes ◽  
Steel St3

The results of the investigations on determining the processing modes during high-precision plasma cutting of low carbon steel based on the values of Peclet number and dimensionless power which provide the minimal value of deviation of the cut sides from perpendicularity are presented in the paper. The conditions of obtaining the cut of high quality from the viewpoint of minimizing the cut side deviation from perpendicularity are determined by cutting low carbon steel. The dependences of the cutting speed and the cut width on the processed material thickness, intended to determine the processing modes and adjustment of the linear dimensions are established. The investigations were made on the device of the thermal cutting “Termit PPl” based on the installation of the high-precision plasma cutting HiFocus 130i of Kjellberg firm by using the HiFocusplus technology. Low carbon construction steel St3 was chosen as an investigated material. The thickness of the sheet material constituted 4 mm, 6 mm, 10 mm, 16 mm and 20 mm.

scholarly journals Technological possibilities of high-precision plasma cutting in processing materials of different class

2018 ◽  
Vol 224 ◽  
pp. 01011 ◽  
Author(s):  
Andrey Rakhimyanov ◽  
Alexander Loktionov ◽  
Nadezhda Gaar
Keyword(s):  
Carbon Steel ◽  
High Precision ◽  
Low Carbon Steel ◽  
Production Costs ◽  
Plasma Cutting ◽  
Low Carbon ◽  
Technological Production ◽  
St3 Steel ◽  
Steel St3

Improving the technologies and equipment at a stage of the blank production in mechanical engineering greatly determines the reduction in the technological production costs. The use of modern technological complexes on cutting sheet materials provides a solution to tasks for increasing the accuracy of forming. Nowadays high-precision plasma cutting is developing. It can be considered as an alternative to the laser cutting in achieving high characteristics of the cut accuracy and quality. The paper under consideration presents the results of optimizing the processing speed for the existing schemes of high-precision plasma cutting in the range of the cut thickness from 1 mm to 30 mm for carbon steel, alloy steel and aluminum steel. The efficiency of using the technological scheme HiFocusplus for cutting such bimetallic compositions as “steel St3 + steel 12H18N10T”, “steel St3 + aluminum A5M”, “steel St3 + copper M1” is presented. It is determined that the best characteristics of the accuracy and quality of the cut are achieved in cutting the composition “steel ST3 + steel 12H18N10T” from the side of low-carbon steel. Cutting from the side of aluminum and copper respectively is optimal for such compositions as “steel St3 + aluminum A5M” and “steel St3 + copper M1”.

The Influence of Dislocation Structure and Intergranular Boundaries on the Character of Fracture in the Low Carbon Steel St3

1996 ◽  
Vol 207-209 ◽  
pp. 685-688 ◽  
Author(s):  
N.K. Tsenev ◽  
I.R. Kuzeev ◽  
Alex V. Baryshev ◽  
A.M. Gallyamov ◽  
B.E. Selsky
Keyword(s):  
Carbon Steel ◽  
Dislocation Structure ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Character Of Fracture ◽  
Steel St3

Improvement of Chip Breaking in Machining Low Carbon Steel by Cryogenically Precooling the Workpiece

1998 ◽  
Vol 120 (1) ◽  
pp. 76-83 ◽  
Author(s):  
Y. Ding ◽  
S. Y. Hong
Keyword(s):  
Carbon Steel ◽  
Cutting Speed ◽  
Low Carbon Steel ◽  
Machining Process ◽  
Low Carbon ◽  
Ductile Materials ◽  
Chip Breaking ◽  
Brittle Ductile Transition ◽  
Element Simulation ◽  
Embrittlement Temperature

Ductile materials such as AISI1008 low carbon steel characteristically exhibit poor chip breaking in conventional machining practices. This paper presents an environmentally clean cryogenic machining process which improves the breakability of AISI1008 chips by lowering the chip temperature to its embrittlement temperature. In this study, the brittle-ductile transition temperature of AISI1008 was experimentally determined to be between −60°C and −120°C. The discussion is focused on whether the chip can reach the embrittlement temperature before it hits an obstacle. A finite element simulation predicted the chip temperatures under various cutting conditions. Liquid nitrogen (LN2) was used to prechill the workpiece cryogenically. The results from the cutting tests indicate a significant improvement in chip breakability for different feeds and speeds by using this cooling technique. However, the effectiveness of cryogenetically prechilling the workpiece was found to be heavily dependent on cutting speed.

