A Uniformed Calculation Criterion on Heat Band Width of Local PWHT on Welded Joint with Dissimilar Thickness
Local post-weld heat treatment is used to reduce welding residual stresses. The existing standards have great differences in the selection of the width of the heated band, and the heating width, as an important control parameter of the local heat treatment, will directly affect the quality of the he...
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MDPI AG
2023-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/6/1100 |
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| author | Yixuan Zhang Jiameng Xie Yun Luo |
| author_facet | Yixuan Zhang Jiameng Xie Yun Luo |
| author_sort | Yixuan Zhang |
| collection | DOAJ |
| description | Local post-weld heat treatment is used to reduce welding residual stresses. The existing standards have great differences in the selection of the width of the heated band, and the heating width, as an important control parameter of the local heat treatment, will directly affect the quality of the heat treatment. In this paper, the numerical simulation method is used to simulate the welding and heat treatment process of unequal-thickness joints. The stress and deformation of the joint with different thickness ratios under different heating widths are studied by finite element simulation, focusing on the influence of the width of the heated band on the residual stress relief of the joint. Based on these studies, the criteria for determining the optimal width of the heating zone are consistent. Finally, the formula <inline-formula><math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">B</mi><mo>=</mo><msub><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">B</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>+</mo><msub><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">B</mi></mrow><mrow><mn>2</mn></mrow></msub><mo>=</mo><mn>3</mn><msqrt><mi>R</mi><mi>T</mi></msqrt><mo>+</mo><mfrac><mrow><mn>1</mn><mo>+</mo><mi>k</mi></mrow><mrow><mn>2</mn></mrow></mfrac><msqrt><mi>R</mi><mi>T</mi></msqrt></mrow></semantics></math></inline-formula> for calculating local heat treatment heating width based on the thickness of welded joint for SA738Gr.B steel is established. Among them, <inline-formula><math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><msub><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">B</mi></mrow><mrow><mn>1</mn></mrow></msub></mrow></semantics></math></inline-formula> is the width of the main heating zone, <inline-formula><math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><msub><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">B</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></semantics></math></inline-formula> is the width of the auxiliary heating zone, k is the thickness ratio of the thick plate to the thin plate, and t is the wall thickness of the thin plate. |
| first_indexed | 2024-03-11T02:09:36Z |
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| institution | Directory Open Access Journal |
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| spelling | doaj.art-bb4a902a0122433e89b2a1ba70c170ea2023-11-18T11:36:48ZengMDPI AGMetals2075-47012023-06-01136110010.3390/met13061100A Uniformed Calculation Criterion on Heat Band Width of Local PWHT on Welded Joint with Dissimilar ThicknessYixuan Zhang0Jiameng Xie1Yun Luo2College of New Energy, China University of Petroleum (East China), Qingdao 266580, ChinaCollege of New Energy, China University of Petroleum (East China), Qingdao 266580, ChinaCollege of New Energy, China University of Petroleum (East China), Qingdao 266580, ChinaLocal post-weld heat treatment is used to reduce welding residual stresses. The existing standards have great differences in the selection of the width of the heated band, and the heating width, as an important control parameter of the local heat treatment, will directly affect the quality of the heat treatment. In this paper, the numerical simulation method is used to simulate the welding and heat treatment process of unequal-thickness joints. The stress and deformation of the joint with different thickness ratios under different heating widths are studied by finite element simulation, focusing on the influence of the width of the heated band on the residual stress relief of the joint. Based on these studies, the criteria for determining the optimal width of the heating zone are consistent. Finally, the formula <inline-formula><math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">B</mi><mo>=</mo><msub><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">B</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>+</mo><msub><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">B</mi></mrow><mrow><mn>2</mn></mrow></msub><mo>=</mo><mn>3</mn><msqrt><mi>R</mi><mi>T</mi></msqrt><mo>+</mo><mfrac><mrow><mn>1</mn><mo>+</mo><mi>k</mi></mrow><mrow><mn>2</mn></mrow></mfrac><msqrt><mi>R</mi><mi>T</mi></msqrt></mrow></semantics></math></inline-formula> for calculating local heat treatment heating width based on the thickness of welded joint for SA738Gr.B steel is established. Among them, <inline-formula><math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><msub><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">B</mi></mrow><mrow><mn>1</mn></mrow></msub></mrow></semantics></math></inline-formula> is the width of the main heating zone, <inline-formula><math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><msub><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">B</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></semantics></math></inline-formula> is the width of the auxiliary heating zone, k is the thickness ratio of the thick plate to the thin plate, and t is the wall thickness of the thin plate.https://www.mdpi.com/2075-4701/13/6/1100local post-weld heat treatmentwidth of heated bandwelding residual stressesfinite element methodunequal-thickness joint |
| spellingShingle | Yixuan Zhang Jiameng Xie Yun Luo A Uniformed Calculation Criterion on Heat Band Width of Local PWHT on Welded Joint with Dissimilar Thickness Metals local post-weld heat treatment width of heated band welding residual stresses finite element method unequal-thickness joint |
| title | A Uniformed Calculation Criterion on Heat Band Width of Local PWHT on Welded Joint with Dissimilar Thickness |
| title_full | A Uniformed Calculation Criterion on Heat Band Width of Local PWHT on Welded Joint with Dissimilar Thickness |
| title_fullStr | A Uniformed Calculation Criterion on Heat Band Width of Local PWHT on Welded Joint with Dissimilar Thickness |
| title_full_unstemmed | A Uniformed Calculation Criterion on Heat Band Width of Local PWHT on Welded Joint with Dissimilar Thickness |
| title_short | A Uniformed Calculation Criterion on Heat Band Width of Local PWHT on Welded Joint with Dissimilar Thickness |
| title_sort | uniformed calculation criterion on heat band width of local pwht on welded joint with dissimilar thickness |
| topic | local post-weld heat treatment width of heated band welding residual stresses finite element method unequal-thickness joint |
| url | https://www.mdpi.com/2075-4701/13/6/1100 |
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