Determination of transformation temperatures in advanced high-strength steels and their use in designing of Q&P process routes

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F19%3A43953761" target="_blank" >RIV/49777513:23210/19:43953761 - isvavai.cz</a>
Result on the web
<a href="https://arl.ujep.cz/arl-ujep/cs/csg/?repo=ujeprepo&key=86620693158" target="_blank" >https://arl.ujep.cz/arl-ujep/cs/csg/?repo=ujeprepo&key=86620693158</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.21062/ujep/238.2019/a/1213-2489/mt/19/1/18" target="_blank" >10.21062/ujep/238.2019/a/1213-2489/mt/19/1/18</a>

Result language
angličtina
Original language name
Determination of transformation temperatures in advanced high-strength steels and their use in designing of Q&P process routes
Original language description
Determining transformation temperatures in novel steels is an important step in designing their heat treatment routes. When it comes to advanced high-strength steels intended for the Q&P process (quenching and partitioning), the key parameters for designing their processing routes include the temperatures of the start and end of austenitization and the Ms temperature. Q&P processing is characterized by quenching the steel from a fully-austenitic condition to a temperature below the Ms and by subsequent holding at the partitioning temperature. This leads to martensitic microstructures with some retained austenite and to ultimate strengths above 2000 MPa and elongation levels up to 10 %. Several AHS steels containing 0.4% C were made and cast for this investigation, whose main alloying additions were manganese, silicon, chromium, molybdenum and nickel. Their transformation temperatures were calculated by using the JMatPro software. These values were validated by dilatometry measurements. Based on these results, a Q&P process route was designed and put to test. The resulting microstructures were documented using optical and scanning electron microscopy. Strengths of more than 2300 MPa combined with up to 11% elongation levels were obtained.
Czech name
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Czech description
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Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
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OECD FORD branch
20501 - Materials engineering

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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