Effect of Short-Time Carburizing Treatment on Microstructure and Mechanical Properties of M50 Steel

By using scanning electron microscope (SEM), transmission electron microscope (TEM), X-Ray diffraction (XRD), and hardness and rotational bending fatigue tests, the effect of short-time carburizing treatment on the microstructure and mechanical properties of bearing steel was studied. The results sh...

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Published inMetals and materials international Vol. 29; no. 6; pp. 1586 - 1595
Main Authors Wei, Yinghua, Yu, Xingfu, Wang, Shuai, Shen, Xiangyang, Zhao, Wenzeng, Su, Yong, Yang, Yu, Feng, Xiaochuan
Format Journal Article
LanguageEnglish
Published Seoul The Korean Institute of Metals and Materials 01.06.2023
Springer Nature B.V
Subjects
Absorption
Bearing steels
Bend strength
Bending fatigue
Carbides
Carbon
Carburization (corrosion)
Carburizing
Characterization and Evaluation of Materials
Chemistry and Materials Science
Electron microscopes
Engineering Thermodynamics
Fatigue limit
Fatigue strength
Fatigue tests
Hardness
Heat and Mass Transfer
High speed tool steels
Machines
Magnetic Materials
Magnetism
Manufacturing
Materials Science
Mechanical properties
Metal fatigue
Metallic Materials
Microstructure
Processes
Solid Mechanics
Carburizing
Microstructure
Mechanical property
Carbides
M50 steel
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Summary:By using scanning electron microscope (SEM), transmission electron microscope (TEM), X-Ray diffraction (XRD), and hardness and rotational bending fatigue tests, the effect of short-time carburizing treatment on the microstructure and mechanical properties of bearing steel was studied. The results show that when the M50 steel is not carburized, the hardness is 750 HV, the rotational bending fatigue limit is 1100 MPa, and the impact absorption energy is 15.46 J. After short-time carburization with the carbon potential of 0.6%, the maximum hardness in the carburized area, the rotational bending fatigue limit and the impact absorption energy are all increased to be 807.7 HV, 1210 MPa and 16.72 J respectively. When the carbon potential is further enhanced to be 0.8%, the maximum hardness of the carburized area of the steel is further enhanced to be 813.4 HV, but the rotational bending fatigue strength and the impact absorption energy are both decreased to be 1125 MPa and 13.65 J respectively, which has close relations with the increasement of undissolved carbides and the precipitation of acicular carbides. Graphical Abstract
ISSN:1598-9623
2005-4149
DOI:10.1007/s12540-022-01326-1