Grain refinement in hypereutectoid steel by semi-solid processing followed by mechanical working

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F20%3A43961608" target="_blank" >RIV/49777513:23210/20:43961608 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/26316919:_____/20:N0000044

Výsledek na webu

<a href="https://www.confer.cz/metal/2020" target="_blank" >https://www.confer.cz/metal/2020</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.37904/metal.2020.3473" target="_blank" >10.37904/metal.2020.3473</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Grain refinement in hypereutectoid steel by semi-solid processing followed by mechanical working

Popis výsledku v původním jazyce

Research into new forming methods has yielded new techniques of altering the microstructure in hypereutectoid steels. An innovative approach to processing can lead to improved mechanical properties thanks to elimination of problematic and undesirable sharp-edged carbides which are very difficult to dissolve. This paper explores an unconventional method of refining the grain in and removing primary sharp-edged chromium carbides from X210Cr12 hypereutectoid tool steel. The process route applied to input stock comprised semi-solid processing followed by forming below the solidus temperature. The goal of the study was to determine the impact of the applied strain on microstructural evolution and grain refinement. In these experiments, the material was heated to above the solidus temperature and then either cooled without any other intervention or cooled to a forming temperature and then formed using five to ten deformation steps. Higher number of deformation steps led to much finer microstructure and higher hardness which increased from the initial 673 HV10 to 873 HV10. This procedure produced a very fine microstructure with grains of approximately 1 µm and a fine dispersion of chromium carbides. Since the resulting material was very hard and brittle, it had to be tempered. Tempering was performed once at 300 °C for 1 hour or twice at 530 °C, for 1 hour in each operation.

Název v anglickém jazyce

Grain refinement in hypereutectoid steel by semi-solid processing followed by mechanical working

Popis výsledku anglicky

Research into new forming methods has yielded new techniques of altering the microstructure in hypereutectoid steels. An innovative approach to processing can lead to improved mechanical properties thanks to elimination of problematic and undesirable sharp-edged carbides which are very difficult to dissolve. This paper explores an unconventional method of refining the grain in and removing primary sharp-edged chromium carbides from X210Cr12 hypereutectoid tool steel. The process route applied to input stock comprised semi-solid processing followed by forming below the solidus temperature. The goal of the study was to determine the impact of the applied strain on microstructural evolution and grain refinement. In these experiments, the material was heated to above the solidus temperature and then either cooled without any other intervention or cooled to a forming temperature and then formed using five to ten deformation steps. Higher number of deformation steps led to much finer microstructure and higher hardness which increased from the initial 673 HV10 to 873 HV10. This procedure produced a very fine microstructure with grains of approximately 1 µm and a fine dispersion of chromium carbides. Since the resulting material was very hard and brittle, it had to be tempered. Tempering was performed once at 300 °C for 1 hour or twice at 530 °C, for 1 hour in each operation.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/TJ02000182" target="_blank" >TJ02000182: Zvýšení odolnosti vůči opotřebení u nástrojových ocelí kombinací semi-solid zpracování s následným tvářením za tepla a kryogenního zpracování</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2020-29th International Conference on Metallurgy and Materials, Conference Proceedings

ISBN

978-80-87294-97-0

ISSN

2694-9296

e-ISSN

—

Počet stran výsledku

6

Strana od-do

228-233

Název nakladatele

Tanger Ltd.

Místo vydání

Ostrava

Místo konání akce

Brno, Česko

Datum konání akce

20. 5. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—