Examining the Impact of Intermediate Cooling on Mechanical Properties of 22MnB5 in a Tailored Tempering Process
Tailoring the properties of hot-stamped components offers the potential to enhance crash performance while simultaneously improving downstream joining processes. In recent years, an innovative technology suited for achieving tailored properties involving the utilization of a specialized furnace cham...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-12-01
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| Series: | Journal of Manufacturing and Materials Processing |
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| Online Access: | https://www.mdpi.com/2504-4494/8/1/5 |
| _version_ | 1797297800651735040 |
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| author | Alborz Reihani Sebastian Heibel Thomas Schweiker Marion Merklein |
| author_facet | Alborz Reihani Sebastian Heibel Thomas Schweiker Marion Merklein |
| author_sort | Alborz Reihani |
| collection | DOAJ |
| description | Tailoring the properties of hot-stamped components offers the potential to enhance crash performance while simultaneously improving downstream joining processes. In recent years, an innovative technology suited for achieving tailored properties involving the utilization of a specialized furnace chamber, known as the TemperBox<sup>®</sup>, has been introduced. Within this chamber, a cooled aluminum mask shields specific areas of the blank from incoming heat radiation and concurrently absorbs the blank’s own radiation. The duration of the heat radiation exchange can influence the diffusion-dependent phase transformation and, consequently, the resulting mechanical properties. Hence, the intermediate cooling duration assumes a pivotal role as a parameter, as is investigated in this study. To examine the effects, specimens of the steel 22MnB5 AS150 are subjected to intermediate cooling of varying durations, followed by forming and partial quenching. The temperature profile of the blank during intermediate cooling prior to forming and quenching is analyzed. Subsequently, the tailored hot-stamped components are assessed for hardness, strength, ductility, and thickness strain. The study reveals that with increasing duration of partial intermediate cooling and targeted radiation exchange, a homogeneous ferritic–pearlitic structure is formed from an austenitic structure. This uniform structure of ferrite and pearlite is reflected in lower hardness and strength values, along with improved ductility. Additionally, this paper introduces a simulation methodology designed to calculate the dynamics of thermal radiation and the kinetics of phase transformation. |
| first_indexed | 2024-03-07T22:26:38Z |
| format | Article |
| id | doaj.art-5d3ada43e3ff414ab57dec358fd617ac |
| institution | Directory Open Access Journal |
| issn | 2504-4494 |
| language | English |
| last_indexed | 2024-03-07T22:26:38Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Manufacturing and Materials Processing |
| spelling | doaj.art-5d3ada43e3ff414ab57dec358fd617ac2024-02-23T15:22:50ZengMDPI AGJournal of Manufacturing and Materials Processing2504-44942023-12-0181510.3390/jmmp8010005Examining the Impact of Intermediate Cooling on Mechanical Properties of 22MnB5 in a Tailored Tempering ProcessAlborz Reihani0Sebastian Heibel1Thomas Schweiker2Marion Merklein3Mercedes-Benz AG, Béla-Barényi-Straße 1, 71059 Sindelfingen, GermanyMercedes-Benz AG, Béla-Barényi-Straße 1, 71059 Sindelfingen, GermanyMercedes-Benz AG, Béla-Barényi-Straße 1, 71059 Sindelfingen, GermanyInstitute of Manufacturing Technology (LFT), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 13, 91058 Erlangen, GermanyTailoring the properties of hot-stamped components offers the potential to enhance crash performance while simultaneously improving downstream joining processes. In recent years, an innovative technology suited for achieving tailored properties involving the utilization of a specialized furnace chamber, known as the TemperBox<sup>®</sup>, has been introduced. Within this chamber, a cooled aluminum mask shields specific areas of the blank from incoming heat radiation and concurrently absorbs the blank’s own radiation. The duration of the heat radiation exchange can influence the diffusion-dependent phase transformation and, consequently, the resulting mechanical properties. Hence, the intermediate cooling duration assumes a pivotal role as a parameter, as is investigated in this study. To examine the effects, specimens of the steel 22MnB5 AS150 are subjected to intermediate cooling of varying durations, followed by forming and partial quenching. The temperature profile of the blank during intermediate cooling prior to forming and quenching is analyzed. Subsequently, the tailored hot-stamped components are assessed for hardness, strength, ductility, and thickness strain. The study reveals that with increasing duration of partial intermediate cooling and targeted radiation exchange, a homogeneous ferritic–pearlitic structure is formed from an austenitic structure. This uniform structure of ferrite and pearlite is reflected in lower hardness and strength values, along with improved ductility. Additionally, this paper introduces a simulation methodology designed to calculate the dynamics of thermal radiation and the kinetics of phase transformation.https://www.mdpi.com/2504-4494/8/1/5tailored temperinghot stampingheat exchangesimulationheat radiation dynamicsview factor |
| spellingShingle | Alborz Reihani Sebastian Heibel Thomas Schweiker Marion Merklein Examining the Impact of Intermediate Cooling on Mechanical Properties of 22MnB5 in a Tailored Tempering Process Journal of Manufacturing and Materials Processing tailored tempering hot stamping heat exchange simulation heat radiation dynamics view factor |
| title | Examining the Impact of Intermediate Cooling on Mechanical Properties of 22MnB5 in a Tailored Tempering Process |
| title_full | Examining the Impact of Intermediate Cooling on Mechanical Properties of 22MnB5 in a Tailored Tempering Process |
| title_fullStr | Examining the Impact of Intermediate Cooling on Mechanical Properties of 22MnB5 in a Tailored Tempering Process |
| title_full_unstemmed | Examining the Impact of Intermediate Cooling on Mechanical Properties of 22MnB5 in a Tailored Tempering Process |
| title_short | Examining the Impact of Intermediate Cooling on Mechanical Properties of 22MnB5 in a Tailored Tempering Process |
| title_sort | examining the impact of intermediate cooling on mechanical properties of 22mnb5 in a tailored tempering process |
| topic | tailored tempering hot stamping heat exchange simulation heat radiation dynamics view factor |
| url | https://www.mdpi.com/2504-4494/8/1/5 |
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