Prediction of as-quenched hardness after rapid austenitization and cooling of surface hardened steels

Réti, Tamás; Bagyinszki, Gyula; Felde, Imre; Verő, Balázs; Bell, T.

doi:10.1016/s0927-0256(98)00128-1

Cited by 23 publications

(18 citation statements)

References 4 publications

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“…The hardness of the quenched layer is substantially greater than that of conventionally quenched and tempered (with an average hardness HRC 60) [4] . The hardened layer of laser treated block has a thickness of 0.35 mm.…”

Section: K=m/plmentioning

confidence: 89%

Wear performance of laser surface hardened GCr15 steel

Lei

Quan-kun

et al. 2010

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Section: K=m/plmentioning

confidence: 89%

Wear performance of laser surface hardened GCr15 steel

Lei

Quan-kun

et al. 2010

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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“…This work perfectly illustrates the time dependence of the austenitic transformation (variation of the phase change temperatures) and its diffusive nature in the case of AISI4140 steel. Similarly, Reti et al (1999) explain that the issue is the same during a surface heating by induction. The problem here is that, during a short cycle induction heating of 50 CrMo 4 steel, homogenous austenite may not be obtained.…”

Section: Introductionmentioning

confidence: 92%

“…The proportion of transformed phase and so the steel hardness obtained after induction heating and rapid quenching are functions of heating time and final heating temperature. So, Reti et al (1999) suggests a new phenomenological model and computational method to take into account this kinetic aspect.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of surface martensite-austenite transformation during finish turning of an AISI S15500 stainless steel

Mondelin¹,

Rech²,

Feulvarch³

et al. 2014

IJMMM

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International audienceDuring machining, extreme temperature conditions appear in the cutting zone (from 700 to 1,000°C with heating rates around 106 °C/s). Consequently, the metallurgical models used to simulate the impact of the manufacturing process must be adapted to this fast thermal kinetics. Stress-free dilatometry tests have been performed to determine the austenisation kinetics of an AISI S15500 martensitic stainless steel and to identify a phenomenological model. Experimental heating rates vary from 6 °C/s to 11,000 °C/s. The metallurgical model calibrated for high heating rates, has been applied to a typical machining thermal cycle. It has been shown that martensite→austenite transformation does not have the time to significantly occur during the finish turning of AISI S15500 under standard cutting conditions. This result has been confirmed using retained austenite measurements in the machined surface layer

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“…One consequence of this is that in many steel diffusion is unavoidable during heating, so incredibly high heating rates are needed in order to induce displacive transformation during heating. Austenite formation can be induced in incredibly small time periods using laser heating [10][11][12][13]. …”

Section: Qualitative Fundamentalsmentioning

confidence: 99%

“…This is because the austenite does not need to be cooled rapidly, thus avoiding the development of quench stresses [9,10].…”

Section: Long Transformation Timesmentioning

confidence: 99%

Very Short and Very Long Heat Treatments in the Processing of Steel

Bhadeshia

2010

Materials and Manufacturing Processes

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It is conventionally assumed in the mass production of steels that the processing time must be reasonable and that the material must have uniform properties. The consequence is that short heat-treatments cannot be tolerated since the scale of engineered products may be so large that uniform temperatures cannot be achieved. Similarly, thermal treatments requiring several days or weeks are not considered practical because of productivity concerns.In this paper I will show that these conservative ideas are a huge disadvantage to the creation of radically different steels whose manufacture could lead to an improvement in the quality of life. Indeed, such steels are capable of wiping out the competition from newcomers in the field of structural materials, such as the infamous carbon nanotubes and metal-matrix composites.

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Prediction of as-quenched hardness after rapid austenitization and cooling of surface hardened steels

Cited by 23 publications

References 4 publications

Wear performance of laser surface hardened GCr15 steel

Wear performance of laser surface hardened GCr15 steel

Characterisation of surface martensite-austenite transformation during finish turning of an AISI S15500 stainless steel

Very Short and Very Long Heat Treatments in the Processing of Steel

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