Effects of Pre‐Processing on Thixoformability of Steel Grade 100Cr6

Bülte, Raimund; Bleck, Wolfgang

doi:10.1002/srin.200405815

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…There has been interest in whether steel can be thixoformed in the standard state in which it is received from a steel supplier. Bulte and Bleck [22] compared the microstructure after quenching from the semisolid state for 100Cr6 rolled bar, laboratory cast billet and laboratory cast billet with liquid core reduction. They found no significant difference and therefore suggest primary as-cast billet can be used.…”

Section: Routes To Thixoformable Starting Materialsmentioning

confidence: 99%

A review of the semi-solid processing of steel

Atkinson

Rassili

2010

Int J Mater Form

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Steel is a particularly challenging material to semi-solid process because of the high temperatures involved and the potential for surface oxidation. Here the experience of semi-solid processing will be reviewed and the current situation in relation to commercial application assessed. The review will include discussion of the range of potential steel materials which are amenable to thixoforming including thermodynamic prediction of suitable alloy compositions.

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Section: Routes To Thixoformable Starting Materialsmentioning

confidence: 99%

A review of the semi-solid processing of steel

Atkinson

Rassili

2010

Int J Mater Form

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“…Various researchers have demonstrated that some metals can be subjected to a direct partial melting route from their as-received state (without any special treatment) in order to obtain a thixoformable microstructure (e.g. 7075 aluminum alloys (Chayong et al, 2005), 100Cr6 (Bulte and Bleck, 2004), M2 (Omar et al, 2009) and HP9/4/30 (Omar et al, 2005)).…”

Section: Introductionmentioning

confidence: 99%

Microstructure investigation and flow behavior during thixoextrusion of M2 steel grade

Pesci

Langlois

et al. 2015

Journal of Materials Processing Technology

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The microstructure investigation and flow behavior during thixoforging of M2 steel parts were investigated. Partial remelting was performed at processing temperatures ranging from 1290 • C to 1340 • C corresponding to a liquid fraction range between 10% and 30% (according to differential scanning calorimetry measurements and quantitative image analyses). A conventional microstructure for thixoforming process was obtained: spherical solid grains surrounded by liquid phase. The microstructure across the heated billets was relatively homogeneous with bigger grain size near the surface. Successful thixoextrusion for producing parts was finally achieved at processing temperatures. By investigating the microstructure and load-displacement curves, different mechanisms in various forming stages were proposed.

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“…The recrystallization and partial melting (RAP) [5] and strain-induced melt-activated (SIMA) [6] are the more established solid state feedstock preparation routes. Recently, it was shown that tool steel X210CrW12 and M2 [7], stainless steel with a peritectic reaction [8], 100Cr6 [9] and C38 [10] could be subjected to a direct partial re-melting route, from their as-received conditions, to obtain a thixoformable microstructure. The volume fraction of solid phase and its distribution are important microstructure parameters that remain to be investigated, especially at low liquid fractions, because they crucially influence the rheological behavior [11] and therefore the flow behavior of a material during its forming [12].…”

Section: Introductionmentioning

confidence: 99%

<i>In Situ</i> Microstructure Observation of Steel Grades in the Semi-Solid State for Thixoforging Process by Using Confoncal Laser Scanning Microscopy

Pesci

Becker

et al. 2014

SSP

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It is necessary to well understand the microstructure evolution during high speed heating and forming for steel thixoforging, since it determines the thixotropic flow behavior of materials in the semi-solid state. A new in situ technique - high temperature Confocal Laser Scanning Microscopy (CLSM) - was developed and used for studying the microstructure evolution directly at high temperature where the microstructure in the semi-solid state could not be preserved by quenching experiments for conventional 2D characterization. Several steel grades (C38LTT, 100Cr6 and M2) were investigated during heating from the as-received state to the semi-solid state and finally cooled to the solid state).It has been found that there is a significant difference in diffusion rate of alloying elements between these grades during heating and cooling. In M2, thanks to the high content of alloying elements and their low diffusion rate, the semi-solid temperature range is greater and its microstructure in the semi-solid state could be preserved by quenching or even at a low cooling rate, which means the microstructure of M2 in the semi-solid state can be characterized in room temperature on quenched M2 samples. On the contrary, the microstructure of other steel grades 100Cr6 and C38LTT in semi-solid state can only be revealed by CLSM at high temperature because of the lower volume fraction of alloying elements and their high diffusion rate. It is very interesting to use high temperature CLSM to in situ investigate the microstructure evolution in the semi-solid state, especially at low liquid fraction.

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Effects of Pre‐Processing on Thixoformability of Steel Grade 100Cr6

Cited by 6 publications

References 7 publications

A review of the semi-solid processing of steel

A review of the semi-solid processing of steel

Microstructure investigation and flow behavior during thixoextrusion of M2 steel grade

<i>In Situ</i> Microstructure Observation of Steel Grades in the Semi-Solid State for Thixoforging Process by Using Confoncal Laser Scanning Microscopy

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