The Effect of Two-Step Heat Treatment Parameters on Microstructure and Mechanical Properties of 42SiMn Steel

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F17%3A43933138" target="_blank" >RIV/49777513:23210/17:43933138 - isvavai.cz</a>

Result on the web

<a href="http://www.mdpi.com/2075-4701/7/12/537/htm" target="_blank" >http://www.mdpi.com/2075-4701/7/12/537/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met7120537" target="_blank" >10.3390/met7120537</a>

Result language

angličtina

Original language name

The Effect of Two-Step Heat Treatment Parameters on Microstructure and Mechanical Properties of 42SiMn Steel

Original language description

Medium-carbon steel 42SiMn (0.4C-0.6Mn-2Si-0.03Nb) was used for a two-step heat treatment consisting of a soaking hold and an annealing hold at bainite transformation temperature. Various heating temperatures, cooling rates, and bainitic hold temperatures were applied to the steel to obtain microstructures typical for TRIP (Transformation Induced Plasticity) steels. TRIP steels utilize the positive effects of a multiphase microstructure with retained austenite, creating a good combination of strength and total elongation and an excellent deep-drawing ability. Typical microstructures consist of ferrite, bainite, and 10–15% of retained austenite. In this work, tensile strengths in the region of 887–1063 MPa were achieved with total elongation A5mm of 26–47%, and the final microstructures contained 4–16% of retained austenite. The most suitable microstructure and the best combination of high strength and total elongation were achieved for the processing with intercritical heating temperature of 850 ◦C and cooling at 30 ◦C/s to the bainitic hold of 400 ◦C. Very fine pearlite persisted in the microstructures, even after applying a cooling rate of 50 ◦C/s, however these small areas with extremely fine laths did not prevent the retention of up to 16% of retained austenite, and high total elongation A5mm above 40% was still reached for these microstructures.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials 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

2017

Confidentiality

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

Name of the periodical

Metals

ISSN

2075-4701

e-ISSN

—

Volume of the periodical

7

Issue of the periodical within the volume

12

Country of publishing house

CH - SWITZERLAND

Number of pages

14

Pages from-to

1-14

UT code for WoS article

000419184500022

EID of the result in the Scopus database

2-s2.0-85037741221