Effect of Hot-rolling Parameters on the Microstructure and Property of Fe–Mn–Al–C Micro–laminated Dual Phase Steels

Zhang, Mingda; Xu, Haifeng; Cao, Wenquan; Han, Dong

doi:10.2355/isijinternational.isijint-2015-425

Cited by 7 publications

(3 citation statements)

References 27 publications

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“…Moreover, the lamellar structure of soft/hard phase was conducive to impact toughness. 35 When impacted at 25 °C, the fracture layer is thicker and the size of dimples on the fracture surface is larger and deeper (see Figure 7). However, after low-temperature treatment at −40 and −80 °C, the stability of austenite in layered structure is lower.…”

Section: Relations Of Retained Austenite With Mechanical Propertiesmentioning

confidence: 99%

Impact toughness and fracture behaviour of a lamellar structural Fe–Mn–Al–C cryogenic steel

Zhang,

Li,

et al. 2024

Materials Science and Technology

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In this work, a nickel-free Fe–Mn–Al–C lightweight structural steel for cryogenic application was developed. Based on the quenching-tempering (Q-T) process, the samples were heated to 650, 700, 750 and 800 °C and then quenched and tempered at 200 °C. The microstructure evolution and impact toughness of the tested steel were studied by X-ray diffraction, OM, SEM, TEM and EPMA. The microstructure is mainly composed of δ-ferrite, tempered martensite and retained austenite. The partition of carbon and manganese elements affected the stability of austenite in the steels, resulting in the reduction of the TRIP effect. The lamellar structure was beneficial to the strength and the cryogenic impact toughness of the steel and improved the plastic deformation ability during deformation.

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Section: Relations Of Retained Austenite With Mechanical Propertiesmentioning

confidence: 99%

Impact toughness and fracture behaviour of a lamellar structural Fe–Mn–Al–C cryogenic steel

Zhang,

Li,

et al. 2024

Materials Science and Technology

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“…it is frequently reported, that increasing the surface area of the ferrite-martensite interface improves the ductility of DP steels by enhancing the deformation strengthening mechanism [9][10][11][12]. Therefore, a microstructure consisting of many fine, elongated islands of martensite is considered the most favourable, as it results in an increased ferrite-martensite interface area.…”

Section: Shaping the Dual Phase Microstructurementioning

confidence: 99%

Characteristic of DP600 Steel Produced in Hot Rolling Process

Kaźmierski,

Krawczyk,

Frocisz

2023

Archives of Metallurgy and Materials

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CharaCteristiC of DP600 steel ProDuCeD in hot rolling ProCess DP600 steels are characterized by a dual phase ferritic-martensitic microstructure, to which they owe their exceptionally favourable combination of high strength and good ductility. one of the production methods for this grade of steel is the hot rolling process. Despite the fact that these steels have been produced on an industrial scale for almost 40 years, they are still being studied intensively, with new research on the formation of their microstructure and properties published every year. This article focuses on the characteristics of DP600 steel produced on a hot rolling mill for applications in automotive industry. The article presents the results of mechanical properties tests and microstructure analysis of DP600 steel obtained in an industrial hot rolling process. The general characteristic of DP600 steel presented in this article, is supplemented with statistical analysis of correlations between chemical composition, selected process parameters and mechanical properties of hot rolled DP600 steel.

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“…In the past, a number of studies on cold rolling and annealing of low-carbon low density steels have been reported. [12][13][14][15] As for example, Rana et al 9) studied the crystallographic texture in cold rolled and annealed (at 900°C for 1 minute) steels having Al contents between 6.8 to 9.7 mass%. However, cold rolling and warm rolling of low density steels has not been widely reported and discussed.…”

Section: Introductionmentioning

confidence: 99%

Effects of Temperatures of Rolling and Annealing on Microstructures and Tensile Properties of Low Carbon Ferritic Low Density Steels

Singh¹,

Rana

Singh³

et al. 2023

ISIJ Int.

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The microstructural modification and the effect of cold/warm rolling and annealing on tensile properties of ferritic low density steels containing different amounts of carbon (0.0035 mass%, Steel 1 and 0.04 mass%, Steel 2) and aluminium (6.8 mass%, Steel 1 and 9.7 mass%, Steel 2) were investigated with respect to amount of ferrite, grain size and formation of Fe 3 Al intermetallic. The Steel 1 was deformed by cold rolling at room temperature and Steel 2 was deformed through warm rolling at 250°C to avoid prior cracks formation. After rolling, samples of Steels 1 and 2 were annealed at 900°C for 5 minutes. The yield strength, ultimate tensile strength and ductility increase while yield ratio decreases with annealing. This is due to formation of Fe 3 Al intermetallic and reduction of ferrite grain size. Due to high interstitial Carbon in Steel 2, yield point phenomenon was observed which may reduce the formability of the steel. The cracks started during tensile test at the ferrite grains and ferrite grain boundaries and the fracture took place in the quasi cleavage mode in Steels 1 and 2. The grain refinement and the microstructural features due to rolling and annealing are accountable for the good combination of strength and ductility of the both steels. KEY WORDS: low density steel; rolling and annealing; tensile properties; quasi cleavage fracture.

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Effect of Hot-rolling Parameters on the Microstructure and Property of Fe–Mn–Al–C Micro–laminated Dual Phase Steels

Cited by 7 publications

References 27 publications

Impact toughness and fracture behaviour of a lamellar structural Fe–Mn–Al–C cryogenic steel

Impact toughness and fracture behaviour of a lamellar structural Fe–Mn–Al–C cryogenic steel

Characteristic of DP600 Steel Produced in Hot Rolling Process

Effects of Temperatures of Rolling and Annealing on Microstructures and Tensile Properties of Low Carbon Ferritic Low Density Steels

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