Influence of chromium and niobium on the press-hardening process of multiphase low-alloy TRIP steels
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F21%3A43959741" target="_blank" >RIV/49777513:23210/21:43959741 - isvavai.cz</a>
Result on the web
<a href="https://www.scientific.net/MSF.1016.636" target="_blank" >https://www.scientific.net/MSF.1016.636</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.4028/www.scientific.net/MSF.1016.636" target="_blank" >10.4028/www.scientific.net/MSF.1016.636</a>
Alternative languages
Result language
angličtina
Original language name
Influence of chromium and niobium on the press-hardening process of multiphase low-alloy TRIP steels
Original language description
Press-hardening is an intensively developing forming technology which is mainly used for the production of car body parts. Because it is a hot forming technology, small forming forces can be utilized and, due to the lower spring-back effect, more accurate products are achieved. In car bodies, materials with high energy absorption and a sufficient hardening coefficient are mainly used in impacted parts. One of these materials is TRIP multiphase steels with different chemical composition. In these steels, it is possible to achieve an ultimate strength up to 1000 MPa with the ductility of 20-30%. In order to achieve the desired properties, it is necessary to select a suitable heat treatment that allows to achieve a multiphase structure. Phase transformations and mechanical properties are influenced by the use of suitable alloying elements. Three low-alloy, multiphase TRIP steels with different chemical compositions with a carbon content of 0.2% were chosen for the experimental program. The first steel was alloyed only with manganese and silicon, in the second niobium was added, and in the third the influence of chromium on increase of hardenability and strength was investigated. Press-hardening was performed in a heated forming tool. To describe the effect of the cooling rate, the forming was carried out in a tool at room temperature and after preheating to 425°C. The influence of holding time in the tool at 425°C to support the formation of bainite and retained austenite stabilization was also investigated. Mixed ferritic-bainitic-martensitic structures with some retained austenite content were obtained.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
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)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Materials Science Forum
ISBN
978-3-0357-3630-4
ISSN
0255-5476
e-ISSN
1662-9752
Number of pages
6
Pages from-to
636-641
Publisher name
Trans Tech Publication Ltd.
Place of publication
Baech
Event location
virtuální konference
Event date
May 9, 2021
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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