INDUCTION QUENCHING OF 100CrMnSi6-4 BEARING STEEL AFTER ACCELERATED CARBIDE SPHEROIDISATION AND LONG-DURATION ANNEALING

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F15%3AN0000004" target="_blank" >RIV/26316919:_____/15:N0000004 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.metal2016.com/files/proceedings/21/papers/4043.pdf" target="_blank" >http://www.metal2016.com/files/proceedings/21/papers/4043.pdf</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

INDUCTION QUENCHING OF 100CrMnSi6-4 BEARING STEEL AFTER ACCELERATED CARBIDE SPHEROIDISATION AND LONG-DURATION ANNEALING

Popis výsledku v původním jazyce

Soft annealing is an important and time demanding part of bearing steel treatment process. The experimental program of accelerated carbide spheroidisation deals with significant shortening of the time necessary for producing steel microstructure consisting of ferritic matrix and globular carbides. Globular carbide particles and the grain size of the matrix are significantly smaller after accelerated carbide spheroidisation process in comparison with conventional long-duration soft annealing. This fact ensures finer martensitic structure after hardening and this shows that the microstructure and properties of final hardened product are dependent on previous spheroidisation annealing. Finer carbides in structure enhance hardness and facilitate carbide dissolution during austenitisation. This effect enables quenching temperature lowering. It reduces the energy demand of the quenching process and mitigates the risk of residual stresses and distortion. The main objective of the present research was to identify the effect of the initial size of carbides and prior austenite grains upon the final microstructure and hardness of induction-quenched 100CrMnSi6-4 bearing steel. Microstructure evolution and hardness were monitored during austenitisation, quenching and subsequent tempering. Microstructure and properties after accelerated treatment were compared with those after conventional longduration treatment.

Název v anglickém jazyce

INDUCTION QUENCHING OF 100CrMnSi6-4 BEARING STEEL AFTER ACCELERATED CARBIDE SPHEROIDISATION AND LONG-DURATION ANNEALING

Popis výsledku anglicky

Soft annealing is an important and time demanding part of bearing steel treatment process. The experimental program of accelerated carbide spheroidisation deals with significant shortening of the time necessary for producing steel microstructure consisting of ferritic matrix and globular carbides. Globular carbide particles and the grain size of the matrix are significantly smaller after accelerated carbide spheroidisation process in comparison with conventional long-duration soft annealing. This fact ensures finer martensitic structure after hardening and this shows that the microstructure and properties of final hardened product are dependent on previous spheroidisation annealing. Finer carbides in structure enhance hardness and facilitate carbide dissolution during austenitisation. This effect enables quenching temperature lowering. It reduces the energy demand of the quenching process and mitigates the risk of residual stresses and distortion. The main objective of the present research was to identify the effect of the initial size of carbides and prior austenite grains upon the final microstructure and hardness of induction-quenched 100CrMnSi6-4 bearing steel. Microstructure evolution and hardness were monitored during austenitisation, quenching and subsequent tempering. Microstructure and properties after accelerated treatment were compared with those after conventional longduration treatment.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

—

Projekt

<a href="/cs/project/LO1412" target="_blank" >LO1412: Rozvoj Západočeského materiálově metalurgického Centra</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

METAL 2015: 24TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS

ISBN

978-80-87294-62-8

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

493-498

Název nakladatele

TANGER LTD.

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

3. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—