Effects of Cooling Rate in an Innovative Heat Treatment Route for High-Strength Steels

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F18%3A43950907" target="_blank" >RIV/49777513:23210/18:43950907 - isvavai.cz</a>

Result on the web

<a href="http://arl.ujep.cz/arl-ujep/en/csg/?repo=ujeprepo&key=77039484032" target="_blank" >http://arl.ujep.cz/arl-ujep/en/csg/?repo=ujeprepo&key=77039484032</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.21062/ujep/46.2018/a/1213-2489/MT/18/1/16" target="_blank" >10.21062/ujep/46.2018/a/1213-2489/MT/18/1/16</a>

Result language

angličtina

Original language name

Effects of Cooling Rate in an Innovative Heat Treatment Route for High-Strength Steels

Original language description

The requirement for high strength and ductility is usually associated with martensitic microstructure with a certain amount of retained austenite. One of the innovative heat treatment processes that can lead to such micro-structure is the Q&amp;P process (Quenching and Partitioning). It can produce microstructures consisting of mar-tensite and a certain amount of retained austenite, which exhibit strengths above 2000 MPa and elongation levels of more than 10%. The objective of this research was to explore the effects of the cooling rate in the Q&amp;P process and evaluate the effects of various microstructure constituents on mechanical properties of high-strength steels. Three newly-created experimental steels, which contained 0.43% carbon and had reduced Ms temperatures thanks to manganese addition, were subjected to several heat treatment routes which involved various cooling rates. The cooling rates were chosen on the basis of calculations using the JMatPro software and earlier results. It was found that by varying the cooling rate one can obtain various mixed microstructures and a wide range of mechanical properties. The strengths were in the range of 1200-2300 MPa and A5mm elongation levels were up to 18%. Because the amount of retained austenite has a considerable impact on the resulting mechanical properties, it was measured by means of X-ray diffraction.

Czech name

—

Czech description

—

Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

—

OECD FORD branch

20301 - Mechanical engineering

Project

<a href="/en/project/LO1502" target="_blank" >LO1502: Development of Regional Technological Institute</a><br>

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

Manufacturing Technology

ISSN

1213-2489

e-ISSN

—

Volume of the periodical

18

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

6

Pages from-to

16-21

UT code for WoS article

—

EID of the result in the Scopus database

2-s2.0-85049584081