Characterization of microstructure obtained by quenching and partitioning process in low alloy martensitic steel

Wang, C.Y.; Shi, Jie; Cao, Wenquan; Han, Dong

doi:10.1016/j.msea.2010.02.020

Cited by 218 publications

(84 citation statements)

References 13 publications

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“…The volume fractions of RA (V RA ) and the carbon contents in RA (C RA ) were calculated based on the integrated intensities of (200) α, (211) α, (200) γ, and (220) γ diffraction peaks, and the angles of (200) and (220) austenite peaks, respectively, according to the method proposed in Refs. [11,22]. The results are shown in Figure 8a.…”

Section: Retained Austenitementioning

confidence: 96%

Effects of Tempering on the Microstructure and Properties of a High-Strength Bainite Rail Steel with Good Toughness

Zhu

Zhou

et al. 2018

Metals

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An advanced bainite rail with high strength-toughness combination was produced in a steel mill and the effects of tempering on the microstructure and properties of the bainite rail steel were investigated by optical microscopy, transmission electron microscopy, electron back-scattering diffraction and X-ray diffraction. Results indicate that the tensile strength, elongation and impact toughness were about 1470 MPa, 14.5% and 83 J/cm 2 , respectively, after tempering at 400 • C for 200 min. Therefore, a high-strength bainite rail steel with good toughness was developed. In addition, the amount of retained austenite (RA) decreased due to bainite transformation after low-temperature tempering (300 • C) and RA almost disappeared after high-temperature tempering (500 • C). Moreover, as the tempering temperature increased, the tensile strength of the rail head first decreased due to the decreased dislocation density and carbon content in bainite ferrite and the coarseness of bainite ferrite, and then increased because of carbide precipitation at high-temperature tempering. Furthermore, RA played a significant role in the toughness of bainite rail. The elongation and toughness of the rail obviously decreased after tempering at 500 • C for 200 min because of the disappearance of RA and appearance of carbides.

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Section: Retained Austenitementioning

confidence: 96%

Effects of Tempering on the Microstructure and Properties of a High-Strength Bainite Rail Steel with Good Toughness

Zhu

Zhou

et al. 2018

Metals

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“…This is consistent with the dilatation results ( Figure 3). In addition, the volume fractions of RA (Vγ) in two the steels are calculated according to the integrated intensities of (200)α, (211)α, (200)γ, and (220)γ diffraction peaks based on the following equation [23,24].…”

Section: Microstructuresmentioning

confidence: 99%

Bainitic Transformation and Properties of Low Carbon Carbide-Free Bainitic Steels with Cr Addition

Zhou

Tian

et al. 2017

Metals

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Two low carbon carbide-free bainitic steels (with and without Cr addition) were designed, and each steel was treated by two kinds of heat treatment procedure (austempering and continuous cooling). The effects of Cr addition on bainitic transformation, microstructure, and properties of low carbon bainitic steels were investigated by dilatometry, metallography, X-ray diffraction, and a tensile test. The results show that Cr addition hinders the isothermal bainitic transformation, and this effect is more significant at higher transformation temperatures. In addition, Cr addition increases the tensile strength and elongation simultaneously for austempering treatment at a lower temperature. However, when the austempering temperature is higher, the strength increases and the elongation obviously decreases by Cr addition, resulting in the decrease in the product of tensile strength and elongation. Meanwhile, the austempering temperature should be lower in Cr-added steel than that in Cr-free steel in order to obtain better comprehensive properties. Moreover, for the continuous cooling treatment in the present study, the product of tensile strength and elongation significantly decreases with Cr addition due to more amounts of martensite.

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“…[13][14][15][16][17] It is well known that retained austenite fraction and stability are beneficial to excellent mechanical properties of medium manganese steels, moreover chemical composition and heat treatment have significant effects on the retained austenite. Thus it is necessary to investigate the effect of alloying element on microstructure characteristic and mechanical properties under appropriate heat treatment condition.…”

Section: Effects Of Aluminium On the Microstructure And Mechanical Prmentioning

confidence: 99%

Effects of Aluminium on the Microstructure and Mechanical Properties in 0.2C–5Mn Steels under Different Heat Treatment Conditions

Cao

Han

et al. 2015

ISIJ Int.

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Characterization of microstructure obtained by quenching and partitioning process in low alloy martensitic steel

Cited by 218 publications

References 13 publications

Effects of Tempering on the Microstructure and Properties of a High-Strength Bainite Rail Steel with Good Toughness

Effects of Tempering on the Microstructure and Properties of a High-Strength Bainite Rail Steel with Good Toughness

Bainitic Transformation and Properties of Low Carbon Carbide-Free Bainitic Steels with Cr Addition

Effects of Aluminium on the Microstructure and Mechanical Properties in 0.2C–5Mn Steels under Different Heat Treatment Conditions

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