scholarly journals Study of the influence of the increased carbon content in electrodes on structure and properties of the welding seam during welding of 110G13 steel

2021 ◽  
Vol 4 (3(60)) ◽  
pp. 14-17
Author(s):  
Volodymyr Pashynskyi ◽  
Igor Boyko
Keyword(s):  
Carbon Steel ◽  
Weld Metal ◽  
Carbon Content ◽  
Weld Pool ◽  
High Carbon Steel ◽  
Carbon Steels ◽  
Structure And Properties ◽  
High Carbon ◽  
Electrode Coating ◽  
Effective Measure

The object of research is the effect of the carbon-forming component of coated electrodes for welding and surfacing of Gadfield steel (110G13L and analogs) on the structure and properties of the weld. One of the most problematic areas in the welding and surfacing of high-carbon steel is the high irregularity of the rod and coating melting rates. Therefore, the non-melted part of the coating is literally poured into the weld pool, which leads to significant chemical and structural inhomogeneity of the welded metal. The main hypothesis of the study is the assumption that it is possible to increase the homogeneity of the deposited metal by changing the conditions for the transition of carbon from the electrode to the weld pool by using an electrode rod made of carbon steel. In the course of the study, electrode rods with different carbon contents were used. With an increase in the carbon content in the composition of the electrode rod, the fluidity of the drops increased, which contributed to a decrease in the strength of the welding current without harm to the welding and technological characteristics. This allows to reduce the generation of heat in the base metal, that is an effective measure to prevent hot cracks in the weld metal and heat affected zone Studies of the composition of the electrode metal droplets and the weld material showed that with an increase in the carbon content in the electrode rod from 0.08 % to 0.8 %, the carbon content in the droplets increases from 0.3 % to 0.97 %. The carbon content in the weld metal is 1.1 %. The assimilation of manganese by a drop increases with an increasing of coating and the droplet interaction time. A significant increasing in the rate of coating melting was obtained. This is due to the fact that the concomitant decrease in the content of graphite in the coating contributes to a decrease in the refractoriness of the electrode coating. The use of high carbon steels for the manufacturing of electrode rods for welding and surfacing of Gadfield steel improves the properties of the welded metal and sanitary and hygienic parameters.

Study of TiC Interaction and its Reaction Products with the Different Carbon Content Steels

2020 ◽  
Vol 975 ◽  
pp. 59-64
Author(s):  
Andrey N. Anikeev ◽  
Ilia V. Chumanov ◽  
Vadim Sedukhin
Keyword(s):  
High Temperature ◽  
Carbon Steel ◽  
Titanium Carbide ◽  
Carbon Content ◽  
Thermodynamic Modeling ◽  
High Carbon Steel ◽  
Reaction Products ◽  
High Carbon ◽  
Scanning Microscope ◽  
Interaction Processes

Study of TiC interaction with low-and high-carbon steel is presented in this article. Was carried out interaction thermodynamic modeling in the temperature range of 900-1800 °C, which showed that titanium carbide would dissolve in melts with these compositions, regardless of melt’s carbon content at given parameters. The obtained thermodynamic results were verified by conducting an experiment with high-temperature complex in order to study substances interaction processes. The obtained experimental samples were studied with scanning microscope as well as structure and compounds composition, obtained as a result of experiment mentioned above.

Deformation and Structure Difference of Steel Droplets during Initial Solidification

2017 ◽  
Vol 36 (4) ◽  
pp. 347-357 ◽  
Author(s):  
Yang Li ◽  
Jing Wang ◽  
Jiaquan Zhang ◽  
Changgui Cheng ◽  
Zhi Zeng
Keyword(s):  
Carbon Steel ◽  
Continuous Casting ◽  
High Carbon Steel ◽  
Low Carbon Steel ◽  
Carbon Steels ◽  
Solidification Structure ◽  
Low Carbon ◽  
High Carbon ◽  
Peritectic Steel ◽  
Initial Solidification

