| 引用本文: | 胡建华,郝亚栋,宋博,李靖,陈建勋,双远华.316L/20复合管热连轧过程变形与应力分析及其实验研究[J].材料科学与工艺,2025,33(2):82-89.DOI:10.11951/j.issn.1005-0299.20230245. |
| HU Jianhua,HAO Yadong,SONG Bo,LI Jing,CHEN Jianxun,SHUANG Yuanhua.Analysis and experimental study on deformation and stress of 316L/20 composite pipe during hot continuous rolling[J].Materials Science and Technology,2025,33(2):82-89.DOI:10.11951/j.issn.1005-0299.20230245. |
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| 摘要: |
| 为研究复合管热轧过程中的应力变化规律及复合管变形规律,本文以六机架热连轧316L/20复合管为例,采用理论分析结合有限元模拟的方法,获得了变形过程中双层金属的壁厚与等效应力分布情况。按照理论计算所得工艺参数进行轧制实验,并对经轧制实验轧出的复合管进行拉剪实验和夹持实验,同时对轧制试样界面结合处进行了晶间腐蚀和微观组织观察。力学性能实验结果显示,轧制试样结合面层间剪切强度达到445 MPa,所能承受的最大剪切应力远大于国标要求。微观组织观察显示,金属间界面结合良好,且在界面处形成明显的过渡层,未发现晶间腐蚀裂纹。研究表明,轧后复合管双层金属壁厚分布均匀,结合情况良好,验证了本文轧制模型工艺参数的合理性。 |
| 关键词: 复合管 热连轧 有限元模型 等效应力 微观组织 晶间腐蚀 |
| DOI：10.11951/j.issn.1005-0299.20230245 |
| 分类号:TG339 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(52275358)；山西省自然基金资助项目(202202021221158). |
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| Analysis and experimental study on deformation and stress of 316L/20 composite pipe during hot continuous rolling |
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HU Jianhua1, HAO Yadong1, SONG Bo2, LI Jing1, CHEN Jianxun1, SHUANG Yuanhua1
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(1.College of Material Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China; 2.Shanxi Taigang Stainless Steel Pipe Co., Ltd., Taiyuan 030024, China)
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| Abstract: |
| In order to study the stress variation and deformation pattern of 316L/20 composite pipe during hot rolling, theoretical analysis combined with finite element simulation method is used in this paper. Taking 316L/20 composite pipe for six-stand hot rolling as an example, the distribution of wall thickness and equivalent stress of the bilayer metal during deformation are obtained. Rolling experiments are carried out according to the calculated process parameters, followed by tension-shear tests and clamping test on the rolled composite pipes. Additionally, intergranular corrosion and microstructure observations are performed at the interface of the rolled samples. The test results show that the interlaminar shear strength at the interface of the rolled samples reaches 445 MPa, which exceeds the maximum shear stress required by the national standard. Microstructure observations reveal that the intermetallic interface is well bonded with a clear transition layer formed at the interface. No intergranular corrosion crack is found. The study confirms that the wall thickness of the double-layer metal is well distributed and the combination is good, which validates the rationality of the process parameters in the rolling model proposed in this study. |
| Key words: composite pipe hot rolling finite element model equivalent stress microstructure intergranular corrosion |
