Effect of the chemical composition and austenitizing conditions on the hardenability of 35GR steel

Потапов, А. И.; Malikov, I. T.; Urazov, V. I.; Semin, A. E.

doi:10.1134/s0036029510120190

Cited by 2 publications

(1 citation statement)

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“…The main research methods mainly include the end quenching and CCT curve methods. Alloying elements can effectively improve the hardenability of steel [8][9][10][11][12], high heating temperature and long holding time in austenitizing can shift the C curve to the right and improve the hardenability [13,14], larger austenite grains also improve hardenability [15]. In recent years, controlled rolling and cooling technology has been used in steel production to diversify the microstructure of steel.…”

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confidence: 99%

Study on the effect of microstructure change of 20CrNiV5 high strength and toughness steel on hardenability

Li,

Song,

Xia

et al. 2024

J. Phys.: Conf. Ser.

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High-pressure and high-load drilling environment in the deep soil requires high strength and toughness of the oil well pipe, so the oil well pipe steel must be heat-treated, and the hardenability of the steel is particularly important in manufacturing. In this paper, Gleeble-3500 thermal simulator is used to measure the CCT curves of 20CrNiV5 steel, and the influence of microstructure on hardenability is studied. Deformation inhibits the martensitic transformation of the steel and leads to the decrease of its hardenability; the inhomogeneity of the steel pipe after hot forming also has an important impact on the hardenability, and the multiphase microstructure of bainite and ferrite after hot rolling leads to austenitic heating. Austenite grains are small and uneven, which reduces the hardenability of the steel. The microstructure of the inner and outer layers of the hot-formed steel pipe is smaller than that of the middle layer. After heat treatment, its smaller austenite results in weak hardenability.

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