Investigation on the behaviour of medium carbon and vanadium microalloyed steels by hot forging test

Kaynar, Ahmet; Gündüz, Süleyman; Türkmen, Mustafa

doi:10.1016/j.matdes.2013.04.102

Cited by 44 publications

(30 citation statements)

References 24 publications

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“…The precipitation of NbC(N) and AlN particles during sintering or cooling after sintering increases the hardness of microalloyed PM steels. These results are consistent with the results obtained from earlier studies [27,28]. 3.2.…”

Section: Resultssupporting

confidence: 93%

Wear behaviour of sintered steels obtained using powder metallurgy method

Erden¹,

Gündüz²,

Karabulut³

et al. 2017

mech

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Section: Resultssupporting

confidence: 93%

Wear behaviour of sintered steels obtained using powder metallurgy method

Erden¹,

Gündüz²,

Karabulut³

et al. 2017

mech

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“…Microalloyed or High Strength Low Alloy (HSLA) steels constitute an important category of steels estimated to be around 12% of total world steel production, which have been increasingly used in a variety of automotive components such as connecting rods, wheel hubs, suspension systems, crankshafts and driveline components [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

A simple constitutive model for predicting flow stress of medium carbon microalloyed steel during hot deformation

2015

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. 1 A Simple Constitutive Model for Predicting Flow Stress of Medium Carbon Microalloyed Steel during Hot Deformation AbstractThe constitutive behavior of a medium carbon microalloyed steel during hot working over a wide range of temperatures and strain rates was studied using the Johnson-Cook (JC) model, the Hollomon equation, and their modifications. The original JC model was not able to predict the softening part of the flow curves and the subsequent modifications of the JC model to account for the softening stage and the strain dependency of constants were not satisfactory owing to the uncoupled nature of the JC approach regarding strain rate and temperature. The coupled effect of these variables was considered in the form of Zener-Hollomon parameter (Z) and the constants of the Hollomon equation were related to Z. This modification was found to be useful for the hardening stage but the overall consistency between the experimental flow curves and the calculated ones was not good. Therefore, a simple constitutive model was proposed in the current work, in which by utilization of the peak stress and strain into the Hollomon equation, good prediction abilities were attained. Conclusively, the proposed model can be considered as an efficient one for modeling and prediction of hot deformation flow curves.

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“…MA forging steels are usually characterized by a small addition of microalloying elements to a basic C-Mn composition, and then the desired strength levels and other properties of hot-forged components could be obtained by controlled cooling after thermomechanical forging. The forging parameters, post-forging cooling strategies as well as compositions of MA steels have a significant effect on the microstructural characteristics, and thus the final mechanical properties of forged components, and therefore, many researches have been conducted [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Of the three aforementioned factors, the variation of post-forging cooling conditions could obtain different microstructural characteristics and thus has an extraordinary influence on the final mechanical properties of MA steels [2][3][4][5][8][9][10]. Increasing cooling rate enhances grain refinement and increases the proportion of hard phase of pearlite or the formation of high hardness phases such as bainite and martensite.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, microalloying with V is widely used in medium-carbon forging steels mainly for the purpose of precipitation hardening of fine V(C,N) precipitates in both proeutectoid ferrite and pearlitic ferrite [14]. The normal addition of V is generally less than 0.15% in conventional medium-carbon MA forging steels [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. In recent years, there is a tendency to further increase V content up to about 0.30% or even 0.50%, for the development of even higher strength level MA forging steels especially crackable mediumcarbon MA steels for fabricating high-performance fracture splitting connecting rod [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing the Mechanical Properties of Vanadium-Microalloyed Medium-Carbon Steel by Optimizing Post-Forging Cooling Conditions

Wang¹,

Zhang²,

Shao³

et al. 2015

Materials and Manufacturing Processes

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The effects of different cooling conditions after forging on the microstructural characteristics and mechanical properties of a kind of high-content V-microalloyed medium-carbon steel 37MnSiVS were investigated. The effects were studied by using optical microscopy, transmission electron microscopy and tensile tests. Increasing direct cooling rate after forging is found to increase strength while slightly decrease ductility. A significant increase of strength could be obtained after forced air cooling and then short time isothermal holding at 873 K, while strength decreases gradually with further increasing holding time. The variations of microstructural characteristics especially V(C,N) precipitation strengthening effects with cooling conditions are mainly responsible for these variations of tensile properties. For the investigated high V-containing MA steel, a direct cooling strategy after finish forging is proposed, which includes accelerated cooling with forced air in ferrite range, following by short time isothermal holding or very slow cooling at around 873 K and then air cooling.

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Investigation on the behaviour of medium carbon and vanadium microalloyed steels by hot forging test

Cited by 44 publications

References 24 publications

Wear behaviour of sintered steels obtained using powder metallurgy method

Wear behaviour of sintered steels obtained using powder metallurgy method

A simple constitutive model for predicting flow stress of medium carbon microalloyed steel during hot deformation

Enhancing the Mechanical Properties of Vanadium-Microalloyed Medium-Carbon Steel by Optimizing Post-Forging Cooling Conditions

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