Correlation between welding structure and corrosion behavior of high strength low alloy (HSLA) ship steel in Cl--containing solutions

Li, Y.C.; Zhu, Wanting; Sun, Lu; Li, L.Y.

doi:10.1016/j.ijoes.2023.100295

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…Welding is one of the main joining technologies for large-scale structures, particularly multi-pass welding for thick-walled structures in engineering projects. However, owing to the actual working conditions, welding should be performed at various positions, such as the 2G and 3G positions for penstock steel pipes [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Comparisons of microstructure and mechanical properties of MAG joints welded under 2G and 3G conditions

Peng,

Zhang,

Qiao

et al. 2024

Mater. Res. Express

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MAG welding of 07MnMoVR steel was performed at the 2G and 3G positions, and weld formation, microstructure, residual stress, and tensile properties were compared. In this study, welds without defects were obtained at the 2G and 3G positions. The results showed that a larger distortion of the weld at the 3G position was present because of the higher heat input and that the perlage morphology was related to the introduction of the arc weaving process. In addition, the grain size of the filling pass was coarser than that of the cap pass because of the repeated heating process, and the grain sizes of the filling and cap passes increased by approximately 33% for the weld at the 3G position compared with that at the 2G position. In this case, the weld at the 3G position showed a larger residual stress and lower yield and tensile strengths, and the elongation rates and microhardness of the weld at the 3G position were lower than were those of the weld at the 2G position, regardless of the root pass, filling pass, or cap pass.

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Section: Introductionmentioning

confidence: 99%

Comparisons of microstructure and mechanical properties of MAG joints welded under 2G and 3G conditions

Peng,

Zhang,

Qiao

et al. 2024

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

Bonding Strength of 12Cr-0.4C/Low Carbon Steel (LCS) Weld Joint After Solid Solution Heat Treatment

Zhu,

Wang,

Zhou

et al. 2024

JOM

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Experimental Study on the Optimization of Rust Removal Effect on Surface Erosion of Grade A Marine Steel by Ultra-High-Pressure Water Jet

Zhang,

Cao,

Shi

et al. 2024

Metals

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To improve the rust removal effect of grade A marine steel by ultra-high-pressure water jets, the rust removal efficiency and rust removal quality are used as measurement standards. Taking jet pressure, standoff distance, and nozzle traverse speed as influencing factors, an orthogonal experimental table was established, and different combinations of process parameters were used to impact the surface of grade A marine steel. The rust removal efficiency is expressed by the rust removal area per unit time. The larger the rust removal area, the higher the rust removal efficiency. The rust removal quality is expressed by the erosion depth. The smaller the erosion depth, the higher the rust removal quality. Using the range analysis method to process the orthogonal experimental data, we determined the optimal process parameters for the rust removal efficiency and rust removal quality. The microscopic morphology of marine grade A steel after rust removal was observed using a confocal microscope to determine the sample with the best rust removal effect. The results indicate that the optimal process parameters for rust removal efficiency are jet pressure of 200 MPa, standoff distance of 90 mm, and nozzle traverse speed of 240 mm/min. The optimal process parameters for rust removal quality are jet pressure of 160 MPa, standoff distance of 60 mm, and nozzle traverse speed of 240 mm/min. The optimal process parameters for rust removal effect are jet pressure of 160 MPa, standoff distance of 90 mm, and nozzle traverse speed of 240 mm/min. By analyzing the microscopic morphology of the samples, the process parameters of the sample with the best rust removal effect were determined to be consistent with the optimal process parameters obtained by range analysis, verifying the accuracy of the optimal process parameters. Compared with the existing jet machining technology, the optimal process parameters obtained in this paper take into account both the rust removal quality and rust removal efficiency, and they improve the rust removal effect.

show abstract

Correlation between welding structure and corrosion behavior of high strength low alloy (HSLA) ship steel in Cl--containing solutions

Cited by 3 publications

References 30 publications

Comparisons of microstructure and mechanical properties of MAG joints welded under 2G and 3G conditions

Comparisons of microstructure and mechanical properties of MAG joints welded under 2G and 3G conditions

Bonding Strength of 12Cr-0.4C/Low Carbon Steel (LCS) Weld Joint After Solid Solution Heat Treatment

Experimental Study on the Optimization of Rust Removal Effect on Surface Erosion of Grade A Marine Steel by Ultra-High-Pressure Water Jet

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