Microstructure – Toughness relationships in sub-zero treated and tempered Vanadis 6 steel compared to conventional treatment

Ptačinová, Jana; Sedlická, Viktória; Hudáková, Mária; Dlouhý, Ivo; Jurči, Peter

doi:10.1016/j.msea.2017.07.007

Cited by 29 publications

(40 citation statements)

References 49 publications

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“…This suggests that the precipitation behavior of high carbon steels in our study may have a different mechanism when subjected to QCT. Make comprehensive consideration on the two facts: 1) precipitation of SGCs can occur during cryogenic treatment and tempering, 2) the results of tempering curves imply that the precipitation behavior during tempering of QCT is less dramatic than QT. Therefore, it indirectly proves that a part of SGCs may precipitate during the cryogenic treatment, which can ensure the increase of SGCs in total after QCT.…”

Section: Discussionmentioning

confidence: 99%

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On the Optimization of Microstructure and Mechanical Properties of CrWMn Tool Steel by Deep Cryogenic Treatment

Misra

Chen

et al. 2019

steel research int.

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The authors explore here the influence of cryogenic treatment on the microstructure and mechanical properties of CrWMn tool steel. Compared to the normal quenching and tempering process, the tensile strength, toughness, and hardness is enhanced after quenching‐cryogenic‐tempering treatment. The result is attributed to the high number density of precipitated ultra‐fine small granular carbide (SGC), the transformation of retained austenite, and the refinement of the martensite. Two types of retained austenite (filmy and blocky) would transform at low temperature or during the tempering process. Results of tempering curves indirectly prove that a part of SGCs precipitates during the deep cryogenic treatment. The wear resistance is improved and the friction coefficient is decreased by adding cryogenic treatment. The excellent wear resistance after cryogenic treatment is ascribed to the enhancement of hardness and low friction coefficient. The extra precipitation of small granular carbides induced by cryogenic treatment contributes to the wear resistance.

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Section: Discussionmentioning

confidence: 99%

“…The precipitation is expected to be impacted by DCT. Compared to normal quenched and tempered microstructure, carbide precipitation is promoted and number density of small globular carbides tends to increase by DCT …”

Section: Introductionmentioning

confidence: 99%

On the Optimization of Microstructure and Mechanical Properties of CrWMn Tool Steel by Deep Cryogenic Treatment

Misra

Chen

et al. 2019

steel research int.

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“…The base material used in the present experiments is a high alloyed tool steel X153CrMoV12 used in the engineering industry. It is a chromium-vanadium steel with the high hardenability suitable for quenching in oil and air [9]. The steel is characterized by the high wear resistance and very high tensile strength (up to 2180 MPa), being mostly used for cutting tools, such as stretching and extruding mandrels, profile blades and complex shaped milling cutters.…”

Section: Methodsmentioning

confidence: 99%

“…Finally, at the point [ε ss , σ ss ] the curve reaches a steady state, at which a dynamic equilibrium occurs between hardening and softening process in a deformed material. Dilatometry makes it possible to perform the pressure tests under defined conditions, in terms of temperature, strain and strain rate in order to acquire high temperature deformation stress-strain curves [9][10][11]. Some currently produced steels with extreme high content of carbide forming elements are widely known as ledeburitic steels [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Process Analysis and Modelling of X153CrMoV12 Steel

Krbaťa

Eckert

Križan

et al. 2019

Metals

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Analysis of the high temperature plastic behavior of high-strength steel X153CrMoV12 was developed in the temperature range of 800–1200 °C and the deformation rate in the range of 0.001–10 s−1 to the maximum value of the true strain 0.9%. Microstructural changes were observed using light optical microscopy (LOM) as well as atomic force microscopy (AFM). The effect of hot deformation temperature on true stress, peak stress and true strain was evaluated from the respective flow curves. Based on these results, steel transformation was discussed from the dynamic recovery and recrystallization point of view. Furthermore, a present model, taking into account the Zener–Hollomon parameter, was developed to predict the true stress and strain over a wide range of temperatures and strain rates. Using constitutive equations, material parameters and activation energy were derived, which can be subsequently applied to other models related to hot deformation behavior of selected tool steels. The experimental data were compassed to the ones obtained by the predictive model with the correlation coefficient R = 0.98267. These results demonstrate an appropriate applicability of the model for experimental materials in hot deformation applications.

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“…e toughness and fracture toughness are, however, worsened [23], except the cases where the steels are high-temperature tempered [24,25].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Hardness of Cold Work Vanadis 6 Steel after Subzero Treatment at −140°C

Ďurica

Ptačinová

Hudáková

et al. 2018

Advances in Materials Science and Engineering

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e microstructure, phase constitution, and hardness of Cr-V ledeburitic tool steel Vanadis 6 subjected to subzero treatment at −140°C and for different soaking times have been investigated. e light microscopy, scanning electron microscopy, and X-ray diffraction have been used for microstructural investigations. e hardness has been evaluated by the Vickers method. e obtained results assist to draw that subzero treatment reduces the retained austenite amount and increases the population density of carbides, compared to conventional heat treatment. e extent of decrease in the retained austenite amount makes around 85%, and the increase in population density of small globular carbides was approximately fivefold. High compressive stresses were identified in the retained austenite, and their values follow the increase in carbide count. is makes a serious support to the theory explaining the formation of "extra" carbides as a by-product of more complete martensitic transformation. As a result of the mentioned microstructural changes, the material hardness increased from 875 ± 16 HV 10 up to 954.6 ± 14 HV 10 for conventionally quenched and SZT steels, respectively.

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Microstructure – Toughness relationships in sub-zero treated and tempered Vanadis 6 steel compared to conventional treatment

Cited by 29 publications

References 49 publications

On the Optimization of Microstructure and Mechanical Properties of CrWMn Tool Steel by Deep Cryogenic Treatment

On the Optimization of Microstructure and Mechanical Properties of CrWMn Tool Steel by Deep Cryogenic Treatment

Hot Deformation Process Analysis and Modelling of X153CrMoV12 Steel

Microstructure and Hardness of Cold Work Vanadis 6 Steel after Subzero Treatment at −140°C

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