Microstructure and Properties of Corrosion-Resistant Steel Produced by CASTRIP
The CASTRIP process is an innovative method for producing flat rolled low-carbon and low-alloy steel at very thin thicknesses. By casting steel close to its final dimensions, enormous savings in time and energy can be realized. In this paper, an ultra-high-strength low-alloy corrosion-resistant stee...
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MDPI AG
2025-06-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/15/7/595 |
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| author | Kai Lei Long Chen Hengchang Lu Xintong Lian Qingxiao Feng Hualong Li Han Dong |
| author_facet | Kai Lei Long Chen Hengchang Lu Xintong Lian Qingxiao Feng Hualong Li Han Dong |
| author_sort | Kai Lei |
| collection | DOAJ |
| description | The CASTRIP process is an innovative method for producing flat rolled low-carbon and low-alloy steel at very thin thicknesses. By casting steel close to its final dimensions, enormous savings in time and energy can be realized. In this paper, an ultra-high-strength low-alloy corrosion-resistant steel was produced through the CASTRIP process. Microstructure and properties were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), laser confocal microscopy (LSCM), electron backscattered diffraction (EBSD), and tensile testing. The results show that the microstructure is mainly composed of polygonal ferrite, bainite ferrite, and acicular ferrite. The bainite ferrite forms parallel lath bundles nucleating at austenite grain boundaries, propagating perpendicularly into the parent grains. The acicular ferrite exhibits a cross-interlocked morphology preferentially nucleating at oxide/sulfide inclusions. Microstructural characterization confirms that the phase transformation of acicular ferrite and bainite ferrite introduces high-density dislocations, identified as the primary strengthening mechanism. Under the CASTRIP process, corrosion-resistant elements such as Cu, P, Sb, and Nb are completely dissolved in the matrix without grain boundary segregation, thereby contributing to solid solution strengthening. |
| format | Article |
| id | doaj-art-c1d3d310bac64970a90e29113e98cec9 |
| institution | Kabale University |
| issn | 2073-4352 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| series | Crystals |
| spelling | doaj-art-c1d3d310bac64970a90e29113e98cec92025-08-20T03:32:12ZengMDPI AGCrystals2073-43522025-06-0115759510.3390/cryst15070595Microstructure and Properties of Corrosion-Resistant Steel Produced by CASTRIPKai Lei0Long Chen1Hengchang Lu2Xintong Lian3Qingxiao Feng4Hualong Li5Han Dong6School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaJiangsu Shagang Iron and Steel Research Institute, Zhangjiagang 215625, ChinaJiangsu Shagang Iron and Steel Research Institute, Zhangjiagang 215625, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaThe CASTRIP process is an innovative method for producing flat rolled low-carbon and low-alloy steel at very thin thicknesses. By casting steel close to its final dimensions, enormous savings in time and energy can be realized. In this paper, an ultra-high-strength low-alloy corrosion-resistant steel was produced through the CASTRIP process. Microstructure and properties were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), laser confocal microscopy (LSCM), electron backscattered diffraction (EBSD), and tensile testing. The results show that the microstructure is mainly composed of polygonal ferrite, bainite ferrite, and acicular ferrite. The bainite ferrite forms parallel lath bundles nucleating at austenite grain boundaries, propagating perpendicularly into the parent grains. The acicular ferrite exhibits a cross-interlocked morphology preferentially nucleating at oxide/sulfide inclusions. Microstructural characterization confirms that the phase transformation of acicular ferrite and bainite ferrite introduces high-density dislocations, identified as the primary strengthening mechanism. Under the CASTRIP process, corrosion-resistant elements such as Cu, P, Sb, and Nb are completely dissolved in the matrix without grain boundary segregation, thereby contributing to solid solution strengthening.https://www.mdpi.com/2073-4352/15/7/595CASTRIP ultra-low-carbon steeldislocation strengtheningacicular ferritebainite ferritecorrosion-resistant |
| spellingShingle | Kai Lei Long Chen Hengchang Lu Xintong Lian Qingxiao Feng Hualong Li Han Dong Microstructure and Properties of Corrosion-Resistant Steel Produced by CASTRIP Crystals CASTRIP ultra-low-carbon steel dislocation strengthening acicular ferrite bainite ferrite corrosion-resistant |
| title | Microstructure and Properties of Corrosion-Resistant Steel Produced by CASTRIP |
| title_full | Microstructure and Properties of Corrosion-Resistant Steel Produced by CASTRIP |
| title_fullStr | Microstructure and Properties of Corrosion-Resistant Steel Produced by CASTRIP |
| title_full_unstemmed | Microstructure and Properties of Corrosion-Resistant Steel Produced by CASTRIP |
| title_short | Microstructure and Properties of Corrosion-Resistant Steel Produced by CASTRIP |
| title_sort | microstructure and properties of corrosion resistant steel produced by castrip |
| topic | CASTRIP ultra-low-carbon steel dislocation strengthening acicular ferrite bainite ferrite corrosion-resistant |
| url | https://www.mdpi.com/2073-4352/15/7/595 |
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