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| Performance of Thin Plate 310S Stainless Steel Welded Joints |
| Received:November 19, 2024 Revised:December 10, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.12.016 |
| KeyWord:310S stainless steel tungsten inert gas arc welding high temperature mechanical properties high temperature creep microstructure nano phase |
| Author | Institution |
| WU Xia |
Southwest Institute of Technology and Engineering, Chongqing , China |
| REN Lu |
Economic and Technological Development Center of SASTIND, Beijing, China |
| DAI Ye |
Southwest Institute of Technology and Engineering, Chongqing , China |
| ZHANG Liye |
Economic and Technological Development Center of SASTIND, Beijing, China |
| GUO Jian |
Economic and Technological Development Center of SASTIND, Beijing, China |
| ZHAN Qingqing |
Southwest Institute of Technology and Engineering, Chongqing , China |
| LIU Bo |
Southwest Institute of Technology and Engineering, Chongqing , China |
| SONG Kaiqiang |
Southwest Institute of Technology and Engineering, Chongqing , China |
| YAN Huimin |
Southwest Institute of Technology and Engineering, Chongqing , China |
| LIU Zhengtao |
Southwest Institute of Technology and Engineering, Chongqing , China |
| FU Yangfan |
Southwest Institute of Technology and Engineering, Chongqing , China |
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| Abstract: |
| The work aims to study the microstructure and mechanical properties of welded joints of thin plate 310S stainless steel. In this paper, manual tungsten inert gas arc welding was applied to weld 310S stainless steel and obtain HR3C welding wire welded joints. Room temperature tensile tests, high temperature tensile tests, and high temperature creep property tests were conducted on the welded joints, and the microstructure and fracture morphology of the joints were analyzed. The changes in Fe and Cr elements within the crystal of the weld metal in the welded joint were significant, and Cr elements were enriched at the dendrite boundary. The tensile strength of 310S stainless steel welded joints at room temperature and 850 ℃ tensile conditions was 300 and 140 MPa respectively; At creep temperature of 850 ℃ and creep stress of 50 MPa, the average creep fracture time was 26.7 hours. After high-temperature creep testing of welded joints, there were coarse chromium rich phases on the grain boundaries, and nano phases randomly distributed at the grain boundaries and within the grains. The 310S stainless steel HR3C welding wire joint has good room temperature mechanical properties, with good high-temperature tensile and creep properties at 850 ℃. The nano phase in the weld impedes dislocation movement, improving the high-temperature tensile and creep properties of the joint weld microstructure. |
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