Microstructure and hardness of sub-zero treated and no tempered P/M Vanadis 6 ledeburitic tool steel

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F15%3A00226093" target="_blank" >RIV/68407700:21220/15:00226093 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.vacuum.2014.10.004" target="_blank" >http://dx.doi.org/10.1016/j.vacuum.2014.10.004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.vacuum.2014.10.004" target="_blank" >10.1016/j.vacuum.2014.10.004</a>

Result language

angličtina

Original language name

Microstructure and hardness of sub-zero treated and no tempered P/M Vanadis 6 ledeburitic tool steel

Original language description

Microstructure, phase constitution and hardness of Cr–V ledeburitic steel Vanadis 6 subjected to sub-zero treatment with a soaking time of 4 h and at a temperature of -196 °C have been examined with reference to the same material after conventional heat treatment. Microstructures have been characterized using light microscopy, scanning electron microscopy, transmission electron microscopy and X-ray diffraction. Hardness has been evaluated by Vickers method. As-annealed material consists of the ferritic matrix and of two carbide phases, namely M7C3 and MC. After the heat treatment, the matrix is martensitic with certain amount of retained austenite. Sub-zero treatment results in more complete martensitic transformation. The martensite contains areas with extremely enhanced carbon content. Sub-zero treatment refines the size of martensitic domains and increases the dislocation density inside the domains. Microstructure of sub-zero treated steel contains enhanced amount of small globular carbides, as compared to conventionally heat treated material. These particles have a size of around 100 nm in most cases. Small globular carbides are of the cementitic nature for both the no sub-zero treated steels and the sub-zero treated material. Bulk hardness manifests a moderate increase due to the sub-zero treatment. The increase in hardness is more significant when higher austenitizing temperature is used for the treatment, which is associated with more pronounced reduction of the retained austenite content.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JG - Metallurgy, metal materials

OECD FORD branch

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Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2015

Confidentiality

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

Name of the periodical

Vacuum

ISSN

0042-207X

e-ISSN

—

Volume of the periodical

111

Issue of the periodical within the volume

JAN

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

92-101

UT code for WoS article

000347510300015

EID of the result in the Scopus database

2-s2.0-84908428386