Effect of Cooling Rate on the Solidification Microstructure and Characteristics of Primary Carbides in H13 Steel

“…The ladle refining was then carried out with CaF2-and CaO-based slag. Meanwhile, the concentrations of Mao et al studied the influence of the cooling rate on the primary carbide and found that a higher cooling rate would contribute to the decrease of size and area of primary carbide [14]. The addition of alloy elements, such as magnesium and cerium, were also confirmed to be beneficial for the refining of the primary carbide in the AISI H13 steel [10,15].…”

Section: Preparation Of the Esr Ingotmentioning

confidence: 99%

“…In order to explain why the V-rich primary carbide is in favor of the nucleation on the Al 2 O 3 inclusion and the Mo-rich primary carbide tends to precipitate on the MnS inclusion, the disregistries between the primary carbide and the corresponding inclusion were calculated. Here, the V-rich primary carbide is identified as VC and Mo-rich primary carbide is identified as Mo 2 C [14]. The parameters are shown in Table 2, and the matching model refers to [19].…”

Section: Heterogeneous Nucleation Of Primary Carbidementioning

confidence: 99%

“…Except for the disregistry, the substrate should be in solid state when it acts as the nucleation site. The formation reaction of the Al2O3 inclusion, MnS inclusion, VC and Mo2C, as well as the equilibrium constant K, are described as follows [14,20,21]:…”

Section: Vc Mo 2 C Al 2 O 3 Mnsmentioning

confidence: 99%

“…Not only could the primary carbide decrease the strength, the toughness, and the fatigue performance, but also the primary carbide would act as the initiation site of breakage during the machining process [11][12][13]. Mao et al studied the influence of the cooling rate on the primary carbide and found that a higher cooling rate would contribute to the decrease of size and area of primary carbide [14]. The addition of alloy elements, such as magnesium and cerium, were also confirmed to be beneficial for the refining of the primary carbide in the AISI H13 steel [10,15].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Primary Carbides in a Commercial-Sized Electroslag Remelting Ingot of H13 Steel

Wang

Liu

et al. 2019

Metals

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The characteristics of primary carbides in a commercial-sized (one ton) electroslag remelting (ESR) ingot of AISI H13 steel were investigated. The interaction between the primary carbides and inclusions was also clarified. The results indicate that there are two types of primary carbides, V-rich and Mo-rich primary carbides, in the H13 ESR ingot. The quantity, the area fraction, and the size of the two primary carbides tend to decrease from the center of the H13 ESR ingot to the outer surface. Additionally, the V-rich primary carbide is obviously larger than the Mo-rich primary carbide. The Al 2 O 3 inclusion can promote the precipitation of the V-rich primary carbide, while the MnS inclusion encourages the precipitation of Mo-rich primary carbide. The CaO·Al 2 O 3 inclusion cannot act as the nucleation site for the precipitation of the two primary carbides. The solid fraction that the V-rich primary carbide begins to precipitate ranges from 0.965 to 0.983, and that for the Mo-rich primary carbide and the MnS inclusion change from 0.9990 to 0.9998 and from 0.989 to 0.990, respectively.

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Microstructural Evolution during Homogenization and Hot Deformation for As‐Cast H13 Steel

Han

Ren

et al. 2020

steel research int.

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The hot compression experiments are accomplished to investigate the microstructural evolution of as‐cast H13 steel during homogenization treatment and hot deformation. At a certain homogenization temperature, the dynamic recrystallization (DRX) volume fraction increases with increasing strain and deformation temperature and decreasing strain rate. However, the DRX is also easy to proceed at a high strain rate of 5 s−1 due to the high shear stress. The recrystallization is inhibited in a dendrite segregation region. The residual dendrite segregation left after homogenization treatment will improve the recrystallization nucleation rate during the subsequent deformation. The recrystallization grains preferentially nucleate in the dendrite region, and the grain growth is inhibited by the dendrite segregation. The partial homogenization before deformation is beneficial to achieve the fine microstructure.

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Effect of Cooling Rate on the Solidification Microstructure and Characteristics of Primary Carbides in H13 Steel

Cited by 58 publications

References 26 publications

Distribution Characteristics and Thermal Stability of Primary Carbide in Cast Ce-H13 Steel

Distribution Characteristics and Thermal Stability of Primary Carbide in Cast Ce-H13 Steel

Investigation of Primary Carbides in a Commercial-Sized Electroslag Remelting Ingot of H13 Steel

Microstructural Evolution during Homogenization and Hot Deformation for As‐Cast H13 Steel

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