Checking Surface Contamination and Determination of Electrical Resistivity of Oxide Scale Deposited on Low Carbon Steel by DC Potential Drop Method

The method and results of the study of reverse extrusion of billet by cylindrical punch in a conical expanding matrix are described. The mathematical model, which we developed for the determination of specific extrusion force, is described too. The study by statistical method verified the adequacy of the model. This model made possible to assess the resistance of punches and showed the ability to produce deformation of a billet made of low carbon steel without heating. The developed process includes the operation of segmenting of the cylindrical workpieces from bar, heat treatment, lubrication and extrusion of the workpieces. The two-way cold extrusion of a billet is produced in a matrix alternatively by two punches. The design of the stamp is described. The stamp is specialized for reverse extrusion of a billet. In its construction the moving mechanism of action of the two alternately punches in one matrix is used.

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Precipitation Behavior of Magnetite in Oxide Scale during Cooling of Microalloyed Low Carbon Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.572.249 ◽

2012 ◽

Vol 572 ◽

pp. 249-254 ◽

Cited By ~ 9

Author(s):

Xiang Long Yu ◽

Zheng Yi Jiang ◽

Dai Jun Yang ◽

Dong Bin Wei ◽

Quan Yang

Keyword(s):

Carbon Steel ◽

Oxide Scale ◽

Steel Substrate ◽

Low Carbon Steel ◽

Precipitation Process ◽

Low Carbon ◽

Precipitation Behavior ◽

Magnetite Particles ◽

And Migration ◽

The Stability

Precipitation behavior of magnetite particles in the thermal grown oxide scale during isothermal cooling of microalloyed low carbon steel was studied using scanning electron microscopy (SEM) and thin film X-ray. The oxide scale was generated from Gleeble 3500 Thermal Mechanical Simulator connected with a humid air generator, to simulate 550 and 450C isothermal treatments. Several types of magnetite precipitates were observed during different cooling processes with respect to the possible mechanisms of precipitation have been discussed. It is found that magnetite particles is as a result of pro-eutectoid precipitation from oxygen-rich wustite, and also as a product of the partial decomposition of wustite during the cooling process due to change of oxygen concentration and migration of iron ions. Furthermore, microalloyed elements in steel reduce the stability of wustite thereby facilitate the precipitation process, whose products of multi-phase oxide finally determine the adhesive strength of oxide scale and steel substrate.

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Mechanical properties and phases determination of low carbon steel oxide scales formed at 1200°C in air

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2015.10.028 ◽

2015 ◽

Vol 282 ◽

pp. 155-162 ◽

Cited By ~ 12

Author(s):

O.A. Zambrano ◽

J.J. Coronado ◽

S.A. Rodríguez

Keyword(s):

Mechanical Properties ◽

Carbon Steel ◽

Low Carbon Steel ◽

Oxide Scales ◽

Low Carbon

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Influence of cooling rate on the structure and formation of oxide scale in low carbon steel wire rods during hot rolling

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2005.12.014 ◽

2006 ◽

Vol 201 (3-4) ◽

pp. 526-532 ◽

Cited By ~ 30

Author(s):

R. Bhattacharya ◽

G. Jha ◽

S. Kundu ◽

R. Shankar ◽

N. Gope

Keyword(s):

Carbon Steel ◽

Oxide Scale ◽

Cooling Rate ◽

Hot Rolling ◽

Steel Wire ◽

Low Carbon Steel ◽

Low Carbon

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Texture of Oxide Scales during Hot Rolling of Low Carbon Steel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.495-497.339 ◽

2005 ◽

Vol 495-497 ◽

pp. 339-344 ◽

Cited By ~ 1

Author(s):

Vladimir V. Basabe ◽

Jerzy A. Szpunar

Keyword(s):

Carbon Steel ◽

Oxide Scale ◽

Hot Rolling ◽

Low Carbon Steel ◽

Cube Texture ◽

Experimental Results ◽

Oxide Scales ◽

Low Carbon ◽

Air Velocity ◽

Temperature Range

The textures of oxide scales grown on low carbon steel in air over the temperature range 850-950°C were investigated. The low carbon steel was oxidized with the air velocity of 4.2 cm/s for 10 s in order to approximate the formation of tertiary scales in hot rolling. At 850°C, the wüstite texture and magnetite texture are weak with no dominant components. For the temperatures of 900 and 950°C, the wüstite and magnetite phases have a cube texture {001}<100>. The experimental results indicate that during hot rolling in the g region, the texture of the oxide scale is cubic and when rolling in the a region, the texture of the oxide scale is weak with no dominant components.

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The Variation Effect of Electric Current Toward Tensile Strength on Low Carbon Steel Welding with Electrode E7018

Teknomekanik ◽

10.24036/tm.v3i1.5572 ◽

2020 ◽

Vol 3 (1) ◽

pp. 9-16

Author(s):

Muhammad Agung Pratomo ◽

Jasman Jasman ◽

Nelvi Erizon ◽

Yolli Fernanda

Keyword(s):

Tensile Strength ◽

Carbon Steel ◽

Low Carbon Steel ◽

High Current ◽

Low Carbon ◽

Polarity Determination ◽

Good Penetration ◽

Electric Polarity ◽

Selection Of

The strength of the welding result is strongly influenced by several factors, one of which is the selection of high current. This study aims to determine the effect of high current of welding on the strength of low carbon steel welding joints. The process of welding the material uses the open V seam connection type. The variations of the high current used were 80 A, 100 A and 130 A. The specimen used was a carbon steel plate with code of 1.0038 with thickness of 8 mm and the electrode used was the E7018 electrode with diameter of 3.2 mm. The strength of the welding results is influenced by arc voltage, amount of current, welding speed, amount of penetration and electric polarity. Determination of the amount of current in metal joints using arc welding affects the work efficiency and welding materials. Based on the research, it was found that welding using high current of 100 ampere produced the highest tensile strength value of all test specimens that were given welding treatment and good penetration results.

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