Impact of Si on Microstructure and Mechanical Properties of 22MnB5 Hot Stamping Steel Treated by Quenching &amp; Partitioning (Q&amp;P)

Linke, Bernd M.; Gerber, T.L.; Hatscher, Ansgar; Salvatori, I.; Aranguren, Iñigo; Arribas, Maribel

doi:10.1007/s11661-017-4400-7

Cited by 26 publications

(10 citation statements)

References 25 publications

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“…[ 13 ] It was lower in the high‐C steel, although still a certain effect could be expected. [ 22 ] Additionally, the high‐C steel contained a significant content of carbides forming elements Cr, Mo, and V, which confer the high hardness and wear resistance properties, and the medium‐C steel presented a medium content of Ni, which was expected to contribute to austenite stabilization in the Q&P type thermal treatment.…”

Section: Methodsmentioning

confidence: 99%

Microstructure and Wear Resistance in Medium and High C Steels Treated by Quenching and Partitioning

Molino

Arribas

Pérez

et al. 2023

steel research int.

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The quenching and partitioning (Q&P) steels have shown to be promising candidates to be applied in fields where wear resistance is required. In this study, a medium and a high C steel are heat treated by Q&P and the resulting microstructure, hardness, and wear resistance are characterized. The mechanical stability of the austenite phase under wear test conditions is investigated. It is found that the stability of austenite is very high in the high C steel and decreases in the medium C steel. Additionally, the hardness and wear behavior of the Q&P‐treated steels are compared with the results obtained for quenching and tempering (Q&T) treated samples, showing that, although the hardness of Q&P steels is quite lower, the obtained wear rates are similar. It means that in the studied Q&P steels, although the austenite transformation into martensite does not occur considerably, the presence of austenite might play a key role in the wear resistance.

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Section: Methodsmentioning

confidence: 99%

Microstructure and Wear Resistance in Medium and High C Steels Treated by Quenching and Partitioning

Molino

Arribas

Pérez

et al. 2023

steel research int.

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“…It has been observed by them that the martensite rejects its carbon in less than 0.1 s while it takes ∼ 10 s to homogenise inside untransformed austenite at 400°C. The DICTRA software has also been employed to simulate the kinetics of carbon partitioning in some other studies [51,52]. However, the carbon content of decarburised martensite in a Fe-0.19C-1.59Mn-1.63Si-0.04Al (wt-%) steel sample quenched to the QT of 220°C and partitioned at 400°C for 10 s is measured to be around 0.04 and 0.10 wt-% using 3D APT analysis [34].…”

Section: Kinetics Of the Carbon Partitioningmentioning

confidence: 99%

Quenching and partitioning (Q&P) process: A critical review of the competing reactions

Kumar

2022

Materials Science and Technology

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The quenching and partitioning (Q&P) process has been proposed recently as an alternative route to obtain a unique microstructure consisting of decarburised martensite and retained austenite that results in a superior balance between strength and ductility. The stabilisation of austenite after the Q&P processing is mainly achieved through its carbon enrichment as a result of carbon partitioning from primary martensite formed during initial quenching. However, carbon partitioning is usually accompanied by complex competing reactions which are known to affect the austenite retention at room temperature. This review is a critical assessment of these competing reactions during the Q&P process and their implication on the evolution of microstructure.

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“…In M-MnNi steel, low-stability RA likely transformed quite early to martensite, introducing a hard and brittle phase into the area of highest strain. A significant hardness difference between microstructural constituents has been found detrimental for hole expansion [64,67]. Additionally, given the low expected mechanical stability of austenite, likely a fraction of martensite was available after punching the hole due to the massive TRIP effect during the punching operation, which further contributes to the hardness gradients, resulting in very poor hole expansion.…”

Section: Relationship Between Mechanical Properties and Microstructurementioning

confidence: 99%

Characterization of a Medium Mn-Ni Steel Q&P Treated by a High Partitioning Temperature Cycle

Arribas

Molino

Gutiérrez

et al. 2022

Metals

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In this work, a medium Mn-Ni steel was treated through Quenching and Partitioning (Q&P) with a partitioning temperature (PT) of 650 °C, which corresponded to the start of the austenite reverse transformation (ART) phenomenon. The influence of the quenching temperature (QT) and partitioning time (Pt) on austenite stabilization and mechanical properties was investigated. A strong influence of the quenching temperature was observed. Results were compared with those obtained after a Q&P treatment with 400 °C partitioning temperature. The Q&P cycle with quenching to room temperature and a high partitioning temperature produced a steel with a high retained austenite (RA) volume fraction and exceptional strength–ductility balance. The analysis of the mechanical stability of the retained austenite revealed a significant stress-induced transformation. Nevertheless, the austenite, which was stable at stresses above the yield stress, provided significant TRIP-assisted ductility. Bending, hole expansion and post-stamping properties were also evaluated for the most promising conditions.

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Impact of Si on Microstructure and Mechanical Properties of 22MnB5 Hot Stamping Steel Treated by Quenching & Partitioning (Q&P)

Cited by 26 publications

References 25 publications

Microstructure and Wear Resistance in Medium and High C Steels Treated by Quenching and Partitioning

Microstructure and Wear Resistance in Medium and High C Steels Treated by Quenching and Partitioning

Quenching and partitioning (Q&P) process: A critical review of the competing reactions

Characterization of a Medium Mn-Ni Steel Q&P Treated by a High Partitioning Temperature Cycle

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