Effect of Cooling Rates on the Second‐Phase Precipitation and Proeutectoid Phase Transformation of a Nb–Ti Microalloyed Steel Slab

Ma, Fanjun; Wen, Guangrui; Wang, Wanlin

doi:10.1002/srin.201200161

Cited by 33 publications

(23 citation statements)

References 10 publications

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“…It can also be inferred that when the temperature is below A 3 , prenucleated carbonitride along the boundaries contributes to the nucleation [8], refinement and reinforcement of ferrite structure so that the fluctuation of tensile strength is disappeared.…”

Section: Hot Strength Curves and Hot Ductility Curvesmentioning

confidence: 97%

Influence of V–N Microalloying on the High-Temperature Mechanical Behavior and Net Crack Defect of High Strength Weathering Steel

Qing

Wang

Dou

et al. 2015

High Temperature Materials and Processes

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The influence of V-N microalloying on the high-temperature mechanical behavior of high strength weathering steel is discussed through thermomechanical simulation experiment. The difference of tensile strength caused by variation of [%V][%N] appears after proeutectoid phase change, and the higher level of [%V] [%N] is, the stronger the tensile strength tends to be. The ductility trough apparently becomes deeper and wider with the increase of [%V] [%N]. When the level of [%V][%N] reaches to 1.7 Â 10 −3 , high strength weathering steel shows almost similar reduction of area to 0.03% Nb-containing steel in the temperature range of 800-900℃, however, the ductility trough at the lowtemperature stage is wider than that of Nb-containing steel. Moreover, the net crack defect of bloom is optimized through the stable control of N content in low range under the precondition of high strength weathering steel with sufficient strength.

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Section: Hot Strength Curves and Hot Ductility Curvesmentioning

confidence: 97%

Influence of V–N Microalloying on the High-Temperature Mechanical Behavior and Net Crack Defect of High Strength Weathering Steel

Qing

Wang

Dou

et al. 2015

High Temperature Materials and Processes

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“…Micro alloying element such as Nb and Ti contributes to the strength by precipitation hardening and grain refinement . During the reheating process, most of the insoluble TiN and Nb(C, N) concentrate in the austenite grain boundary . The particles prevent the grain boundary movement of the austenite by pinning the grain boundary, which hinders the grain growth of high temperature austenite.…”

Section: Mechanical Property Prediction Modelingmentioning

confidence: 99%

High‐Dimensional Data‐Driven Optimal Design for Hot Strip Rolling of Microalloyed Steel

Zhou

Cao

et al. 2018

steel research int.

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To solve the contradiction between consumer's personal demand and mass production of steel enterprise, the optimal design for hot strip rolling of steel attracts researcher's attention. The core of the ensemble system is the artificial neural network (ANN) model, which is based on the industrial data. However, industrial data are difficult to be used for modeling because of their high dimension, low quality, and unbalanced. In current work, the method for industrial data processing is proposed for microalloyed steel. Based on the treated data, the mechanical property prediction models are established with the relative error of ±8% for yield strength (YS), ±6% for tensile strength (TS), and the absolute error of ±4% for elongation (EL), respectively. Combined with the multi‐objective optimization algorithm, the ANN models are implemented for designing the hot rolling process for S360 grade steel to control the stability of product quality.

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“…2) When the precipitations shows a chain-like distribution in the matrix, the volume fraction of the prior austenite grain boundaries precipitations was equal to the theoretical amount of complete precipitation. 23) Therefore, the V ppt was calculated approximately by the theoretical volume fraction of the precipitation.…”

Section: Determination Of the V Pptmentioning

confidence: 99%

“…The detailed algorithm can be found in the Ref. 23). The volume fraction of the theoretical amount of the second-phase precipitations occupying the force unit is given in Table 4.…”

Section: Determination Of the V Pptmentioning

confidence: 99%

A Model Estimating the Slab Corner Transverse Cracking Susceptibility of Microalloyed Steel Based on Microstructure

Liu

Wen

et al. 2016

Mater. Trans.

Self Cite

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During the bending and straightening process of low carbon microalloyed steel, high-temperature microstructure (HTM) governs the slab corner transverse cracking susceptibility. In this paper, the stiffness was used to characterize the resistance ability of HTM to elastic deflection, and a model describing the relationship between the stiffness and characteristics of HTM was established. The criterion was created based on the HTM features for the slab corner transverse cracking susceptibility. The results are mainly manifested in two aspects: 1) the stiffness was used to characterize the resistance of HTM against the elastic deformation, and it can also indirectly reflect the relationship between prior austenite grain and film-like ferrite, second-phase precipitate.2) The critical equivalent diameter of the prior austenite generating the slab surface transverse cracks was found to be 0.68 mm. If the equivalent diameter of the prior austenite (D £ P ) became >0.85 mm, the index of the traverse crack on the surface of slab increased sharply, indicating strong susceptibility of transverse corner cracks.

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Effect of Cooling Rates on the Second‐Phase Precipitation and Proeutectoid Phase Transformation of a Nb–Ti Microalloyed Steel Slab

Cited by 33 publications

References 10 publications

Influence of V–N Microalloying on the High-Temperature Mechanical Behavior and Net Crack Defect of High Strength Weathering Steel

Influence of V–N Microalloying on the High-Temperature Mechanical Behavior and Net Crack Defect of High Strength Weathering Steel

High‐Dimensional Data‐Driven Optimal Design for Hot Strip Rolling of Microalloyed Steel

A Model Estimating the Slab Corner Transverse Cracking Susceptibility of Microalloyed Steel Based on Microstructure

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