Carbide Precipitation in Ferrite in Nb–V-Bearing Low-Carbon Steel During Isothermal Quenching Process

Li, Xin; Lei, Chengshuai; Deng, Xiaomin; Li, Yanmei; Tian, Yong; Wang, Zhaodong; Wang, Guodong

doi:10.1007/s40195-017-0632-1

Cited by 21 publications

(8 citation statements)

References 31 publications

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“…In order to calculate the strength contribution of precipitates, volume fraction and average diameter need to be determined. The volume fraction

of precipitates was estimated from the following Equation (1) [ 32 ]. The average diameter d of precipitates was measured by Image-Pro Plus software with TEM micrographs.…”

Section: Discussionmentioning

confidence: 99%

The Impact of Interphase Precipitation on the Mechanical Behavior of Fire-Resistant Steels at an Elevated Temperature

Cong

Fan

et al. 2020

Materials

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In this study, we address the challenge of obtaining high strength at ambient and elevated temperatures in fire-resistant Ti–Mo–V steel with ferrite microstructures through thermo-mechanical controlled processing (TMCP). Thermally stable interphase precipitation of (Ti, Mo, V)C was an important criterion for retaining strength at elevated temperatures. Electron microscopy indicated that interphase precipitation occurred during continuous cooling after controlled rolling, where the volume fraction of interphase precipitation was controlled by the laminar cooling temperature. The interphase precipitation of MC carbides with an NaCl-type crystal structure indicated a Baker–Nutting (B–N) orientation relationship with ferrite. When the steel was isothermally held at 600 °C for up to 3 h, interphase precipitation occurred during TMCP with high thermal stability. At the same time, some random precipitation took place during isothermal holding. The interphase precipitation increased the elastic modulus of the experimental steels at an elevated temperature. It is proposed that fire-resistant steel with thermally stable interphase precipitation is preferred, which enhances precipitation strengthening and dislocation strengthening at elevated temperatures.

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“…In order to calculate the strength contribution of precipitates, volume fraction and average diameter need to be determined. The volume fraction

of precipitates was estimated from the following Equation (1) [ 32 ]. The average diameter d of precipitates was measured by Image-Pro Plus software with TEM micrographs.…”

Section: Discussionmentioning

confidence: 99%

The Impact of Interphase Precipitation on the Mechanical Behavior of Fire-Resistant Steels at an Elevated Temperature

Cong

Fan

et al. 2020

Materials

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“…GCr15SiMn is a new type of bearing steel material. Due to the addition of silicon and manganese elements, the hardenability, wear resistance, and elastic limit of GCr15 steel have been improved, [1][2][3][4] and the comprehensive mechanical properties have been greatly improved. Therefore, it is widely used in the manufacture of rolling bearings.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on ultrasonic vibration assisted grinding of GCr15SiMn bearing steel

Ma,

Xiang,

Lei

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Many problems of GCr15SiMn high-carbon chromium bearing steel have been found in the ordinary grinding (OG) process. Aiming at the problems of high grinding force, low residual compressive stress and low surface quality, ultrasonic machining technology is combined with OG. The test of ultrasonic vibration assisted grinding (UVAG) GCr15SiMn high carbon chromium bearing steel is carried out. The residual stress, surface roughness, grinding force, and surface morphology are analyzed by changing machining parameters. The research showed that as the grinding depth and feed speed become larger, the grinding force increased, when the spindle speed rises, the grinding force becomes smaller. In the test range, with the ultrasonic amplitude from small to large, the grinding force from large to small. The ultrasonic grinding force is 27.8% lower than that of OG. The surface roughness increases with increasing grinding depth and feed speed and decreases with increasing spindle speed and ultrasonic amplitude, and at an amplitude of 6 μm, the surface roughness is reduced by 27% compared to OG. When the feed speed and grinding depth are lowered or the ultrasonic amplitude is increased, the surface residual compressive stress is increased. Compared to OG, it is increased by more than 13.5% under the same parameters. At the same time, the phenomenon of burrs and surface tears can be reduced, and the surface quality of the workpiece becomes better.

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“…Since the transformation-induced plasticity (TRIP) steel has the excellent combination of high specific strength and ductility, it has been regarded as a potential candidate for automotive applications [2,3]. In order to improve the mechanical properties, some previous works investigated the influence of alloying precipitation on microstructures and mechanical properties, especially in Ti/Nb-bearing steels [4][5][6], Ti/Mo-bearing steel [7] and V/Nb-bearing steels [8,9]. It was proposed that TiN particles pin at the austenite grain boundary so the grain was refined [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of V–Ti Addition on Microstructure Evolution and Mechanical Properties of Hot-Rolled Transformation-Induced Plasticity Steel

Cai

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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In order to reveal the effect of V-Ti addition on the microstructure evolution and the mechanical properties of hot-rolled transformation-induced plasticity (TRIP) steel, two steels with 0.072V-0.051Ti steel (Bear-V-Ti steel) and 0.001V-0.001Ti steel (Free-V-Ti steel) were designed, respectively, and the comparison analyses were carried out by performing thermodynamic calculation and an experiment. With the thermodynamic calculation, the critical annealing temperature of a large fraction of retained austenite (* 51%) obtained via solute enrichment was determined, and an optimized quenching at 650°C and tempering at 200°C adopted on the as-hot-rolled steel. The results show that the V-Ti TRIP steel displays more optimum mechanical stability during the tensile deformation, since the fraction and the mechanical stability of retained austenite are improved and the microstructure is also ultrarefined by V-Ti alloy precipitation. The yield strength of Bear-V-Ti steel increases from 650 to 800 MPa, and the ductility reaches 37%, showing that the comprehensive mechanical properties are greatly improved.

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Carbide Precipitation in Ferrite in Nb–V-Bearing Low-Carbon Steel During Isothermal Quenching Process

Cited by 21 publications

References 31 publications

The Impact of Interphase Precipitation on the Mechanical Behavior of Fire-Resistant Steels at an Elevated Temperature

The Impact of Interphase Precipitation on the Mechanical Behavior of Fire-Resistant Steels at an Elevated Temperature

Experimental study on ultrasonic vibration assisted grinding of GCr15SiMn bearing steel

Effect of V–Ti Addition on Microstructure Evolution and Mechanical Properties of Hot-Rolled Transformation-Induced Plasticity Steel

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