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Physics of Metals and Metallography

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01.06.2024 | STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION

Structure and Surface Properties of Stable Austenitic Steel Subjected to Liquid Carburizing at Lowered Temperature

verfasst von: R. A. Savrai, P. A. Skorynina, Yu. M. Kolobylin

Erschienen in: Physics of Metals and Metallography | Ausgabe 6/2024

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Abstract

The paper studies the structure, chemical and phase composition, microhardness, and surface roughness of heat-resistant chromium–nickel (in wt %: 24.27 Cr and 18.81 Ni) austenitic steel subjected to liquid carburizing at a temperature of 780°С. It is established that the microstructure of the carburized layer predominately consists of carbon-rich austenite (γ-phase), chromium carbide Cr₇C₃, and cementite Fe₃C. It is revealed that carbides precipitate both at boundaries and inside the austenite grains; as we move away from the steel surface, the amount and dispersity of intragranular carbides decreases. It is also established that liquid carburizing leads to an increase in the microhardness of steel surface from 200 to 590 HV0.0025. The total depth of hardening is approximately 200 μm, and the hardened layer is gradient-wise. The surface of the carburized steel is characterized by large surface roughness (Ra = 2.40 μm and Rz = 17.60 μm), compared to the electropolished surface of specimens before carburizing (Ra = 0.17 μm and Rz = 1.80 μm), which is caused by several factors, including, e.g., oxidation of the surface.

Vorheriger Artikel Structural–Phase Transformations and Crystallographic Texture in Commercial Ti–6Al–4V Alloy with Globular Morphology of α-Phase Grains: The Rolling Plane

Nächster Artikel Surface Modification of Zr–Nb Alloy by Nanosecond Pulse Laser Processing

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Titel: Structure and Surface Properties of Stable Austenitic Steel Subjected to Liquid Carburizing at Lowered Temperature
verfasst von: R. A. Savrai
P. A. Skorynina
Yu. M. Kolobylin
Publikationsdatum: 01.06.2024
Verlag: Pleiades Publishing
Erschienen in: Physics of Metals and Metallography / Ausgabe 6/2024
Print ISSN: 0031-918X
Elektronische ISSN: 1555-6190
DOI: https://doi.org/10.1134/S0031918X24600350

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Structural–Phase Transformations and Crystallographic Texture in Commercial Ti–6Al–4V Alloy with Globular Morphology of α-Phase Grains: The Rolling Plane

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Springer Professional

Abstract

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Sie haben noch keine Lizenz? Dann Informieren Sie sich jetzt über unsere Produkte:

Springer Professional "Wirtschaft+Technik"

Springer Professional "Wirtschaft"

Springer Professional "Technik"

Surface Modification of Zr–Nb Alloy by Nanosecond Pulse Laser Processing

On the Effect of Heating of Two-Phase Alloyed Brasses on Morphological Peculiarities of Intermetallic Inclusions

Structural–Phase Transformations and Crystallographic Texture in Commercial Ti–6Al–4V Alloy with Globular Morphology of α-Phase Grains: The Rolling Plane

Thermal Stability of Microstructure and Properties of Ingots and Fine Wires from Al–Zr Alloys

Influence of Magnetic Field on Phase Transitions in the Antiferromagnetic Potts Model

Electro-Optic Effect in Hexagonal Compounds RFeO3