AbstractThe surface quality of slabs is closely related with the initial solidification at very first seconds of molten steel near meniscus in mold during continuous casting. The solidification, structure, and free deformation for given steels have been investigated in droplet experiments by aid of Laser Scanning Confocal Microscope. It is observed that the appearances of solidified shells for high carbon steels and some hyper-peritectic steels with high carbon content show lamellar, while that for other steels show spherical. Convex is formed along the chilling direction for most steels, besides some occasions that concave is formed for high carbon steel at times. The deformation degree decreases gradually in order of hypo-peritectic steel, ultra-low carbon steel, hyper-peritectic steel, low carbon steel, and high carbon steel, which is consistent with the solidification shrinkage in macroscope during continuous casting. Additionally, the microstructure of solidified shell of hypo-peritectic steel is bainite, while that of hyper-peritectic steel is martensite.

Crucible Steel in South India-Preliminary Investigations on Crucibles from Some Newly Identified Sites

1996 ◽  
Vol 462 ◽  
Author(s):  
Sharada Srinivasan
Keyword(s):  
Carbon Steel ◽  
Tamil Nadu ◽  
High Carbon Steel ◽  
Carbon Steels ◽  
Low Carbon ◽  
High Carbon ◽  
Metal Mining ◽  
Hypereutectoid Steel ◽  
Iron And Steel ◽  
Crucible Steel

ABSTRACTEuropean accounts from the 17th century onwards have referred to the repute and manufacture of “wootz’, a traditional crucible steel made especially in parts of southern India in the former provinces of Golconda, Mysore and Salem. Pliny's Natural History mentions the import of iron and steel from the Seres which have been thought to refer to the ancient southern Indian kingdom of the Cheras. As yet the scale of excavations and surface surveys is too limited to link the literary accounts to archaeometallurgical evidence, although pioneering exploratory investigations have been made by scholars, especially on the pre-industrial production sites of Konasamudram and Gatihosahalli discussed in 18th-19th century European accounts. In 1991–2 during preliminary surveys of ancient base metal mining sites, Srinivasan came across unreported dumps with crucible fragments at Mel-Siruvalur in Tamil Nadu, and Tintini and Machnur in Karnataka and she collected surface specimens from these sites as well as from the known site of Gatihosahalli. She was also given crucible fragments by the Tamil University, Tanjavur, from an excavated megalithic site at Kodumanal, dated to ca 2nd c. Bc, mentioned in Tamil Sangam literature (ca 3rd c. BC-3rd c. AD), and very near Karur, the ancient capital of the Sangam Cheras. Analyses of crucible fragments from the surface collection at Mel-Siruvalur showed several iron prills with a uniform pearlitic structure of high-carbon hypereutectoid steel (∼1–1.5% C) suggesting that the end product was uniformly a high-carbon steel of a structure consistent with those of high-carbon steels used successfully to experimentally replicate the watered steel patterns on ‘Damascus’ swords. Investigations indicate that the process was of carburisation of molten low carbon iron (m.p. 1400° C) in crucibles packed with carbonaceous matter. The fabric of crucibles from all the above mentioned sites appears similar. Preliminary investigations on these crucibles are thus reported to establish their relationship to crucible production of carbon steel and to thereby extend the known horizons of this technology further.

Friction Hydro-Pillar Processing of a High Carbon Steel: Joint Structure and Properties

2018 ◽  
Vol 49 (2) ◽  
pp. 699-708 ◽  
Author(s):  
Luis Fernando Kanan ◽  
Buchibabu Vicharapu ◽  
Antonio Fernando Burkert Bueno ◽  
Thomas Clarke ◽  
Amitava De
Keyword(s):  
Carbon Steel ◽  
High Carbon Steel ◽  
Structure And Properties ◽  
High Carbon ◽  
Steel Joint ◽  
Joint Structure

Optimum Carbon Content for Tempered Martensitic Steels

1968 ◽  
Vol 90 (1) ◽  
pp. 1-7 ◽  
Author(s):  
J. D. Lubahn ◽  
H. P. Chu
Keyword(s):  
Carbon Steel ◽  
Carbon Content ◽  
High Carbon Steel ◽  
Low Carbon Steel ◽  
Tensile Tests ◽  
Notch Toughness ◽  
Low Carbon ◽  
Martensitic Steels ◽  
High Carbon ◽  
Engineering Concept

