Study of Transition Areas in Press-Hardened Steels in a Combined Tool for Hot and Cold Forming
Press-hardening, also known as hot stamping, is a manufacturing process for producing car body parts that must meet the high demands of their mechanical properties and safety parameters. Moreover, these components often require different mechanical properties in different parts of the component. Thi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/1/442 |
| _version_ | 1797625320380039168 |
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| author | Filip Votava Hana Jirková Ludmila Kučerová Štěpán Jeníček |
| author_facet | Filip Votava Hana Jirková Ludmila Kučerová Štěpán Jeníček |
| author_sort | Filip Votava |
| collection | DOAJ |
| description | Press-hardening, also known as hot stamping, is a manufacturing process for producing car body parts that must meet the high demands of their mechanical properties and safety parameters. Moreover, these components often require different mechanical properties in different parts of the component. This work presents the press-hardening process in a special combined tool where one half of the tool is heated and the other half is cooled. The cooled part has been 3D printed due to the complexity of the internal cooling channels. The aim of this work is to investigate the variation of the microstructures in the sheet metal and the mechanical properties in relation to the cooling process in the tool and to determine the transition area where these properties cross over. Two steels were chosen for the experiment. The most commonly used steel 22MnB5, and an experimental high-strength steel with 0.2% C alloyed with manganese and aluminium. A temperature of 425 °C was set in the heated part of the tool, and different holding times in the tool were tested. In the heated part of the tool, a bainitic structure with a fraction of ferrite and retained austenite was formed, while in the quenched part of the tool, a martensitic transformation was promoted due to rapid cooling. In addition to microscopic analyses, mechanical tests and hardness measurements were also performed. |
| first_indexed | 2024-03-11T09:54:54Z |
| format | Article |
| id | doaj.art-5087296d998941c9b09a1bddcbc3b7e9 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T09:54:54Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-5087296d998941c9b09a1bddcbc3b7e92023-11-16T15:51:44ZengMDPI AGMaterials1996-19442023-01-0116144210.3390/ma16010442Study of Transition Areas in Press-Hardened Steels in a Combined Tool for Hot and Cold FormingFilip Votava0Hana Jirková1Ludmila Kučerová2Štěpán Jeníček3Regional Technological Institute, University of West Bohemia, Univerzitní 8, 301 00 Pilsen, Czech RepublicRegional Technological Institute, University of West Bohemia, Univerzitní 8, 301 00 Pilsen, Czech RepublicRegional Technological Institute, University of West Bohemia, Univerzitní 8, 301 00 Pilsen, Czech RepublicRegional Technological Institute, University of West Bohemia, Univerzitní 8, 301 00 Pilsen, Czech RepublicPress-hardening, also known as hot stamping, is a manufacturing process for producing car body parts that must meet the high demands of their mechanical properties and safety parameters. Moreover, these components often require different mechanical properties in different parts of the component. This work presents the press-hardening process in a special combined tool where one half of the tool is heated and the other half is cooled. The cooled part has been 3D printed due to the complexity of the internal cooling channels. The aim of this work is to investigate the variation of the microstructures in the sheet metal and the mechanical properties in relation to the cooling process in the tool and to determine the transition area where these properties cross over. Two steels were chosen for the experiment. The most commonly used steel 22MnB5, and an experimental high-strength steel with 0.2% C alloyed with manganese and aluminium. A temperature of 425 °C was set in the heated part of the tool, and different holding times in the tool were tested. In the heated part of the tool, a bainitic structure with a fraction of ferrite and retained austenite was formed, while in the quenched part of the tool, a martensitic transformation was promoted due to rapid cooling. In addition to microscopic analyses, mechanical tests and hardness measurements were also performed.https://www.mdpi.com/1996-1944/16/1/442press-hardeninghot stampinghigh-strength steelmultiphase structure |
| spellingShingle | Filip Votava Hana Jirková Ludmila Kučerová Štěpán Jeníček Study of Transition Areas in Press-Hardened Steels in a Combined Tool for Hot and Cold Forming Materials press-hardening hot stamping high-strength steel multiphase structure |
| title | Study of Transition Areas in Press-Hardened Steels in a Combined Tool for Hot and Cold Forming |
| title_full | Study of Transition Areas in Press-Hardened Steels in a Combined Tool for Hot and Cold Forming |
| title_fullStr | Study of Transition Areas in Press-Hardened Steels in a Combined Tool for Hot and Cold Forming |
| title_full_unstemmed | Study of Transition Areas in Press-Hardened Steels in a Combined Tool for Hot and Cold Forming |
| title_short | Study of Transition Areas in Press-Hardened Steels in a Combined Tool for Hot and Cold Forming |
| title_sort | study of transition areas in press hardened steels in a combined tool for hot and cold forming |
| topic | press-hardening hot stamping high-strength steel multiphase structure |
| url | https://www.mdpi.com/1996-1944/16/1/442 |
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