Study on the parameters optimization and the microstructure of spot welding joints of 304 stainless steel
Resistance spot welding experiments of 304 stainless steel were performed in this study. Orthogonal test and analysis method were used to carry out the experiments and optimize process parameters based on their effects on tensile shear load and nugget diameter of the spot-welded joint. The microstru...
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| Language: | English |
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De Gruyter
2025-03-01
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| Series: | High Temperature Materials and Processes |
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| Online Access: | https://doi.org/10.1515/htmp-2024-0039 |
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| author | Liu Hui Yu Lei Wang Dayu |
| author_facet | Liu Hui Yu Lei Wang Dayu |
| author_sort | Liu Hui |
| collection | DOAJ |
| description | Resistance spot welding experiments of 304 stainless steel were performed in this study. Orthogonal test and analysis method were used to carry out the experiments and optimize process parameters based on their effects on tensile shear load and nugget diameter of the spot-welded joint. The microstructure and the defects of spot-welded joints were studied. The highest tensile shear load of joint was 9.529 kN produced at optimum parameters, i.e., electrode force of 3.5 kN, welding current of 6.5 kA, and welding time of eight cycles. Microstructure of the nugget of welded spot joint was columnar dendrite grains which contains austenite and δ-ferrite, and the microstructure of the HAZ region was coarse equiaxed grains of austenite that were induced by different heat inputs. The solidification cracks and shrinkage cavities were observed in resistance spot-welded joints which were produced at higher heat input. These defects seriously reduced the strength of spot-welded joint. |
| format | Article |
| id | doaj-art-db890b80b65b4a2ba9fa93ff31078e21 |
| institution | DOAJ |
| issn | 2191-0324 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj-art-db890b80b65b4a2ba9fa93ff31078e212025-08-20T02:56:33ZengDe GruyterHigh Temperature Materials and Processes2191-03242025-03-01441pp. 38339010.1515/htmp-2024-0039Study on the parameters optimization and the microstructure of spot welding joints of 304 stainless steelLiu Hui0Yu Lei1Wang Dayu2School of Mechanical and Electrical Engineering, Changchun Institute of Technology, Changchun, 130012, ChinaSchool of Mechanical and Electrical Engineering, Changchun Institute of Technology, Changchun, 130012, ChinaSchool of Mechanical and Electrical Engineering, Changchun Institute of Technology, Changchun, 130012, ChinaResistance spot welding experiments of 304 stainless steel were performed in this study. Orthogonal test and analysis method were used to carry out the experiments and optimize process parameters based on their effects on tensile shear load and nugget diameter of the spot-welded joint. The microstructure and the defects of spot-welded joints were studied. The highest tensile shear load of joint was 9.529 kN produced at optimum parameters, i.e., electrode force of 3.5 kN, welding current of 6.5 kA, and welding time of eight cycles. Microstructure of the nugget of welded spot joint was columnar dendrite grains which contains austenite and δ-ferrite, and the microstructure of the HAZ region was coarse equiaxed grains of austenite that were induced by different heat inputs. The solidification cracks and shrinkage cavities were observed in resistance spot-welded joints which were produced at higher heat input. These defects seriously reduced the strength of spot-welded joint.https://doi.org/10.1515/htmp-2024-0039resistance spot welding304 stainless steelorthogonal test methodmicrostructure |
| spellingShingle | Liu Hui Yu Lei Wang Dayu Study on the parameters optimization and the microstructure of spot welding joints of 304 stainless steel High Temperature Materials and Processes resistance spot welding 304 stainless steel orthogonal test method microstructure |
| title | Study on the parameters optimization and the microstructure of spot welding joints of 304 stainless steel |
| title_full | Study on the parameters optimization and the microstructure of spot welding joints of 304 stainless steel |
| title_fullStr | Study on the parameters optimization and the microstructure of spot welding joints of 304 stainless steel |
| title_full_unstemmed | Study on the parameters optimization and the microstructure of spot welding joints of 304 stainless steel |
| title_short | Study on the parameters optimization and the microstructure of spot welding joints of 304 stainless steel |
| title_sort | study on the parameters optimization and the microstructure of spot welding joints of 304 stainless steel |
| topic | resistance spot welding 304 stainless steel orthogonal test method microstructure |
| url | https://doi.org/10.1515/htmp-2024-0039 |
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