Impact of various heat treatment processes and welding speeds on the mechanical properties and microstructures of soft/hard composite joints
There is a certain contradiction between the formability and strength of auto parts. In this work, the whole-process processing technology of hot stamping soft steel was designed, and 500 MPa grade mild steel (500HS) with uniform microstructure was prepared. To take into account the strength and for...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2024-02-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2024.1358912/full |
| _version_ | 1827344813454786560 |
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| author | Yang Yu Zhao Wang Biao Chen Shuchao Zhang Jinliang Du |
| author_facet | Yang Yu Zhao Wang Biao Chen Shuchao Zhang Jinliang Du |
| author_sort | Yang Yu |
| collection | DOAJ |
| description | There is a certain contradiction between the formability and strength of auto parts. In this work, the whole-process processing technology of hot stamping soft steel was designed, and 500 MPa grade mild steel (500HS) with uniform microstructure was prepared. To take into account the strength and formability of hot stamping soft steel, here, based on laser welding technology, 500 MPa grade soft steel, and 1500 MPa grade hard steel are benignly composited, and by adjusting the laser welding speed and heat treatment process, the loss of mechanical properties caused by the weld seam is eliminated. A soft/hard composite steel for automobiles with excellent strength, ductility and formability is obtained. To maintain excellent deformation resistance and bonding force of the weld, the heat-affected zone of 500HS retains part of bainite and pearlite, which is beneficial to the strain compatibility and stress partitioning with the microstructure of the base metal, and the hardness is low. After heat treatment, which helps to transfer the stress concentration effect to the 500HS base metal with strong energy absorption capacity, so that the clad steel has excellent comprehensive mechanical properties. This process is developed based on existing industrialized equipment and has broad application prospects. |
| first_indexed | 2024-03-07T22:54:59Z |
| format | Article |
| id | doaj.art-16bfa81ad1574b7092879bef7da2b55f |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-03-07T22:54:59Z |
| publishDate | 2024-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-16bfa81ad1574b7092879bef7da2b55f2024-02-23T04:50:02ZengFrontiers Media S.A.Frontiers in Materials2296-80162024-02-011110.3389/fmats.2024.13589121358912Impact of various heat treatment processes and welding speeds on the mechanical properties and microstructures of soft/hard composite jointsYang Yu0Zhao Wang1Biao Chen2Shuchao Zhang3Jinliang Du4Shougang Group, Shougang Jingtang United Iron and Steel Co., Ltd., Tangshan, ChinaTangshan Iron and Steel Group Co., Ltd., Tangshan, ChinaShougang Group, Shougang Jingtang United Iron and Steel Co., Ltd., Tangshan, ChinaSchool of Microelectronics, Jiangsu Vocational College of Information Technology, Wuxi, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan, ChinaThere is a certain contradiction between the formability and strength of auto parts. In this work, the whole-process processing technology of hot stamping soft steel was designed, and 500 MPa grade mild steel (500HS) with uniform microstructure was prepared. To take into account the strength and formability of hot stamping soft steel, here, based on laser welding technology, 500 MPa grade soft steel, and 1500 MPa grade hard steel are benignly composited, and by adjusting the laser welding speed and heat treatment process, the loss of mechanical properties caused by the weld seam is eliminated. A soft/hard composite steel for automobiles with excellent strength, ductility and formability is obtained. To maintain excellent deformation resistance and bonding force of the weld, the heat-affected zone of 500HS retains part of bainite and pearlite, which is beneficial to the strain compatibility and stress partitioning with the microstructure of the base metal, and the hardness is low. After heat treatment, which helps to transfer the stress concentration effect to the 500HS base metal with strong energy absorption capacity, so that the clad steel has excellent comprehensive mechanical properties. This process is developed based on existing industrialized equipment and has broad application prospects.https://www.frontiersin.org/articles/10.3389/fmats.2024.1358912/fullhot stamping steelfull process designautomotive steellaser weldingmechanical property |
| spellingShingle | Yang Yu Zhao Wang Biao Chen Shuchao Zhang Jinliang Du Impact of various heat treatment processes and welding speeds on the mechanical properties and microstructures of soft/hard composite joints Frontiers in Materials hot stamping steel full process design automotive steel laser welding mechanical property |
| title | Impact of various heat treatment processes and welding speeds on the mechanical properties and microstructures of soft/hard composite joints |
| title_full | Impact of various heat treatment processes and welding speeds on the mechanical properties and microstructures of soft/hard composite joints |
| title_fullStr | Impact of various heat treatment processes and welding speeds on the mechanical properties and microstructures of soft/hard composite joints |
| title_full_unstemmed | Impact of various heat treatment processes and welding speeds on the mechanical properties and microstructures of soft/hard composite joints |
| title_short | Impact of various heat treatment processes and welding speeds on the mechanical properties and microstructures of soft/hard composite joints |
| title_sort | impact of various heat treatment processes and welding speeds on the mechanical properties and microstructures of soft hard composite joints |
| topic | hot stamping steel full process design automotive steel laser welding mechanical property |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2024.1358912/full |
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