Effect of Austenitization Process on Oxidative Decarbonization Behavior and Mechanical Properties of 22MnB5 Steel

Li, Bibo; Chen, Ying; Zhao, Xiaolong; Li, Jikang; Wang, Chang; Wang, Maoqiu

doi:10.1007/s11665-023-07985-4

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…Oxide scales will increase the loss of steel, cause iron oxide to press into the steel surface, cause wear and tear on the die, and reduce the service life of hot stamping equipment [5]. Oxidation can often be decreased by adjusting the hot-stamping process [6,7], by alloying [8,9], or by using protective measures [10][11][12]. Zhao et al [13] designed a new hot-stamping steel with a high Cr: Si ratio.…”

Section: Introductionmentioning

confidence: 99%

Effect of Batch-Annealing Temperature on Oxidation of 22MnB5 Steel during Austenitizing

Liu

Chen

et al. 2023

Metals

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In this paper, the effect of batch-annealing temperature on the oxidation of 22MnB5 steel during austenitizing was studied. When the batch-annealing temperature was decreased from 690 to 680 °C, the surface roughness of cold-rolled 22MnB5 steel decreased, which reduced the oxide layer thickness during the subsequent austenitizing process and had little effect on the mechanical properties in the cold-rolled and quenched state. This indicated that oxidation during austenitizing could be reduced by properly reducing the batch-annealing temperature without affecting the mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Effect of Batch-Annealing Temperature on Oxidation of 22MnB5 Steel during Austenitizing

Liu

Chen

et al. 2023

Metals

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Strength, microstructure and bonding mechanism of borosilicate glass-to-SA105 carbon steel seals

Liu,

Cai,

Gong

et al. 2024

Mater. Res. Express

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The bonding strengths, microscopic characteristics and fracture properties of borosilicate glass-to-SA105 carbon steel seals were investigated, and two different glass-to-metal bonding mechanisms were compared. First, a mechanical interlocking mechanism was found via precipitates formed from chemical reactions at the interface of the seal bonded to unoxidized SA105 carbon steel. Second, a transitional layer mechanism was proven by the dissolution of metal oxides, which was on the surface of preoxidized SA105 carbon steel, into the glass. The bonding strength results showed that both mechanisms effectively contributed to the joining of dissimilar phases, but the effect of the latter mechanism was more prominent than that of the former mechanism. Various microstructures and chemical compositions of the surface oxide scales were obtained by applying different preoxidation conditions to SA105 carbon steel. Additionally, different sealing interfaces were reported through this process. The width of the interfacial transitional layer ranged from 0.5 μm to 1.5 μm, and the strength of the seal was closely related to this width. The sealing of SA105 carbon steel that was preoxidized at 800 °C for 30 min with a moderate width of the transitional layer had an optimal shear strength of 25.4 MPa. However, a wide transitional layer composed of the remaining oxide scales deteriorated the strength of the seal. In addition, fracture analysis of the seals after the shear test was conducted, and the intrinsic correlations between the macroscopic shear strength and microscopic bonding mechanism were established. The present work should provide a reference for the testing and analysis of bonding strength in joining dissimilar materials.

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Effect of Plate Thickness on the Laser-Welded Microstructure and Mechanical Properties of 22MnB5 Hot-Forming Steel

Sang,

Li,

Zhang

et al. 2024

Materials

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To meet the development and application needs of advanced high-strength steel, the laser welding of 22MnB5 hot-forming steel plates with thicknesses of 2 mm, 3 mm, and 4 mm was studied in this paper. Mechanical testing revealed that as plate thickness increased, the tensile strength of welded joints decreased from 1489 MPa to 1357 MPa and 1275 MPa, equating to 96%, 91%, and 88% of the corresponding base metal strength, respectively. The heat-affected zone exhibited the lowest mechanical properties. Microstructural characterization showed that with increasing plate thickness, martensite grains in the welded joints grew larger, transitioning from fine acicular to larger island structures. Concurrently, dislocation density in the welded joints decreased gradually. Furthermore, microstructural changes in the heat-affected zone were more pronounced than those in the fusion zone. The larger grain size and reduced dislocation density softened the joint structure, which consequently decreased the strength and hardness of the welded joint. Laser-welded joints of three thicknesses can exceed 85% of the corresponding base metal strength, demonstrating strong industrial application potential.

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Effect of Austenitization Process on Oxidative Decarbonization Behavior and Mechanical Properties of 22MnB5 Steel

Cited by 3 publications

References 23 publications

Effect of Batch-Annealing Temperature on Oxidation of 22MnB5 Steel during Austenitizing

Effect of Batch-Annealing Temperature on Oxidation of 22MnB5 Steel during Austenitizing

Strength, microstructure and bonding mechanism of borosilicate glass-to-SA105 carbon steel seals

Effect of Plate Thickness on the Laser-Welded Microstructure and Mechanical Properties of 22MnB5 Hot-Forming Steel

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