Research on Welding Heat Input and Mechanical Property Optimization of S31603/Q500qENH Composite Steel Joints.
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| Title: | Research on Welding Heat Input and Mechanical Property Optimization of S31603/Q500qENH Composite Steel Joints. |
|---|---|
| Authors: | Feng, F.1,2 (AUTHOR), Fu, Y. Q.2 (AUTHOR) 191607093@qq.com, Ju, J. S.3 (AUTHOR) |
| Source: | Strength of Materials. Jan2026, Vol. 58 Issue 1, p135-150. 16p. |
| Subjects: | Microstructure, Cooling curves, Mechanical behavior of materials, Austenitic stainless steel, Steel, Phase diagrams |
| Abstract: | The present study investigates the microstructure and mechanical properties of butt joints in a (3+16) mm thick S31603/Q500qENH composite steel plate under both flat and vertical welding conditions. The phase diagram method was utilized to derive the continuous cooling transformation (CCT) curves for Q500qENH steel and welding materials. The energy-cooling time relationship, as derived from the Rykalin 2D model of heat conduction, was utilized to propose the optimal heat input range for welding the base metal and transition layer of the S31603/Q500qENH composite steel plate. The findings suggest that decreasing the velocity of welding in the vertical direction results in elevated levels of heat input, consequently leading to diminished overall mechanical performance of the joint when compared to flat welding. During the welding of the transition layer in the composite steel plate, excessively high heat input increases the migration of C, Cr, and Ni between the transition-layer weld and the Q500qENH steel weld, leading to the formation of unfavorable phases, such as Cr23C6 carbides and the brittle σ phase. Conversely, insufficient heat input has been shown to result in a substantial increase in the cooling rate, thereby increasing the probability of martensite formation. In order to circumvent the formation of brittle phases and enhance the toughness of welded joints, this study integrates welding experiments, CCT curves, and an energy-cooling time relationship model to propose an optimal range of welding heat inputs for S31603/Q500qENH composite steel plates. The findings provide essential theoretical guidance and practical recommendations for the optimization of welding processes for composite steel plates. [ABSTRACT FROM AUTHOR] |
| Copyright of Strength of Materials is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 193310189 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Research on Welding Heat Input and Mechanical Property Optimization of S31603/Q500qENH Composite Steel Joints. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Feng%2C+F%2E%22">Feng, F.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fu%2C+Y%2E+Q%2E%22">Fu, Y. Q.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> 191607093@qq.com</i><br /><searchLink fieldCode="AR" term="%22Ju%2C+J%2E+S%2E%22">Ju, J. S.</searchLink><relatesTo>3</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Strength+of+Materials%22">Strength of Materials</searchLink>. Jan2026, Vol. 58 Issue 1, p135-150. 16p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Cooling+curves%22">Cooling curves</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Austenitic+stainless+steel%22">Austenitic stainless steel</searchLink><br /><searchLink fieldCode="DE" term="%22Steel%22">Steel</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+diagrams%22">Phase diagrams</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The present study investigates the microstructure and mechanical properties of butt joints in a (3+16) mm thick S31603/Q500qENH composite steel plate under both flat and vertical welding conditions. The phase diagram method was utilized to derive the continuous cooling transformation (CCT) curves for Q500qENH steel and welding materials. The energy-cooling time relationship, as derived from the Rykalin 2D model of heat conduction, was utilized to propose the optimal heat input range for welding the base metal and transition layer of the S31603/Q500qENH composite steel plate. The findings suggest that decreasing the velocity of welding in the vertical direction results in elevated levels of heat input, consequently leading to diminished overall mechanical performance of the joint when compared to flat welding. During the welding of the transition layer in the composite steel plate, excessively high heat input increases the migration of C, Cr, and Ni between the transition-layer weld and the Q500qENH steel weld, leading to the formation of unfavorable phases, such as Cr23C6 carbides and the brittle σ phase. Conversely, insufficient heat input has been shown to result in a substantial increase in the cooling rate, thereby increasing the probability of martensite formation. In order to circumvent the formation of brittle phases and enhance the toughness of welded joints, this study integrates welding experiments, CCT curves, and an energy-cooling time relationship model to propose an optimal range of welding heat inputs for S31603/Q500qENH composite steel plates. The findings provide essential theoretical guidance and practical recommendations for the optimization of welding processes for composite steel plates. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Strength of Materials is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s11223-026-00877-7 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 16 StartPage: 135 Subjects: – SubjectFull: Microstructure Type: general – SubjectFull: Cooling curves Type: general – SubjectFull: Mechanical behavior of materials Type: general – SubjectFull: Austenitic stainless steel Type: general – SubjectFull: Steel Type: general – SubjectFull: Phase diagrams Type: general Titles: – TitleFull: Research on Welding Heat Input and Mechanical Property Optimization of S31603/Q500qENH Composite Steel Joints. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Feng, F. – PersonEntity: Name: NameFull: Fu, Y. Q. – PersonEntity: Name: NameFull: Ju, J. S. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00392316 Numbering: – Type: volume Value: 58 – Type: issue Value: 1 Titles: – TitleFull: Strength of Materials Type: main |
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