The effect of subzero treatment on microstructure, fracture toughness, and wear resistance of Vanadis 6 tool steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F16%3A00457514" target="_blank" >RIV/68081723:_____/16:00457514 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/16:00236755 RIV/00216305:26210/15:PU140258

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.msea.2015.11.078" target="_blank" >http://dx.doi.org/10.1016/j.msea.2015.11.078</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2015.11.078" target="_blank" >10.1016/j.msea.2015.11.078</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of subzero treatment on microstructure, fracture toughness, and wear resistance of Vanadis 6 tool steel

Popis výsledku v původním jazyce

Vanadis 6 ledeburitic steel manufactured by powder metallurgy of rapidly solidi fied particles was con-ventionally quenched and subzero-treated at temperatures of -90 and -196 °C for 4 and 10 h, re-spectively, followed by standard double-tempering to a secondary hardening peak at 530 °C for 2 h. Besides quantification of standard microstructural features by using examination by scanning electron microscopy and X-ray diffraction analysis, the fracture toughness, hardness and nanohardness, flexural strength, fracture toughness, and wear resistance have been characterized. The obtained results indicate the following: (i) The microstructure of the material consists of tempered martensite and eutectic, secondary, and small globular carbides. Retained austenite is completely eliminated by application of the given heat-treatment schedules. (ii) The amount of small globular carbides is significantly increased by subzero treatments; the lower the temperature (or the longer the duration) of subzero treatment, the higher the content of these carbides. (iii) The hardness of the material is in fluenced slightly negatively by subzero treatments followed by tempering in the normal secondary hardening temperature range. (iv) There is no negative impact of the given treatment schedules on either toughness or fracture toughness of the steel. (v) When a hardened ball bearing is used as a counterpart, wear resistance is improved by subzero treatments despite the slightly lower hardness of the examined tool steel.

Název v anglickém jazyce

The effect of subzero treatment on microstructure, fracture toughness, and wear resistance of Vanadis 6 tool steel

Popis výsledku anglicky

Vanadis 6 ledeburitic steel manufactured by powder metallurgy of rapidly solidi fied particles was con-ventionally quenched and subzero-treated at temperatures of -90 and -196 °C for 4 and 10 h, re-spectively, followed by standard double-tempering to a secondary hardening peak at 530 °C for 2 h. Besides quantification of standard microstructural features by using examination by scanning electron microscopy and X-ray diffraction analysis, the fracture toughness, hardness and nanohardness, flexural strength, fracture toughness, and wear resistance have been characterized. The obtained results indicate the following: (i) The microstructure of the material consists of tempered martensite and eutectic, secondary, and small globular carbides. Retained austenite is completely eliminated by application of the given heat-treatment schedules. (ii) The amount of small globular carbides is significantly increased by subzero treatments; the lower the temperature (or the longer the duration) of subzero treatment, the higher the content of these carbides. (iii) The hardness of the material is in fluenced slightly negatively by subzero treatments followed by tempering in the normal secondary hardening temperature range. (iv) There is no negative impact of the given treatment schedules on either toughness or fracture toughness of the steel. (v) When a hardened ball bearing is used as a counterpart, wear resistance is improved by subzero treatments despite the slightly lower hardness of the examined tool steel.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Materials Science and Engineering A-Structural materials

ISSN

0921-5093

e-ISSN

—

Svazek periodika

652

Číslo periodika v rámci svazku

JAN

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

192-204

Kód UT WoS článku

000369556500021

EID výsledku v databázi Scopus

2-s2.0-84949058019