USE OF MULTI-PHASE TRIP STEEL FOR PRESS-HARDENING TECHNOLOGY
| Autor: | Kateřina Opatová, Ludmila Kučerová, Štěpán Jeníček, Hana Jirková, Jiří Vrtáček, Petr Kurka |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Austenite
lcsh:TN1-997 Materials science Multi phase business.industry TRIP steels heat treatments Metals and Alloys TRIP steel Automotive industry Mechanical engineering press-hardening Isothermal process Ultimate tensile strength Hardening (metallurgy) Fuel efficiency high strength steels business lcsh:Mining engineering. Metallurgy |
| Zdroj: | Acta Metallurgica Slovaca, Vol 25, Iss 2 (2019) |
| ISSN: | 1338-1156 1335-1532 |
| Popis: | Development of high strength or even ultra-high strength steels is mainly driven by the automotive industry which strives to reduce the weight of individual parts, fuel consumption, and CO2 emissions. Another important factor is to improve passenger safety. In order to achieve the required mechanical properties, it is necessary to use suitable heat treatment in addition to an appropriate alloying strategy. The main problem of these types of treatments is the isothermal holding step. For TRIP steels, the holding temperature lies in the field of bainitic transformation. These isothermal holds are economically demanding to perform in industrial conditions. Therefore new treatments without isothermal holds, which are possible to integrate directly into the production process, are searched. One way to produce high-strength sheet is the press-hardening technology. Physical simulation based on data from a real-world press-hardening process was tested on CMnSi TRIP steel. Mixed martensitic-bainitic structures with ferrite and retained austenite (RA) were obtained, having tensile strengths in excess of 1000 MPa. |
| Databáze: | OpenAIRE |
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