Research on Q&amp;P hot stamping process integrated with fractional cooling strategy

Han, Xianhong; Li, Yuanyuan; Chen, Sisi; Tan, Shulin; Ding, Yanan; Chen, Jun

doi:10.1016/j.proeng.2017.10.1045

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…In order to further improve the properties of medium manganese steel and improve the plastic formability of medium manganese steel, Xu [ 12 ] proposed to apply the QPT process and plastic forming technology to TRIP steel, and proposed to integrate the research results of martensitic transformation under stress into the QP process to integrate the plastic forming of casting with the QP heat treatment process. Han et al [ 13 ] carried out hot forming and QP treatment on the commercial hot forming material 22MnB5, which improved the performance of the final parts. Ariza [ 14 , 15 ] introduced the QP process of TRIP800 steel into the hot forming process, and carried out thermal simulation tests at different strain temperatures.…”

Section: Introductionmentioning

confidence: 99%

Research on Hot Stamping-Carbon Partition-Intercritical Annealing Process of Medium Manganese Steel

et al. 2023

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In order to improve the plasticity of hot stamping parts, this paper combines the heat treatment process with the plastic forming of sheet metal, and creatively proposes a new process of hot stamping-carbon partitioning-intercritical annealing. The mechanical properties and microstructure are characterized under the newly proposed process, the quenching-partition (QP) process, and the intercritical annealing (IA) process, respectively. The new process firstly undergoes incomplete austenitizing treatment at 610 °C, then carries out distribution treatment while stamping at 300 °C, and finally conducts annealing treatment in critical zone at 680 °C in two-phase zone. The results show that a multi-phase refined microstructure composed of lath martensite, retained austenite, fresh martensite, and carbides are obtained by the new process. Most of the retained austenite is shaped in the thin film due to martensitic shear, in which carbon and manganese elements diffuse from martensite to austenite by heat treatment, thus stabilizing the retained austenite. Retained austenite with a volume fraction of 33.7% is obtained in the new process. The retained austenite with higher content and better stability is completely consumed during the stretching process, which gives full play to discontinuous TRIP effects, thus delivering the elongation of 36.8% and the product of strength and elongation (PSE) reached as high as 43.6 GPa%.

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Section: Introductionmentioning

confidence: 99%

Research on Hot Stamping-Carbon Partition-Intercritical Annealing Process of Medium Manganese Steel

et al. 2023

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“…Speer et al [22] provided a first overview of possible industrial applications of Q&P steels. Han et al [23] showed that the high formability of Q&P steels could be used for high drawing depths, allowing high-quality parts to be produced in a hot forming process. Frohn et al [24] used incremental bending to produce safety parts from a 42SiCr steel with a Q&P heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Process Design for Press Partitioning of the New Q&P Steel 37SiB6

Illgen,

Winter,

Haase

et al. 2023

Metals

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Quenching and partitioning (Q&P) heat treatments of low-alloy steels with exceptional property combinations are particularly promising. In this study, we characterize for the first time a new low-alloy steel to be processed using Q&P heat treatments. In combined experimental and numerical studies, we design a novel approach that effectively combines the short cycle times of press hardening with the excellent property profiles of Q&P-treated steels. We identify an appropriate austenization temperature of 950 °C and a portioning temperature of 250 °C for Q&P heat treatments through dilatometric studies. We adjust a number of reference conditions with fractions of 2.1 to 6.3 wt.% of retained austenite, resulting in tensile strengths up to 1860 MPa and elongations to failure up to 7%. Initial numerical designs of the process can identify varying temperature profiles and cooling rates depending on the position in the die. The results show that the geometry of the part plays a minor role, but the die temperature of 200 °C is the dominant factor for successful partitioning directly in the press hardening process.

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A Comparative Study on Conventional and Hybrid Quenching Hot Forming Methods of 22MnB5 Steel for Mechanical Properties and Microstructure

Eşiyok

Ertan

Sevilgen

et al. 2022

J. of Materi Eng and Perform

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Research on Q&P hot stamping process integrated with fractional cooling strategy

Cited by 7 publications

References 8 publications

Research on Hot Stamping-Carbon Partition-Intercritical Annealing Process of Medium Manganese Steel

Research on Hot Stamping-Carbon Partition-Intercritical Annealing Process of Medium Manganese Steel

Experimental and Numerical Process Design for Press Partitioning of the New Q&P Steel 37SiB6

A Comparative Study on Conventional and Hybrid Quenching Hot Forming Methods of 22MnB5 Steel for Mechanical Properties and Microstructure

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