An analysis of combined cyclic heat treatment performance

Smoljan, Božo

doi:10.1016/j.jmatprotec.2004.04.121

Cited by 39 publications

(16 citation statements)

References 6 publications

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“…There are several conventional methods proposed to suppressing g grain memory the in the practical application: (i) normalizing for several thermal cycles; [13][14][15][16] (ii) rapid heating for obtaining globular austenite; [11] and (iii) austenite recrystallization above Ac 3 temperature. [17][18][19][20][21] 9-12% chromium steels are the commonly used material for the large forgings with a maximum diameter of 1440 and 5500 mm in length.…”

Section: Introductionmentioning

confidence: 99%

γ Grain Memory in X12CrMoWVNbN10‐1‐1 Steel

Tao

Han

2015

steel research int.

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γ grain memory of X12CrMoWVNbN10‐1‐1 steel is investigated in order to clarify its mechanism from the viewpoint of the roles of retained γ. “isothermal transformation” is proposed to suppress the γ grain memory. The microstructure characterization during the isothermal transformation is carried out. By in situ optical microscopy observation, the acicular γ grains and globular γ grains nucleated in the interior of prior γ grains and along the prior γ grain boundaries or packet boundaries, respectively, when the sample with martensite matrix is reheated. The coarse γ grains are formed by the growth, impingement and coalescence of acicular γ grains with retained γ between martensite lath. The mechanism of suppressing γ grain memory by isothermal transformation is also discussed. It is demonstrated that the γ grain memory could be suppressed by decreasing the volume fraction (fγ) of retained γ before reheating. The critical upper limit fγ to suppress γ grain memory effectively is approximately 3.2%.

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Section: Introductionmentioning

confidence: 99%

γ Grain Memory in X12CrMoWVNbN10‐1‐1 Steel

Tao

Han

2015

steel research int.

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“…Up to now, some investigations have been carried out on the behaviors of 42CrMo steel [17]. Smoljan [18] found that it is possible in effective way to improve a steel strength and toughness by the combined cyclic heat treatment. The increasing of both yield strength and Charpy-V notch toughness is achieved due to structure [19] developed an artificial neural network (ANN) model to predict the constitutive flow behaviors of 42CrMo steel during single-pass hot deformation.…”

Section: Introductionmentioning

confidence: 99%

The kinetics of dynamic recrystallization of 42CrMo steel

Chen

Lin

2012

Materials Science and Engineering: A

174

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“…In the past, many investigations have been carried out on the behaviors of 42CrMo steel (Limodin and Verreman, 2006). Smoljan (2004) found that it is possible in effective way to improve a steel strength and toughness by the combined cyclic heat treatment consisted of temperature cycling followed by twice quenching. The increasing of both, yield strength and Charpy-V notch toughness are achieved due to structure refinement.…”

Section: Introductionmentioning

confidence: 99%