Improvement of Heat-Affected Zone Toughness of Steel Plates for High Heat Input Welding by Inclusion Control with Ca Deoxidation
The characteristics of inclusions and microstructure in heat-affected zones (HAZs) of steel plates with Ca deoxidation after high heat input welding of 400 kJ·cm<sup>−1</sup> were investigated through simulated welding experiments and inclusions automatic analyzer syst...
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MDPI AG
2018-11-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/8/11/946 |
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| author | Ruizhi Wang Jian Yang Longyun Xu |
| author_facet | Ruizhi Wang Jian Yang Longyun Xu |
| author_sort | Ruizhi Wang |
| collection | DOAJ |
| description | The characteristics of inclusions and microstructure in heat-affected zones (HAZs) of steel plates with Ca deoxidation after high heat input welding of 400 kJ·cm<sup>−1</sup> were investigated through simulated welding experiments and inclusions automatic analyzer systems. Typical inclusions in HAZs of steels containing 11 ppm and 27 ppm Ca were recognized as complex inclusions with the size in the range of 1~3 μm. They consisted of central Al<sub>2</sub>O<sub>3</sub> and peripheral CaS + MnS with TiN distributing at the edge (Al<sub>2</sub>O<sub>3</sub> + CaS + MnS + TiN). With increasing Ca content in steel, the average size of inclusions decreased from 2.23 to 1.46 μm, and the number density increased steadily from 33.7 to 45.0 mm<sup>−2</sup>. Al<sub>2</sub>O<sub>3</sub> + CaS + MnS + TiN complex inclusions were potent to induce the formation of intragranular acicular ferrite (IAF). Therefore, the HAZ toughness of steel plates after high heat input welding was improved significantly by utilizing oxide metallurgy technology with Ca deoxidation. |
| first_indexed | 2024-12-10T12:55:15Z |
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| id | doaj.art-d3df4a4d30174d27b38018dfb7a1e673 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-10T12:55:15Z |
| publishDate | 2018-11-01 |
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| series | Metals |
| spelling | doaj.art-d3df4a4d30174d27b38018dfb7a1e6732022-12-22T01:48:07ZengMDPI AGMetals2075-47012018-11-0181194610.3390/met8110946met8110946Improvement of Heat-Affected Zone Toughness of Steel Plates for High Heat Input Welding by Inclusion Control with Ca DeoxidationRuizhi Wang0Jian Yang1Longyun Xu2School of Metallurgy, Northeastern University, Shenyang 110083, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110083, ChinaState Key Lab of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaThe characteristics of inclusions and microstructure in heat-affected zones (HAZs) of steel plates with Ca deoxidation after high heat input welding of 400 kJ·cm<sup>−1</sup> were investigated through simulated welding experiments and inclusions automatic analyzer systems. Typical inclusions in HAZs of steels containing 11 ppm and 27 ppm Ca were recognized as complex inclusions with the size in the range of 1~3 μm. They consisted of central Al<sub>2</sub>O<sub>3</sub> and peripheral CaS + MnS with TiN distributing at the edge (Al<sub>2</sub>O<sub>3</sub> + CaS + MnS + TiN). With increasing Ca content in steel, the average size of inclusions decreased from 2.23 to 1.46 μm, and the number density increased steadily from 33.7 to 45.0 mm<sup>−2</sup>. Al<sub>2</sub>O<sub>3</sub> + CaS + MnS + TiN complex inclusions were potent to induce the formation of intragranular acicular ferrite (IAF). Therefore, the HAZ toughness of steel plates after high heat input welding was improved significantly by utilizing oxide metallurgy technology with Ca deoxidation.https://www.mdpi.com/2075-4701/8/11/946heat-affected zonehigh heat input weldingCa deoxidationinclusion controlintragranular acicular ferrite |
| spellingShingle | Ruizhi Wang Jian Yang Longyun Xu Improvement of Heat-Affected Zone Toughness of Steel Plates for High Heat Input Welding by Inclusion Control with Ca Deoxidation Metals heat-affected zone high heat input welding Ca deoxidation inclusion control intragranular acicular ferrite |
| title | Improvement of Heat-Affected Zone Toughness of Steel Plates for High Heat Input Welding by Inclusion Control with Ca Deoxidation |
| title_full | Improvement of Heat-Affected Zone Toughness of Steel Plates for High Heat Input Welding by Inclusion Control with Ca Deoxidation |
| title_fullStr | Improvement of Heat-Affected Zone Toughness of Steel Plates for High Heat Input Welding by Inclusion Control with Ca Deoxidation |
| title_full_unstemmed | Improvement of Heat-Affected Zone Toughness of Steel Plates for High Heat Input Welding by Inclusion Control with Ca Deoxidation |
| title_short | Improvement of Heat-Affected Zone Toughness of Steel Plates for High Heat Input Welding by Inclusion Control with Ca Deoxidation |
| title_sort | improvement of heat affected zone toughness of steel plates for high heat input welding by inclusion control with ca deoxidation |
| topic | heat-affected zone high heat input welding Ca deoxidation inclusion control intragranular acicular ferrite |
| url | https://www.mdpi.com/2075-4701/8/11/946 |
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