scholarly journals The Effect of Surface Roughness of Low Carbon Steel by Heat Treatment in Turning Operation

2020 ◽  
Author(s):  
Abdullah Tariq AL-Malki ◽  
Basim Khidhir
Keyword(s):  
Heat Treatment ◽  
Surface Roughness ◽  
Carbon Steel ◽  
Feed Rate ◽  
Cutting Speed ◽  
Low Carbon Steel ◽  
Depth Of Cut ◽  
Heating Process ◽  
Low Carbon ◽  
Turning Operation

This research focuses on enhancing the surface roughness of low carbon steel by heat treatment of low carbon steel in turning operation. Heat treatment is mainly used to improve the mechanical properties of materials. Two sets of specimens used during the experiment where each has 5 pieces of mild steel that heat-treated of two-level of temperatures of 650 oC and 900oC. After the heating process of all specimens, it will be exposed to different coolant media which are quenching, normalizing and annealing. A carbide single-point tool, one level of cutting parameters selected as one level of cutting speed and depth of cut and two levels of feed rate used during this research. The results show that specimen quenched by oil bath measures the highest value of the surface roughness of 8.26 µm at 900oC and machined with a feed rate of 0.113 mm. While quenched water specimens show less surface roughness of 4.91µm at 650oC in the same feed rate.

scholarly journals CORROSION PROTECTION OF LOW-CARBON STEEL IN ACIDIC MEDIA BY INHIBITORS OF SOLING SERIES

2018 ◽  
Vol 59 (2) ◽  
pp. 70 ◽  
Author(s):  
Ivan A. Menshikov ◽  
Anatoliy B. Shein
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Electrochemical Behavior ◽  
Low Carbon Steel ◽  
Electrochemical Reactions ◽  
Low Carbon ◽  
Acidic Media ◽  
Acidic Solutions ◽  
Kinetics Of ◽  
Steel St3

Results of investigation of the action of the series of inhibitors SolIng on the corrosion and electrochemical behavior of low-carbon steel St3 in acidic solutions by the weight-loss and polarization methods were presented. The influence of the inhibitors on the kinetics of the partial electrochemical reactions was determined.

scholarly journals INVESTIGATION OF SOME COMPOSITIONS OF THE «SOLING» SERIES AS CORROSION INHIBITORS FOR LOW-CARBON STEEL IN ACIDIC MEDIA

2021 ◽  
Vol 11 (4) ◽  
pp. 254-262
Author(s):  
A. S. Kalinina ◽  
◽  
I. S. Polkovnikov ◽  
A. B. Shein ◽  
◽  
...  
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibitors ◽  
High Efficiency ◽  
Protective Action ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Acidic Media ◽  
Inhibiting Effect ◽  
Kinetics Of ◽  
Steel St3

The inhibiting effect of some compositions of «Soling» series on low-carbon steel St3 in solutions of 5% and 15% HCl and 5% H2SO4 has been studied by the methods of polarization and gravimetric measurements. The protective action and the coefficient of inhibition of the corrosion process are calculated, the slopes of the Tafel sections in the cathode and anode regions of the polarization curves have been calculated. The influence of inhibitors on the kinetics of partial electrochemical reactions has been determined. The state of the surface of the samples has been estimated using micrographs. The high efficiency of inhibitors in acidic media has been shown.

Development of trimming technology for hot rolled ultra-low carbon steel

1993 ◽  
Vol 90 (7-8) ◽  
pp. 917-922
Author(s):  
Y. Matsuda ◽  
M. Nishino ◽  
J. Ikeda
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Ultra Low Carbon Steel ◽  
Hot Rolled
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