The influence of deformation and cooling parameters after transition through semi-solid state on structure development of ledeburite steel

Aišman, David; Jirková, Hana; Mašek, Bohuslav

doi:10.1016/j.jallcom.2012.02.028

Cited by 13 publications

(11 citation statements)

References 4 publications

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“…The liquidus temperature was found to be 1416 °C. The parameters used in the experimental programme were based on these results and on previous trials with this material [7,12,13].…”

Section: Determination Of Semi-solid Processing Parametersmentioning

confidence: 99%

“…Their resultant microstructures only after semi-solid processing consist of polyhedral austenite grains embedded in a ledeburite network [11,12]. The grain size and the morphology of the ledeburite network can be controlled by cooling [13]. Some studies dealt with behavior of the semi-solid structure after heat treatment and describe the stages of the austenite decomposition [11,13].…”

Section: Introductionmentioning

confidence: 99%

“…The grain size and the morphology of the ledeburite network can be controlled by cooling [13]. Some studies dealt with behavior of the semi-solid structure after heat treatment and describe the stages of the austenite decomposition [11,13]. It is known that the austenite is stable up to annealing at 500 • C. At this temperature the formation of fine pearlite was observed [7,11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of the Parameters of Semi-Solid Processing on the Elimination of Sharp-Edged Primary Chromium Carbides from Tool Steel

Jirková

Rubešová

Konopík

et al. 2018

Metals

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Although conventional tool steels have been heat treated on a routine basis for decades, the search continues for new ways to eliminate their troublesome sharp-edged primary chromium carbides, which impair toughness. One of the available techniques is semi-solid processing, which involves partial melting of the workpiece. The structure after semi-solid processing consisted of a austenite and carbide-austenite network. The network can be broken up and its fragments distributed uniformly by subsequent forming with appropriate parameters. In this experimental study, X210Cr12 tool steel was heated to a semi-solid state, and after cooling to a solid state, worked in a hydraulic press. Suitable soaking temperatures were sought within an interval between 1200 °C and 1280 °C. The workpieces were quenched from the forming temperature in water or oil. In order to improve formability and reduce hardness, tempering was tested as well. Additional experimental regimes included conventional quenching and tempering. Once the appropriate parameters were chosen, the elimination of primary chromium carbides was successful. The resultant microstructures were fine and consisted of M-A constituent with a size of approximately 1 μm, and very fine Fe3C and Cr7C3 carbides. The hardness was in excess of 800 HV10. They were examined using optical and scanning electron microscopes. The carbides were characterized on transparent foils in a transmission electron microscope. Mechanical characteristics were determined in micro-tensile tests.

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“…The liquidus temperature was found to be 1416 °C. The parameters used in the experimental programme were based on these results and on previous trials with this material [7,12,13].…”

Section: Determination Of Semi-solid Processing Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of the Parameters of Semi-Solid Processing on the Elimination of Sharp-Edged Primary Chromium Carbides from Tool Steel

Jirková

Rubešová

Konopík

et al. 2018

Metals

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show abstract

“…This step led to rapid solidification. It had been found earlier that the cooling rate governed the fineness of the lamellar network [10,20]. The third step involved reheating in a furnace to the forming temperature of 1080°C and holding for 1.5 minutes.…”

Section: Determination Of Suitable Processing Parametersmentioning

confidence: 99%

Effect of Heating Temperature During Semi-Solid Processing on Structure of X210cr12 Steel

Jirková¹,

Rubešová

Opatová

et al. 2017

Acta Metall Slovaca

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Semi-solid processing is an unconventional technique, which can be used to produce intricate components by forming and also to remove the sharp-edged carbides. However, the resulting microstructure after semi-solid processing consists of polyhedral austenite grains and lamellar ledeburite network. The network can be fragmented by applying an appropriate deformation sequence during cooling. X210Cr12 tool was experimentally processed by a combination of semi-solid processing and subsequent thermomechanical treatment. The heating temperature was varied from 1200°C to 1280°C. The obtained microstructures consisted of recrystallized grains of the M-A constituent and fine chromium precipitates without sharp-edged carbides with hardness higher than 800 HV10.

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“…By transition through semi-solid state, initial microstructure of the X210Cr12 steel with ledeburite and carbides transforms into one with a high proportion of metastable austenite. If deformation is applied upon the transition through semi-solid state, the resulting austenite microstructure may be refined down to the average grain size of 3 lm [2]. It may be assumed that additional treatment may lead to new types of microstructure with very fine grain.…”

Section: Introductionmentioning

confidence: 99%

Microstructure of tool steel upon combined semi-solid processing and thermomechanical treatment

Mašek

Aišman

Jirková

2014

Journal of Alloys and Compounds

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The influence of deformation and cooling parameters after transition through semi-solid state on structure development of ledeburite steel

Cited by 13 publications

References 4 publications

Effect of the Parameters of Semi-Solid Processing on the Elimination of Sharp-Edged Primary Chromium Carbides from Tool Steel

Effect of the Parameters of Semi-Solid Processing on the Elimination of Sharp-Edged Primary Chromium Carbides from Tool Steel

Effect of Heating Temperature During Semi-Solid Processing on Structure of X210cr12 Steel

Microstructure of tool steel upon combined semi-solid processing and thermomechanical treatment

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