Effect of finish rolling temperature on microstructures and mechanical properties of 1000 MPa grade tempered steel plate for hydropower station

Li, Changsheng; Chen, Jie; Tu, Xingyang; Han, Yahui

doi:10.1016/j.jmapro.2021.04.039

Cited by 17 publications

(2 citation statements)

References 32 publications

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“…The tensile strength, yield strength, total elongation and impact energy at -40°C of the FRT-700 sample are 1701 MPa, 1171 MPa, 12% and 38 J, respectively. With the previous study reported [20], the martensite structure transformed from pancaked prior austenite exhibited higher proportion of high misorientation boundary and greater dislocation density. The FRT-700 sample with higher dislocation density has the stronger dislocation strengthening due to the liner relationship between yield strength and the square root of dislocation density [21][22][23].…”

Section: Microstructure and Propertiessupporting

confidence: 54%

Dry sliding wear behaviour of hot-rolled air-cooled medium manganese martensitic steel

Han

Yang

et al. 2023

Materials Science and Technology

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The microstructure, mechanical properties and dry sliding wear behaviour of hot-rolled air-cooled medium manganese martensitic steel at different finish rolling temperatures (FRT) were investigated. The fully martensitic structure with precipitation of acicular carbides in the matrix was obtained in the air-cooled process after hot rolling. With the decrease of FRT, the mechanical properties and sliding wear resistance of experimental steels were significantly improved. The worn surface morphology was mainly furrows, and the wear mechanism was micro-cutting. Both the width and depth of the furrows increased with the increasing hardness of the experimental steels. The mass loss rates of FRT-700, FRT-900 and Hardox450 samples were 4.53 × 10-4 g/m, 4.82 × 10-4 g/m and 5.14 × 10-4 g/m, respectively.

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Section: Microstructure and Propertiessupporting

confidence: 54%

Dry sliding wear behaviour of hot-rolled air-cooled medium manganese martensitic steel

Han

Yang

et al. 2023

Materials Science and Technology

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“…Meng et al [14] systematically studied the mechanical properties of FSS with different quenching and partitioning processes, and an AISI 430 with both high strength and good plasticity was achieved by a recrystallization annealing before quenching and partitioning process. The variation of mechanical properties of cold-rolled FSS 430 during continuous annealing process was investigated by Zhang et al [15], and the effects of the annealing temperature on the strength, elongation and anisotropy properties of FSS 430 were analyzed based on a series of rolling tests. The effects of intercritical annealing process on microstructure and tensile properties of cold-rolled 7Mn steel was investigated by Yang et al [16].…”

Section: Introductionmentioning

confidence: 99%

An analysis of microstructure and mechanical properties of ferritic stainless steel 430 during cold rolling and subsequent annealing

Sun

et al. 2022

Int J Adv Manuf Technol

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Systematic study on the microstructural evolution and mechanical properties of ferritic stainless steel (FSS) 430 with different annealing processes were carried out in the present work. The results show that microstructural re nement can be achieved by optimization of annealing processes, improving elongation, yield strength and tensile strength of FSS 430. An optimal annealing temperature of 950 ℃ is found with better homogeneity and enhanced mechanical properties among the cold-rolled and annealed FSSs. During annealing processes, the fraction of high angle grain boundaries of FSS 430 annealed at 950 ℃ is found to be the highest, indicating that a homogeneous microstructure with high recrystallization rate is formed inside the FSS 430 strips. In addition, high fraction of the hard grains (SF < 0.4) and low fraction of the soft grains are found inside FSS 430 annealed at 950 ℃, improving the plasticity of material. Overall, the optimization of annealing processes bene ts the microstructural re nement of FSS and thereby improving the mechanical properties of materials.

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Effect of Controlled Rolling on the Strength and Toughness of Low‐Alloy Martensitic Steel

Tang,

Zhao,

et al. 2024

steel research int.

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Low‐carbon martensitic steel is the key material of automobile lightweight. Unfortunately, the strategies for increasing the material strength, such as processing to create line defects (dislocations), tend to decrease the ductility. Herein, a strategy to circumvent this problem in an inexpensive, microalloy low‐carbon (0.32%) martensitic steel by regulating the accelerated cooling stop temperature after hot rolling is developed. Steel with fine austenite grains embedded in a highly dislocated martensite matrix is developed by cold rolling followed by saltwater quenching and low‐temperature tempering. This deformed process produces dislocation hardening, but retains high ductility both through the glide of intensive mobile dislocations. The proposed strategy provides a pathway for the development of high‐strength, high‐ductility materials.

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Effect of finish rolling temperature on microstructures and mechanical properties of 1000 MPa grade tempered steel plate for hydropower station

Cited by 17 publications

References 32 publications

Dry sliding wear behaviour of hot-rolled air-cooled medium manganese martensitic steel

Dry sliding wear behaviour of hot-rolled air-cooled medium manganese martensitic steel

An analysis of microstructure and mechanical properties of ferritic stainless steel 430 during cold rolling and subsequent annealing

Effect of Controlled Rolling on the Strength and Toughness of Low‐Alloy Martensitic Steel

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