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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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&amp;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&amp;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&amp;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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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&amp;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&amp;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&amp;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.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Manufacturing Technology

ISSN

1213-2489

e-ISSN

—

Svazek periodika

19

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

5

Strana od-do

18-22

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85063346369