Prediction and evaluation of optimum quenching temperature and microstructure in a 1300 MPa ultra-high-strength Q&amp;P steel

Gao, Pengfei; Liang, Jiangtao; Chen, Weijian; Li, Feng; Zhao, Zhengzhi

doi:10.1007/s42243-020-00535-5

Cited by 11 publications

(5 citation statements)

References 31 publications

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“…The overall heat treatment is the most important for die steels. The focus of the overall heat treatment lies in the selection of the heating temperature, holding time, and cooling method to achieve the optimal steel performance [ 105 , 106 , 107 ]. It has long been discovered that the properties of steel are affected by changes in temperature.…”

Section: Development In Microstructure Manipulation and Strengthening...mentioning

confidence: 99%

Development Trend in Composition Optimization, Microstructure Manipulation, and Strengthening Methods of Die Steels under Lightweight and Integrated Die Casting

Bao,

Yang,

Dong

et al. 2023

Materials

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In the general environment of lightweight automobiles, the integrated die-casting technology proposed by Tesla has become the general mode to better achieve weight reduction in automobiles. The die-casting mold required by integrated die-casting technology has the characteristics of large scale and complexity. Hence, higher requirements are put forward for the comprehensive performance of the die steel. Despite the stagnation in the progress of conventional strengthening methods, enhancing the performance of die steel has become increasingly challenging. Indeed, it necessitates exploring novel die steel and optimizing heat treatment and reinforcement technologies. This article summarizes and analyzes the development status of die steel and corresponding heat treatment and microstructure manipulation as well as strengthening methods and elaborates on an excellent nano-strengthening technology. Furthermore, this review will aid researchers in establishing a comprehensive understanding of the development status of die steel and the processes utilized for its strengthening. It will also assist them in developing die steel with improved comprehensive performance to meet the high demand for mold steel in the integrated die-casting technology of the new era.

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Section: Development In Microstructure Manipulation and Strengthening...mentioning

confidence: 99%

Development Trend in Composition Optimization, Microstructure Manipulation, and Strengthening Methods of Die Steels under Lightweight and Integrated Die Casting

Bao,

Yang,

Dong

et al. 2023

Materials

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“…These observations led to adaptations of the CCE model taking into account competing processes. [12][13][14][15][16] The application of the CCE model to describe the carbon partitioning process during the application of Q&P heat treatments to stainless steels has been less investigated than in carbon steels. Several authors have found that the CCE model is not directly applicable to stainless steels due to the presence of competing reactions.…”

Section: Introductionmentioning

confidence: 99%

“…These observations led to adaptations of the CCE model taking into account competing processes. 12–16…”

Section: Introductionmentioning

confidence: 99%

Microstructure development of quenching and partitioning-processed martensitic stainless steels with different manganese content

Li,

Kwakernaak,

Smith

et al. 2024

Materials Science and Technology

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This work presents an investigation of the microstructure development during the application of the quenching and partitioning (Q&P) process to two stainless steels with different Mn content. The results are compared with calculations based on the constrained carbon equilibrium theory, paying special attention to the presence of reactions competing for the carbon available for partitioning and to the effect of alloying element segregation. Results show that chromium carbides must be considered when accounting for the carbon available for austenite stabilisation. Moreover, manganese/chromium segregation bands play an important role in the microstructure development, particularly in martensite formation, with important consequences in the microstructure development during the following processing steps.

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“…[9][10][11][12][13] Previous studies have indicated that the partial austenitization Q-P process may provide superior overall mechanical properties for the experimental steel than the full austenitization Q-P process, and that the quenching temperature (QT) has a greater impact on the composition of the room temperature microstructure. [14] Microalloying elements can not only drag solute atoms, but also improve matrix and refine grain through precipitated carbides. More and more researchers add microalloying elements such as Nb, Ti, and V to develop new materials.…”

mentioning

confidence: 99%

Effect of Quenching Temperature on the Strengthening Mechanism of Low‐Carbon Microalloyed Quenching and Partitioning Steel

Chu

Chen

Liu

et al. 2022

steel research int.

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Herein, the microstructures of the low‐carbon microalloyed quenching and partitioning (Q–P) steels are multiphase with ferrite (F), martensite (M), and retained austenite (RA) at different quenching temperatures (QTs), i.e., 140, 180, 240, and 300 °C. The volume fraction of fresh martensite (FM) increases from 8.6% to 61.4%, but the tempered martensite (TM) decreases from 49.7% to 0% with the QT increase. Meanwhile, the size of the precipitates (Nb, Ti)C tends to increase, whereas the fraction of the precipitates decreases first and then increases. With the increase of the QT, the yield strength (YS) decreases, the tensile strength (TS) increases, and the elongation first increases and then decreases. Additionally, the strengthening mechanism of Q–P steel is quantitatively analyzed in terms of F, M, RA, and precipitation strengthening. This study shows that F makes the same contribution to YS for the tested steels. The major strengthening mechanism of the Q–P steel is contributed by M, which accounts for about 43.7% to 56.0% of total YS. RA greatly influences the plasticity of Q–P steel and provides little to YS. With an increase in QT, the precipitation strengthening values first decrease and then increase.

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Prediction and evaluation of optimum quenching temperature and microstructure in a 1300 MPa ultra-high-strength Q&P steel

Cited by 11 publications

References 31 publications

Development Trend in Composition Optimization, Microstructure Manipulation, and Strengthening Methods of Die Steels under Lightweight and Integrated Die Casting

Development Trend in Composition Optimization, Microstructure Manipulation, and Strengthening Methods of Die Steels under Lightweight and Integrated Die Casting

Microstructure development of quenching and partitioning-processed martensitic stainless steels with different manganese content

Effect of Quenching Temperature on the Strengthening Mechanism of Low‐Carbon Microalloyed Quenching and Partitioning Steel

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