Heat Treatment with Gaseous Atmospheres

Grosch, J.

doi:10.1002/chin.200724213

Cited by 2 publications

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Section: Introductionsupporting

confidence: 53%

“…This mechanism is known from case hardening of steels with a solid carbon donor, also known as pack carburisation. 12,13 The feasibility of this assumption was corroborated in former studies. 14,15 This study examines the development of intermetallic and carbidic precipitate phases after sintering at different temperatures by means of powder X-ray diffraction (XRD) and additional scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS).…”

Section: Introductionmentioning

confidence: 53%

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Comprehensive investigation of phase transformation during diffusion alloying of Nb-rich powder metallurgical tool steels

et al. 2015

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Stainless tool steels highly alloyed in niobium can be produced by powder metallurgy using diffusion alloying. Steel powder atomised without carbon is subsequently mixed with graphite and hot isostatically pressed. The atomised powder contains the intermetallic Laves phase NbFe 2 that transforms into MC-type carbides during HIP when graphite has been added. The obtained structure features a fine distribution of carbides to increase wear resistance and chromium fully dissolved in the matrix to provide corrosion resistance. X-ray diffraction (XRD) measurements and reflection position analysis with additional scanning electron microscopy (SEM) have been conducted to study the phase transition of NbFe 2 Laves phase into NbC carbides in two high Nb alloyed stainless tool steels. The results show that carburisation starts at 1000-1050uC and also confirm the correlation between oxide reduction and carburisation. The formed carbides are distinctly understoichiometric, which leads to an overestimation of the suitable quantitiy of added carbon in the thermodynamic calculations.

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Section: Introductionsupporting

confidence: 53%

Section: Introductionmentioning

confidence: 53%

Comprehensive investigation of phase transformation during diffusion alloying of Nb-rich powder metallurgical tool steels

et al. 2015

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Einfluss des Anlassens auf Eigenschaften einsatzgehärteter Bauteile

Dressel¹,

Grosch

2008

HTM Journal of Heat Treatment and Materials

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KurzfassungAn gehärteten und an angelassenen Proben aus den Einsatzstählen 16MnCr5 und 17CrNiMo6 wurden das Schwingfestigkeitsverhalten bei Umlaufbiegung, das Bruchverhalten im Biegeversuch mit langsamer und mit schlagartiger Laststeigerung und das Schleifverhalten untersucht. Anlassen verbessert erwartungsgemäß die Duktilität des einsatzgehärteten Randgefüges und die Zähigkeit des Verbunds aus hartem Randgefüge und weicherem Kerngefüge. Das Zeitfestigkeitsverhalten der angelassenen Gefüge ist bei beiden Werkstoffen gravierend schlechter als das Zeitfestigkeitsverhalten der gehärteten Gefüge. Anlassen verschlechtert ebenfalls die Dauerfestigkeitswerte gegenüber den gehärteten Gefüge, ausgenommen die P = 5%-Werte des Stahls 17CrNiMo6. Die Ergebnisse bestätigen den Kenntnisstand, dass bei gleichen Schleifbedingungen (und harten Gefügezuständen) angelassene Gefüge besser schleifbar sind als gehärtete Gefüge.

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Heat Treatment with Gaseous Atmospheres

Abstract: ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Cited by 2 publications

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Comprehensive investigation of phase transformation during diffusion alloying of Nb-rich powder metallurgical tool steels

Comprehensive investigation of phase transformation during diffusion alloying of Nb-rich powder metallurgical tool steels

Einfluss des Anlassens auf Eigenschaften einsatzgehärteter Bauteile

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