Influence of cooling rate on the precipitation behavior in Ti–Nb–Mo microalloyed steels during continuous cooling and relationship to strength

Bu, Fan; Wang, X.M.; Chen, L.; Yang, Shengbo; Chen, Shang; Misra, R.D.K.

doi:10.1016/j.matchar.2015.03.005

Cited by 61 publications

(14 citation statements)

References 26 publications

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“…According to the previous studies, the interphase precipitation occurs at relatively higher temperatures, and it was also observed that interphase precipitation can only occur in some ferrite grains, not in all [20][21][22]. In our study, interphase precipitation was observed only in some ferrite grains when the specimen was isothermally holding at the temperature of 700°C for 60 min.…”

Section: Precipitation Behaviorsupporting

confidence: 77%

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

Lei

Deng

et al. 2017

Acta Metall. Sin. (Engl. Lett.)

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The precipitation behavior of nanometer-sized carbides in ferrite in Nb-V-bearing low-carbon steel was studied by electron microscopy and nanoindentation hardness measurements. The results indicated that interphase precipitation and random precipitation could occur simultaneously for the specimen isothermally treated at 700°C for 60 min, while in other specimens, only random precipitation was observed. This phenomenon might be explained by mass balance criterion during the diffusional phase transformation. Nanohardness result indicated that the average hardness of the specimens isothermally held at 600°C for 20 min was 3.87 GPa. For the specimen isothermally holding at 650°C for 20 min, the average hardness was 4.10 GPa and the distribution of the nanohardness was in a narrower range compared with that of the specimen isothermal holding at 600°C for 20 min. These implied that the carbides in the specimens isothermal treated at 650°C were more uniformly dispersed, and the number density of the carbides was greater than that treated at 600°C. Using Ashby-Orowan model, the contribution of precipitation strengthening to yield strength was estimated to be *110 MPa for the specimen isothermally treated at the temperature of 650°C for 20 min.

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Section: Precipitation Behaviorsupporting

confidence: 77%

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

Lei

Deng

et al. 2017

Acta Metall. Sin. (Engl. Lett.)

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“…[14][15][16][17][18] In the literature review, microstructure and mechanical properties were investigated as a result of different thermomechanical processes after heat treatment and forging applied to microalloyed steels. [19][20][21][22][23] Moreover, as-received states of microalloyed steels were subjected to machinability tests without being exposed to any process. [24][25][26] However, the changes in microstructure and hardness of microalloyed steels cooled in dissimilar environments following the hot forging were examined and in the light of these results, Fc, Ra and cutting tool wears of the machined materials were determined.…”

Section: Introductionmentioning

confidence: 99%

Examining the machinability of 38MnVS6 microalloyed steel, cooled in different mediums after hot forging with the coated carbide and ceramic tool

Özlü

Demir

Türkmen

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this study, the effect of the microstructure, hardness, and cutting speed on main cutting force and surface roughness in medium carbon microalloyed steel cooled in different mediums after hot forging, was investigated. As-received sample, which was not hot forged, and the samples cooled in the sand, air, oil, and polymerized water after hot forging were used for the experimental studies. The machinability tests were performed via turning method by using coated carbide and coated ceramic cutting tools with five cutting speed (120, 150, 180, 210, and 240 m/min), constant feed rate (0.04 mm/rev), and constant depth of cut (0.6 mm). The microstructure examinations of the samples were carried out and their hardness values were determined. Also, the wear of cutting tools were examined with scanning electron microscope. In the experimental study, it was revealed that the microstructure, hardness and cutting speed had a significant effect on the surface roughness values of the samples cooled in dissimilar environments following forging. Moreover, the samples cooled in air and polymerized water, whose hardness increased depending on the increase in the cooling rate, had the highest cutting force after machining by using the coated carbide and ceramic tool.

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“…Previous studies of IPP have included topics such as the effect of transformation temperature [11,15,26], time [27], cooling rate [16,[28][29][30], orientation relationship [15,[31][32][33][34][35], hot deformation [17,36] as well as the addition of Mo [10,14,[21][22][23][24][25] on precipitate composition, size, morphology and number density. The majority of these prior studies have used transmission electron microscopy (TEM) to characterise the precipitates [14,18,19,22,37,38].…”

Section: Introductionmentioning

confidence: 99%

Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering

et al. 2018

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Influence of cooling rate on the precipitation behavior in Ti–Nb–Mo microalloyed steels during continuous cooling and relationship to strength

Cited by 61 publications

References 26 publications

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

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

Examining the machinability of 38MnVS6 microalloyed steel, cooled in different mediums after hot forging with the coated carbide and ceramic tool

Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering

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