Notch-tensile tests were conducted on four quenched and tempered steels to study the effect of carbon content on notch toughness. The toughness was found to decrease when the carbon content was either above or below an optimum value of about 0.35 to 0.40 percent. The general engineering concept which prefers a low-carbon steel to a high-carbon steel for better toughness is briefly discussed in view of the present and previous experimental results.

scholarly journals Investigating the cooling rate of cane molasses as quenching medium for 0.61% C high carbon steels

10.30544/139 ◽  
2016 ◽  
Vol 22 (1) ◽  
pp. 39-50 ◽  
Author(s):  
M. R. Dodo ◽  
E. T Dauda ◽  
M. A. Adamu
Keyword(s):  
Carbon Steel ◽  
Cooling Rate ◽  
High Carbon Steel ◽  
Good Alternative ◽  
Carbon Steels ◽  
Engine Oil ◽  
Test Results ◽  
High Carbon ◽  
Cane Molasses ◽  
Quenching Medium

The effect of cooling rate of cane molasses as quenching medium for 0.61% C high carbon steels was investigated. Samples of high carbon steel were spheroidized annealed and then machined prior to the hardening process. Molasses solution of viscosity equals to that of engine oil was prepared by adding water. The samples were normalized and then austenitised at 800oC and soaked for 40 minutes and then quenched in water, engine oil, raw molasses and the prepared molasses solution. Cooling rate curves of all the quenching media used were developed. The highest cooling rate of 60oC/s was attained by the prepared molasses solution. Hardness of the test samples was evaluated. The test results obtained show that the highest hardness value (525 HVN) was obtained from the sample quenched in the prepared molasses solution. Microstructures of the various samples were analyzed using OM and SEM. In all the tests samples martensite structure was observed. It was observed that the prepared molasses solution has higher severity of quenching than that of engine oil but lower than that of water. The research showed that cane molasses can harden high carbon steel without cracking the component in the same way as engine oil, hence, molasses could be a very good alternative to engine oil for use as quenching medium.

Structure and properties of high-carbon steel cast pellets

2011 ◽  
Vol 53 (1-2) ◽  
pp. 57-60 ◽  
Author(s):  
S. V. Grachev ◽  
O. V. Zhuikov ◽  
V. P. Gvozdovskii ◽  
E. S. Matsneva ◽  
D. I. Vichuzhanin
Keyword(s):  
Carbon Steel ◽  
High Carbon Steel ◽  
Structure And Properties ◽  
High Carbon ◽  
Steel Cast

Investigation of Lath and Plate Martensite in a Carbon Steel

2011 ◽  
Vol 172-174 ◽  
pp. 61-66 ◽  
Author(s):  
Albin Stormvinter ◽  
Annika Borgenstam ◽  
Peter Hedström
Keyword(s):  
Carbon Steel ◽  
Carbon Content ◽  
Morphological Change ◽  
Retained Austenite ◽  
Alloy Composition ◽  
Lath Martensite ◽  
Carbon Steels ◽  
Plate Martensite ◽  
High Carbon ◽  
Martensite Microstructure

Martensite in carbon steels forms in different morphologies, often referred to as lath andplate martensite. The alloy composition has a strong effect on the morphology, for instance in car-bon steels there is a morphological change of the martensite microstructure from lath martensite atlow carbon contents to plate martensite at high carbon contents. In the present work a decarburizedhigh-carbon steel, enabling the isolation of carbons' influence alone, has been studied in order to in-vestigate the changes in morphology and hardness. From the results it is concluded that there is acontinuous change of hardness with increased carbon content. The increasing hardness slows down atabout 0.6 wt%C before decreasing at higher carbon contents. This is in accordance with the change inmorphology since it was found that lath martensite dominates below 0.6 wt%C and the first units ofgrain boundary martensite and plate martensite appear above 0.6 wt%C. At high carbon contents thedominating morphology is plate martensite, but retained austenite is also present.

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