Technological Properties and Applications of High-Carbon Nanobainitic Steels

Węglowski, M. S.; Marcisz, J.; Garbarz, B.

doi:10.17729/ebis.2018.3/3

Cited by 5 publications

(4 citation statements)

References 26 publications

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“…Their tensile strength reaches 2.5 GPa with hardness in the range of 600-700 HV and elongation in the range of 5%-30%. [4][5][6][7][8] Nanobainite is also characterised by better wear resistance to abrasive wear compared to tempered martensite and bottom bainite with comparable or higher hardness. Due to the possibility of avoiding the separation of carbides, which cause embrittlement of the steel, and the very favourable combination of mechanical and functional properties, nanobainitic steels with Si are considered a very promising material.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the possibility of avoiding the separation of carbides, which cause embrittlement of the steel, and the very favourable combination of mechanical and functional properties, nanobainitic steels with Si are considered a very promising material. [1][2][3][4][5][6][7][8] However, sometimes in order to achieve the required results, it is necessary to initially obtain a surface with adequate hardness, higher than that of the nanobainitic steel itself. Hence, the need to use surface hardening methods to raise the hardness of the surface layer.…”

Section: Introductionmentioning

confidence: 99%

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Electron beam hardening of nanobainitic steel

Śliwiński,

Węglowski,

Wieczorek

et al. 2024

Surface Engineering

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Nanobainitic steels with high Si content are very promising materials due to the very favourable combination of mechanical and functional properties. However, sometimes in order to achieve the required results, it is necessary to further increase the surface's layer hardness. One of the feasible methods of surface hardening is electron beam hardening. In this work, 30 × 20 × 150 mm blocks made of nanobainitic steel were hardened using a defocused oscillating electron beam. Two methods of surface hardening were used – with movement of the sample relative to the heat source and hardening using only beam oscillation. The obtained samples were then subjected to light microscopic and scanning electron microscopic microstructure analysis as well as Vickers hardness testing. The average hardnesses of all hardened samples were in the range of 641–681 HV0.1 which means the surface hardening resulted in a hardness increase in the range of 239–279 HV0.1. The occurrence of similar hardening depths and hardness values in specimens hardened by both methods was an interesting phenomenon that was observed. The amount of energy input needed to achieve similar results was up to 35% less for the method without specimen movement.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electron beam hardening of nanobainitic steel

Śliwiński,

Węglowski,

Wieczorek

et al. 2024

Surface Engineering

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“…Thus, the influence of welding parameters and cooling time also has a crucial role in the final evaluation of welded joints. [ 21 ] The required level of mechanical properties of welded joints of high‐strength steels can be ensured by postwelding heat treatment (PWHT), the aim of which is to optimize the microstructure of welded joints [ 25–27 ] and reduce the residual stress. [ 28,29 ] Another method of enhancing the microstructure morphology of welded joints in the case of nanobainitic steels is heat treatment during the welding process, regeneration technique.…”

Section: Introductionmentioning

confidence: 99%

The Microstructure Prediction during the Welding Process of Fe–C–Si Steel Using Physical and Numerical Simulation: A Comparative Study

Królicka

Zalecki

Kuziak

et al. 2022

steel research int.

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Overall, medium‐carbon, multiphase steels subjected to welding processes can be described as difficult and require dedicated process conditions. In these investigations, an attempt is made to characterize the welding process of commercial 55Si7 steel with a high carbon equivalent (CE = 0.73). An experimental tungsten inert gas (TIG) welding process is performed by the use of preheating. Then, to understand and explain the processes during welding, a numerical (finite element method [FEM]) and physical (dilatometry) simulation is carried out. Measurement points located in the heat‐affected zone (HAZ) are selected based on the obtained data of thermal cycles. Significant differences in the results obtained with the three approaches are assessed and indicated. The cause of the discrepancies in the test results is also identified. The essence of the implementation of material data, which precisely defines the kinetics of phase transformation, is confirmed. A detailed analysis of the contribution of the phases is performed, together with their morphological assessment, as well as the hardness distributions are conscientiously compared. Moreover, it seems that the segregation of the chemical composition of austenite and the initial microstructure plays a crucial role in terms of the quality of the prediction.

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“…nanobainitic steels. Publication [5] presents the characteristics concerning the making of nanobainitic steels, their properties and possible areas of application. The extension of possible applicability of nanobainitic steels requires the development of technologies enabling the joining of such steels without compromising their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Fusion Welded and Friction Welded Joints Made in High-Carbon Nanobainitic Steels

Węglowski

Grobosz

Marcisz

et al. 2018

eBIS

Self Cite

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Intense research on the metallurgy of iron alloys have recently resulted in the development of technologies enabling the making of high-carbon nanobainitic steels. Because of their chemical composition, the above-named steels belong to hard-to-weld materials. To identify the possibility of welding such steels using arc-based methods and welding in the solid state it was necessary to make test joints and perform related metallographic tests. The test results revealed that it is possible to obtain both fusion and pressure welded joints if the process was performed in the softened state, i.e. before the final heat treatment. Afterwards, joints should be subjected to a heat treatment ensuring the obtainment of a previously assumed microstructure and required hardness distribution in the weld and HAZ.

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Technological Properties and Applications of High-Carbon Nanobainitic Steels

Cited by 5 publications

References 26 publications

Electron beam hardening of nanobainitic steel

Electron beam hardening of nanobainitic steel

The Microstructure Prediction during the Welding Process of Fe–C–Si Steel Using Physical and Numerical Simulation: A Comparative Study

Characteristics of Fusion Welded and Friction Welded Joints Made in High-Carbon Nanobainitic Steels

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